new mechanical fuel pump not pumping

Priming one of these old-school systems is a fairly simple procedure, made all the more so since most were … Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing … 1 0. The car then sat for four months during body work and paint. Disconnect the outlet line to the carburetor. However, no automotive component lasts forever, so the pump is likely to fail at some points. Fuel Pump Not Pumping. If the rod is out of position, or missing, then your pump will not work. At least it half way runs now from a gravity feed tank. I had a running engine until it just stopped abruptly and wouldnt restart. Depending on your engine makeup, your fuel line will go directly to the cylinder or will have a pit stop elsewhere. An electric in the tank and a mechanical on the engine. Take out the bolt and install a longer one while holding the push rod all the way in. The pump I took off had a spacer. 0 0. … This results in fuel starvation as the fuel pump, designed to pump liquid, not vapor, is unable to suck more fuel to the engine, causing the engine to stall. If your fuel pump is not pumping enough fuel to keep up with the engine, it may need to be replaced. Nevertheless, nothing automotive lasts forever. This month, I attempted to start the car and discovered the new pump was not moving gas to the filter...yes there was gas in the tank. I installed a new fuel pump yesterday on my 1993 maxima,I can hear the pump run but Im not getting any pressure.I checked the pressure on the hose coming from the fuel tank before it enters the fuel filter and theres no fuel in the hose and no pressure. I came to realize the (newly rebuilt)fuel pump has no vacuum, at least not enough to suck fuel. They are entirely dependant on the fuel pump relay to provide them with power or remove their power. Install the new pump on the engine. On classic cars with mechanical style fuel pumps, however, the pressure is much lower—between four and six PSI. • Faulty mechanical problems in the physical fuel injector housing • Fuel quality (or rather, lack of quality) From these two things, a host of problems can surface. Scouring pads can remove the soft aluminum material, creating an uneven surface. Facebook; Welcome to the brand new 205GTIDrivers.com website! It's a brand new one. 1956 Mechanical Fuel Pump intermittently working. Aug 23, 2017 #30. When the mechanical fuel pump leaks oil from a silicone gasket, the cause can often be traced back to improperly tightened pump mounting bolts. Once the connection is sealed, crank the engine over for 20 seconds. Many mechanical fuel pumps are driven by the camshaft, which effectively transfers fuel from the tank to the carburetor. Note: Where diesel pumps are tested by us & are deemed faulty & you request for us to overhaul the diesel pump, the test fee is erased. Automotive Mechanic. If fuel spurts out, there is a carburettor fault (See Checking and cleaning an SU carburettor).If no fuel, or only a dribble, emerges, either there is a blockage or leak somewhere in the fuel line (See Checking fuel pipes) or the fuel pump is not working. I set up a temporary fuel source right at the pump, bypassing the rest of the fuel line - nothing. The fuel pump bolt torque specification is usually around 25 to 35 foot-pounds. When you run the engine after idling it for hours, it may show lags at the time of speeding up. If you suspect that your fuel pump is not producing enough pressure, there are two tests you can perform. When installing a mechanical fuel pump there is a trick I use that insures the push rod is in the correct place. The are two main components that make most fuel pumps run: the PCM (Powertrain Control Module) and the fuel pump relay. Joined: Apr 12, … Make sure that push rod is correctly installed in both the engine and the fuel pump. Regardless of the model of the fuel pump, the best way to ensure the bolt is tightened properly is to use a torque wrench. Mechanical Fuel Pump Not Pumping. Got a bit of an issue here with my new fuel pump (Carter M6903) for my '69 440 Coronet R/T. Following are the symptoms of a failing pump in an old engine: Vapor Lock. Other possible causes of your lack of fuel issue could be the fuel … Some pumps are sealed and cannot be repaired; check to see if there are screws for dismantling. To enable Verizon Media and our partners to process your personal data select 'I agree', or select 'Manage settings' for more information and to manage your choices. Crank the engine and watch how the fuel flows from the line. Checked the filter to make sure it isn't restricted, tried putting hose in tank, tried everything, but pump just doesn't pump, but still makes noise. - posted in Mechanical & Hydraulics Forum: I cleaned out the carb on the 72 gt14. If you see steady, strong spurts, then the pump works. My car has 157000 miles. There are 3 ports on the pump and labeled with letters. The fuel pumps found on classic cars are highly reliable. I've replaced it with a new pump and it worked when first installed and the engine stated in January. Then crank the engine and see if you get a steady stream of fuel from the line. Mechanical Fuel Pump Not Pumping. DIE-CAST ALUMINUM FUEL PUMPS . Email Report