Question about 1978 Chevrolet Chevette

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How do I remove and replace the fuel pump on a 1978 Chevette?

Car hasn't run in 6 months. The carb was rebuilt, but the fuel line had 2 90 degree kinks. I replaced the fuel line, but it now seems like the carb isn't getting any fuel. I belive this is a mechanical pump. Where is it located and how do I replace it?

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  • Chevrolet Master
  • 14,384 Answers

Hi Dan,I use to have a couple of Chevettes,great on gas,Here's a link on your fuel pump removal,never had a issue with that,on these,you have to change the timing belt every 3 years ,the belt will stretch and jump time and the plugs will get fouled,here's another link on your timing belt if the fuel pump replacement doesn't work,also check your spark plugs. Repair Guides Carbureted Fuel System Fuel Pump AutoZone com Here's the timing belt link. Repair Guides Engine Mechanical Timing Belt And Sprockets AutoZone com

Posted on Dec 10, 2014

Testimonial: "Thank-you Thomas, it seems pretty easy and straight forward with the diagrams. Previous owner bought the pump, I just have to install it. Thanks again!"

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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beest921
  • 23 Answers

SOURCE: 1978 chevy chevette

Make sure your timing belt was reinstalled properly. If your camshaft and crankshaft aren't oriented properly in relation to each other, the engine will not start. On Chevettes, the camshaft pulley has a 1/8" hole in it and the hole aligns with a hole in the cam pulley shroud. Turn the crank pulley to 0 degrees on your timing marks on the engine front cover. Make sure your distributor rotor is pointing at the #1 cylinder cap tower. Install belt and tighten the idler pulley. Good luck!

Posted on Aug 02, 2009

Tnsiouxfalls
  • 617 Answers

SOURCE: 1978 Chevy 1/2 ton Truck - fuel is not getting to

On the front of the carburetor where the fuel line comes in is the fuel filter.Did you change that?Take off that line and slip the end into a container,coffee can size.Have a friend turn over the motor,watch for fuel.If you get fuel your needle and seat have seized in the closed position.No fuel check the rubber lines that hook to the fuel pump.You replaced the pump,it's only $2 worth of rubber hoses.If they don't seal the pump can't pull the fuel,it's cheap insurance.

Posted on Jan 05, 2010

  • 14036 Answers

SOURCE: not getting fuel to carb, mechanical fuel pump replaced.

SOUND LIKE STOP UP FUEL LINE.OR SOCK IN FUEL TANK STOPPED UP WITH RUST AND DEBRIS.YOU COULD HAVE A WORN FUEL PUMP PUSH ROD OR CAM SHAFT LOBE WORN WHICH DRIVES THE FUEL PUMP PUSH ROD.

Posted on Apr 28, 2010

rjpoirier_nb
  • 166 Answers

SOURCE: 1982 Chevy K10 Fuel Problems

Check to see if timing belt is broken. or wiring to crank-shaft sensor and check sensor itself on front of flywheel typically but may be on side of block usually the further towards the transmission is Crank and closer to front is cam sensor.

Check relays by switching from others of the same numbers.
Crank-shaft positioning sensor is bad perhaps.
Remove plug under vehicle that leads to fuel pump and check for voltage when key is turned on. if voltage is there is either defective fuel pump, was put in wrong or is harness from that point to the pump.
try banging the tank with hammer as someone turns key on.
 check harness from fuel pump to where it goes into the body - remove from body plug and inspect.
Should be either and or both a fuel pump relay and fuse! 
Run 12 volts to the positive side of the fuel pump wiring to see if pump is good. 3 wires usuallly  1 is ground for both the fuel guage and the other positive for the pump. and other is positive for the fuel pump guage and these two wires for the guage will show some resistance. put a fuse inline with the 12volts to the fuel pump positive but cut the line to the body prior to this - temporarily.
Could be bad switch in ignition unit in steering column but doubtful.

Hope this helps.

Posted on Jun 09, 2010

  • 106 Answers

SOURCE: 1979 holiday rv chevy 454 no fuel to carb i replaced fuel pump filters fill carb with gas engin runs then no fuel to carb

if it has been sitting for a long time you may have to dis-connect the fuel lines at both the tank and the pump and blow air through to see if there is a blockage in the line. if that is clear then make sure all fuel hose's are in good condition and not collapsing from old age. if those are in good condition then there is a problem in the tank and it will have to be removed for inspection....

Posted on Jul 14, 2012

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