Question about 1994 Chevrolet C1500

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My 1994 chevy truck .started jerking ,running slow .and rough like it wasnt getting gas. i looked at thefuel at the carb and it seens its working. i had problem with the fuelsystem .I hit the gas tank and it would thke off again. now it starts but it dont run can you help.

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Replace fuel pump and fuel filter.

Posted on Jun 27, 2009

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Car speed slows down and speeds up runs a little rough when speeding back up it does a jerk.


Dear Debbie,
Fuel filter costs about $ 20 plus installation, catalytic converter about $100 up to $ 600 plus installation..
Go for the fuel filter first.
If it is not that, do a diagnostic check before you do the catalytic converter.
The "cat" seldom is the problem.
God bless your efforts.

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does it run rough after warm up??or cold too,,u mite have a vacuum leak,,,take some injection cleaner spay,,carb or brake cleaner spray,,seen many different spays used,,,but spay around air intake,,around base,,see if engine will stumble,,also seen temp censer problems,,where its tell the ecu that the motors cold,so it rich-ens the fuel,,injector,,hoped it helped,,

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Have you checked the temp sender? If the computer does not know the engine is cold it won't put enough fuel into the mixture to get it started.
If after starting it by priming, if you can get it to run, I'd look there.
Also on most systems the crank sensor will play a part in there as well...If the computer does not see a signal from there it will often shut down the fuel pulses to the injectors.
If simple testing does not show you anything, have a code test done and see at least which systems are showing faults and work from there. Chiltons and Haynes list individual component tests you can do to isolate a single component.

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1 Answer

My question is this I have a 1983 toyota pickup truck with the 22R engine.About a week ago I pulled out ot my drive way and when the motor warm up it started to run rough and black soot was coming from my...


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adjust your carb, the 2 screws on each side of the carb adjust so you can get the car to idle correctly, also check your distributor

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Resently ran out of gas now cars running bad / 93 caprice


Change the fuel filter again and if you have fuel injectors, you need to get them sleaned....I believe some of those oil one stop service places will do it. If you have a carb, you need to blow it out....but change that filter....maybe even a few more times if you had that stuff come out the first time.

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buy a couple bottles of gas line antifreeze and add them to your tank.... each time you fill up add one to the tank

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Rough idling sluggish acceleration


These 4.3L W motors are common for fuel leaking inside the plenum causing them to run rough and smell like raw fuel. The fuel pressure regulator leaks internally, also the injector spider leaks and the two fuel lines feeding the fuel to the spider. You have to remove the plenum and look for the clean spot. Where the fuel leaks it cleans the oil off. Before you try this check your EGR valve. The EGR valves on these get stuck open with carbon and cause a rough idle. Remove it and look for the plunger it is a small round piece that you can push in and out, make sure it closes fully. You can also clean it with carb clean and they make a replacement gasket with a screen in it to keep chunks out of it. Start with the EGR because it is easier. The parts for under the plenum are available at most any parts store. If you have any problems just ask, and if you can not find the parts I will give you part numbers. Let me know what you find I will be back tomorrow.

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Help w 1994 chevrolet truck


This injector set-up needs a specific fuel pressure supplied to the fuel rail to even start, much less run properly. The fuel pump is immersed in fuel inside the gas tank to keep it cool and not burn up. Running the fuel level low causes more heat in the pump and interuptions in proper fuel pressure. AC/Delco pumps have proven to be a reliable fix, the aftermarket pumps only last for a month or two sometimes. Check fuel pressure under the hood and power and ground to fuel pump at electrical harness at top of gas tank. This truck needs a fuel pump.

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