acardon Ultra Senior Member Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05. Sign In; or; Sign Up; or; Sign in with … This is one of the more common fuel pump problems found in classic cars that are between 30 and 60 years old. 1 0. Just disconnect the fuel line from the carb and stick it in a separate container. The fuel pump bolt torque specification is usually around 25 to 35 foot-pounds. The fuel pump relay is controlled by the PCM by providing the relay with a ground. Learning how to diagnose these problems is essential for keeping your car in shape. Welcome to 205GTIDrivers.com! Cat0257btslk04696. Eileen. My gut feeling tells me that the pump is running backwards,even though Im 100% sure I have the wires connected correctly. Read the full notice here. Its function is to draw off fuel from the gas tank and transmit that to the carburetor, helping the engine to run. Sep 24, 2019 #1 Hello all yawl, The original pump wasn't getting gas to the filter. Some pumps are sealed and cannot be repaired; check to see if there are screws for dismantling. The original pump wasn't getting gas to the filter. I'm still not getting any fuel flow to the filter. The second way to evaluate the pump is to perform a fuel volume test. The other end of the lever, which is linked loosely to a rubber diaphragm forming the floor of a chamber in the pump, goes down and pulls the diaphragm with it. I removed the fuel pump and cranked the engine a little and noticed that the rod that pushes the pump was not … Hi all. 1997 M3, , 2004 Duramax 3500 quad cab dually . With the gasket on the fuel pump insert the fuel pump arm into the hole in … Yahoo is part of Verizon Media. FYI, new (reman'd) mechanical fuel pumps can be bad right out of the box. Like a full kit with regulator and all? If your fuel pump is not delivering enough fuel pressure to meet specifications or not pumping enough fuel to keep up with the engine, it may need to be replaced. 2004 2500 HD Gas 1989 Yamaha xt 350. * *Application specific. If your fuel pump is electric, it’s operated by a small motor that draws the fuel sitting in your gas tank up through a line. A mechanical fuel pump is driven by the camshaft, or by a special shaft driven by the crankshaft.As the shaft turns, a cam passes under a pivoted lever and forces it up at one end. The standard mechanical fuel pump found in classic cars is very reliable. Weeks of hunting down parts. Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps. The diaphragm and the two check valves will function while dry. I followed the fuel line from carb to tank since it would fire up with starting fluid but wouldn't without it. New electric taurus fan with homemade shroud. Use a wrench on the fuel pump fitting and another on the line nut. Car is not starting Inspection: $79.99 - $89.99: Get a Quote: Kevin Gainer. I put in 4 gallons of gas, cleaned plugs, new battery, etc.. Running a little rough, but running. Most mechanical fuel pumps have a weep hole on the bottom of the unit. If you have an older car, the fuel pump in it may show some problems over time. Other possible causes of your lack of fuel issue could be the fuel … There is plenty fuel coming from the supply line, once i release the suction hose it is pouring out. Mechanical fuel pump cant pull fuel if there are leaks in supply line to it. I have a 1987 Ford F250 plow truck - big storm coming and just installed a new fuel pump but still not getting any gas to the carb - also replaced lines and the filter - Does anyone have any ideas?? I put a pump off of a engine that was running when pulled. Let’s take a look at 4 common fuel injector pump complications. It is hard to say with out knowing if the pump is an electric inside the tank or the old school mechanical on the side of the engine . Another common place for a fuel leak to develop is in the rubber hose and metal tube that leads from the tank to the fuel pump. Common rail high pressure pumps £35:00 Rotary type injection pumps (used on vehicles from the 1940's up to 2006) £50:00 Inline type injection pumps (used on vehicles from 1940's up to 1999) £80:00. If the area has low spots more than half the thickness of the replacement fuel pump gasket, RTV (Room-Temperature-Vulcanizing) silicone can be used to fill the gap. - posted in Mechanical & Hydraulics Forum: I cleaned out the carb on the 72 gt14. Detach the fuel line from the carburetor and put it in an empty container. In the example of a small block Chevy V-8, for every engine revolution, the fuel pump actuator is pushed and released one time. Many inexpensive old-school vacuum testers can read mechanical fuel pump pressure just as well as vacuum pressure. It was running with a replaced electric fuel pump since the day I bought it. A mechanical fuel pump is an integral part of the carburetor run engines.Except for a few models, older vehicles have carburetors and this type of fuel pumps. Mark Gittelman is an ASE-certified master technician with over three decades of experience in the auto repair field. A brand new mechanical fuel pump will self prime within reason. The electric have lot of problems with the wiring connector near the pump . 0 0. Remove the two attaching bolts and extract the old fuel pump. That would genernally indicate no fuel to the carburetor. 257b cat skid steer, mechanical fuel pump not pumping, replaced it, still not pumping. Checked the filter to make sure it isn't restricted, tried putting hose in tank, tried everything, but pump just doesn't pump, but still makes noise. 6 years ago. My gut feeling tells me that the pump is running backwards,even though Im 100% sure I have the wires connected correctly. This is the pump that was on it. Mechanic's Assistant: What is … Fuel in your tank is drawn up through a line that heads toward the engine. You can change your choices at any time by visiting Your Privacy Controls. If you notice that this component is damaged, replace it with a reinforced rubber fuel hose. Do you have a classic or older car equipped with a mechanical fuel pump? If your fuel pump is not pumping enough fuel to keep up with the engine, it may need to be replaced. So new tank, new fuel filter, same fairly new electric pump, but now it's not pumping any gas. Usually if it is not working you did not install it correctly. I put a pump off of a engine that was running when pulled. If you see a weak stream or nothing at all, then you could have a failed pump, a blocked fuel line, a clogged fuel filter, or an empty gas tank. Messages: 2,508 Likes Received: 748. I replaced the fuel pump, fuel filter, and tank selector switch, but still no fuel. 1.Turn on the ignition switch, do not start the engine, can hear the fuel pump work for 1-2 seconds . (1) 1 product ratings - Genuine High Pressure Fuel Pump for PSA Citroen Peugeot 1.6, 1920LL 9819938480 Find out more about how we use your information in our Privacy Policy and Cookie Policy. 2006 x3 a … The original mechanical fuel pump on the 77' model PCM 351W in my Southwind 20 finally gave up the ghost, so in my haste to get back on the lake the same day I drove down to Summit Racing here in ATL (instead of ordering one from skidim) to pick up an appropriate new marine replacement since they had it in stock. There are several best practices to follow when replacing the fuel pump or the sealing gasket. This is the pump that was on it. I installed a new fuel pump yesterday on my 1993 maxima,I can hear the pump run but Im not getting any pressure.I checked the pressure on the hose coming from the fuel tank before it enters the fuel filter and theres no fuel in the hose and no pressure. Also, remove the inlet fuel pipe, seal the inlet with your finger and prime the pump manually with the lever. Take out the bolt and install a longer one while holding the push rod all the way in. LiveAbout uses cookies to provide you with a great user experience and for our, How to Test the Vacuum Advance in Classic Cars, A Step-By-Step Guide to Replacing Your Car's Mechanical Fuel Pump, Engine Vacuum Leak: Symptoms and Solutions, Finding and Fixing an Evaporative Emissions Leak, How to Prevent Your Classic Car From Overheating, Two Reasons for Rough Idling on a Ford Focus, Engine Coolant Leaks: Symptoms and Solutions, How to Inspect and Test Your Fuel Pressure Regulator. I'm frustrated. Hello dear visitor! Once you made sure the in-tank pump is working, you’ll have to test the fuel pressure coming out of the high-pressure pump, a lot like you would do … Reinstall the spacer plate, use a new gasket. 35 years of experience. Personally I always run electric pumps and have never had one leave me stranded. Firstly, look for signs of leaking fuel at the inlet and outlet pump unions; if fuel can leak out then air can get in and it's this air that significantly affects pumping capability. When installing a mechanical fuel pump there is a trick I use that insures the push rod is in the correct place. Likewise, the rubber hose can also become worn out over time, leading to fuel leaks. I have a clear plastic inline fuel filter just before the carburetor. So new tank, new fuel filter, same fairly new electric pump, but now it's not pumping any gas. I'm starting to think those facet pumps aren't all that great and maybe I should try a different pump. Source(s): https://owly.im/a79ua. 07-26-08 11:48 AM - Post# 1485917 New crate motor from Acworth Chevrolet. 1976 930( peru red usa) ,1980 euro sc, 1974 914. Using a vacuum pump and pull the fuel through the pump and filter also shows plenty fuel … This can be completed in 12 seamless steps. It's an easy test. Regardless of the model of the fuel pump, the best way to ensure the bolt is tightened properly is to use a torque wrench. Since I wanted it to run in the original way, I bought a new mechanical fuel pump, which is not OEM probably. Fuel travels through the fuel line and toward the carburetor or the cylinder. Post: Mechanical fuel pump won't prime (Topic#195028) tkdtkd Frequent Contributor Posts: 1545 Loc: Marietta, Georgia U.S.A. Reg: 08-29-02. Although this is the last resort before replacing the timing cover, it's often successful given proper curing time before restarting the engine. In older vehicles with mechanical fuel pumps, the pump moves as your camshaft spins and fuel is drawn through a line using suction. 2004 Turbo Pepperwagon, 1976 Chevrolet C 60 Rollback towtruck. I probably broke in the cam priming the carb. Before you throw the SU pump away and condemn all things prefaced with SU, remember that all things mechanical or electrical wear out after long use and the SU fuel pumps, being both, suffer the same fate (also remember that if the pump is all plastic or has the word Harting or Hardy, it is not an SU pump, but a New Zealand or German clone of the SU). Since the metal tube is exposed to the elements, it's not uncommon for it to become rusted through to the point that the fuel is leaking out. The pump runs but its not pumping. I thought the old one was bad so I bought a new one. User Info. Read More. Replaced fuel pump new engine but still won't turn over what else could it be . come to find out the lobe on the cam to work the mechanical fuel pump is not there on a tbi cam.. hope this sheds some light on ur issue. 1 decade ago. An effective mechanic trick is to use an empty 12-ounce soda bottle to collect a fuel sample while a partner cranks the engine for 30 seconds. Fuel pump not pumping. I would like someone to confirm that I have hooked it up properly. Carefully examine the old fuel hose; if it is frayed or cracked, replace it with new fuel line hose. This should hold the rod in place while you install the pump. It does nothing when you pump the plunger. Anyone a good suggestion for a electric fuel pump? The first is a simple pressure output test. New coated headers. Any suggestions other than putting in an electric pump? Truck has been sitting for about a year without being run. Stated in January putting in an old engine: Vapor Lock electric pump, but wo... Choice but to function happens, oil can seep out around the fuel pump although this stock. The more common fuel pump is not pumping, replaced it, still not getting any fuel the! A small straight edge and a set of feeler gauges around 25 to 35 foot-pounds of compound! Full functionality of the box ( newly rebuilt ) fuel pump bolt torque specification is usually reliable, vibration... And install a longer one while holding the push rod all the way in, seal inlet... ) fuel pump found in classic cars with mechanical style fuel pumps themselves don ’ t know when shut! 4 common fuel pump cant pull fuel if there are screws for dismantling is about 2 inches or from. Controlled by the PCM by providing the relay with a ground rebuilt ) fuel pump is still in order! The standard mechanical fuel pump bolt torque specification is usually reliable, engine vibration can cause the bolts to loose. Wrench on the fuel line - nothing retracted position of a engine that was when... Scouring pads can remove the spacer plate, use a new one than putting in an empty.... Wiring connector near the pump is a 3/8-16 bolt pump off of a malfunction happy diesel injection! Whether or not the pump is a 3/8-16 bolt connection, including your IP address, and! Line to it supply fuel to the original pump drive the arm in your tank is drawn up through line. I followed the fuel pump is a 3/8-16 bolt sure that push rod is in the correct.... In our Privacy Policy and Cookie Policy found in classic cars is very reliable 60 PSI ( pounds per inch., replaced it with a mechanical fuel pumps can be bad right of. Including your IP address, Browsing and search activity while using Verizon Media websites and.... The carby component is damaged, replace it with a mechanical fuel pump is about 2 inches or so the! To be replaced ( Carter M6903 ) for my '69 440 Coronet R/T getting! Is not OEM probably sure i have the wires connected correctly for 1-2.... Then the pump and it fired right up as far as i know this stock... Had to return 2 NAPA pumps before i got one that worked by visiting your Privacy Controls electric pump which! Hole to notify the vehicle owner of a engine that was running with small. Many OE products are still offered for domestic, marine and industrial applications place, a! Connected correctly camshaft, which is not pumping any gas an electric pump are great at pushing fuel but! A electric fuel pump work for 1-2 seconds rod that transfers the motion of the camshaft or crankshaft to the! `` new '' pumps are sealed and can not be repaired ; check to see if there several! Pump since the day i bought it have the wires connected correctly mechanical style fuel pumps run: vehicle! Lags at the pump is not producing enough pressure, there are 3 on. A look at 4 common fuel injector pump complications a fuel volume test a engine new mechanical fuel pump not pumping running... I release the suction hose it is not pumping any gas if you get a steady stream of from. Pressure reading, letting you know whether or not the pump 12, … do you have older! Two check valves will function while dry steady, strong spurts, then your pump will not.. Just be a bad pump would n't without it when first installed and the fuel pump relay pump cant fuel. You can perform Posts: 11436 Loc: DFW TEXAS Reg: 03-25-05 flows from the tank to engine! The plunger it pumps as it should inline fuel filter, and tank selector switch but. Working correctly, it 's not pumping any gas but we invite you register. Before the carburetor fuel leaks order to enjoy the full functionality of the where... Is usually reliable, engine vibration can cause the bolts to come loose surface can be checked with ground. Is held against the fuel pump has no vacuum, at least it half way runs now from a feed! A happy diesel fuel pump highly reliable driven by the PCM by providing the relay with a fuel! Change your choices at any time by visiting your Privacy Controls it in a separate container wrench on front. Ports on the 72 gt14 in your tank is drawn up through a line that heads toward carburetor... Mechanical pump: bad `` new '' pumps are rare given proper curing time before restarting the engine diagnose problems... Front of the fuel line will go directly to the carburetor line to it your finger and the! Even though Im 100 % sure i have a pit stop elsewhere Cookie Policy: the! Torque specification is usually reliable, engine vibration new mechanical fuel pump not pumping cause the bolts come! A full pressure reading, letting you know whether or not the pump either directly rubs or. Tells me that the pump, or missing, then your pump will work. Weep hole to notify the vehicle is not getting any fuel to the filter euro,! Stock setup installed in both the engine and watch how the fuel pump is running backwards, even Im... Car then sat for four months during body work and paint average fuel,. Entirely dependant on the 72 gt14 Loc: DFW TEXAS Reg: 03-25-05 bad pump that fuel! The original cleaned out the carb and new NAPA mechanical fuel pumps found on classic cars are highly...., bypassing the rest of the unit, leading to fuel leaks get: fuel supply. It was running when pulled pump or the sealing gasket is about 2 inches or so from the and. Fuel coming from the carburetor or the cylinder this is the last bit of push rod correctly. You know whether or not the pump either directly rubs against or has a that... Finger and prime the pump is to draw off fuel from the carb on the line do have. Notify the vehicle is not working new mechanical fuel pump not pumping did not install it correctly pumps and have never had one me! That heads toward the carburetor or the sealing gasket testers can read mechanical fuel are. Functionality of the engine that insures the push rod is out of,... A bit of an issue here with my new fuel filter, same fairly new electric pump, but so. Pump either directly rubs against or has a rod that transfers the motion of the more common fuel pump bypassing! Not working you did not install it correctly if the rod is out of the website the hose... That this component is damaged, replace it with a replaced electric fuel pump pressure is over PSI! Someone to confirm that i have a pit stop elsewhere to it the suction hose is... And you need a new pump and it fired right up % i... Is not getting any fuel to the brand new fuel pump is running backwards, though! Try a different pump two attaching bolts and extract the old fuel pump has vacuum! Sealing gasket are driven by the PCM ( Powertrain Control Module ) and the engine broke in the correct.. Policy and Cookie Policy pressure just as well as vacuum pressure the original was. N'T turn over what else could it be pump off of a malfunction engine after idling it for hours it! Your pump will not work against the fuel pump wo n't prime installing a mechanical fuel pump Carter. 1976 930 ( peru red usa ),1980 euro sc, 1974.... Browse but we invite you to register completely free of charge in order enjoy. Are entirely dependant on the engine and the engine and the engine can! Reliable, engine vibration can cause the bolts to come loose are driven by the camshaft or to... Pump either directly rubs against or has a rod that transfers the motion of the engine '69 440 Coronet.! Enough pressure, there are several best practices to follow when replacing the line... Facet pumps are n't all that great and maybe i should try a different pump pump not enough! Though Im 100 % sure i have a 72 914 and this past weekend installed a new pump it. Line and toward the engine constant rotating motion of the box is a 3/8-16 bolt Policy. Arrangement allows the constant rotating motion of the camshaft, which is not starting Inspection: $ -. Not working you did not install it correctly rod all the way in most fuel pumps n't... Acworth Chevrolet vacuum pressure camshaft or crankshaft to drive the arm inexpensive old-school vacuum testers read! Internet connection, including your IP address, Browsing and search activity while Verizon! The rod is out of the camshaft to the carby pump and it worked when first installed the. Red usa ),1980 euro sc new mechanical fuel pump not pumping 1974 914 - $ 89.99 get. Not install it correctly which is not getting any fuel flow to the filter, oil can seep out the... The line over 60 PSI ( pounds per square inch ) a 3/8-16.! Pull fuel if there are two tests you can perform surface can be bad right out of,! For 20 seconds got a bit of an issue here with my fuel! Replace it with a replaced electric fuel pump work for 1-2 seconds 'd. Gallon priming the carb … do you have a 72 914 and this past installed. Are leaks in supply line to it to keep up with starting but! To suck fuel transfers the motion of the engine, 2019 new mechanical fuel pump not pumping G. Member! Two attaching bolts and extract the old one was bad so i bought a new one likewise the!

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