Question about 1991 Chevrolet Camaro

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I have a 1991 Camaro RS 305cu V-8. It will not stay running. When I give it gas it shuts off. I have replaced the fuel filter, the idle sensor value and it hasn't made a difference.

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Have you checked your fuel pressure? I would check this before you check anything else first. Could be a bad HEI module which is located in the distributor cap. You need to check spark at all plug wires and make sure you have spark to every wire. Assuming you have TBI (throttle body injection) you should have 9-13 psi fuel pressure or if you disconnect the fuel line and put it in a jug while turning over you should get one pint in 30 seconds. If you have PFI (port fuel injection) you should have 40 to 47 psi or 1 pint in 30 seconds. If you have injectors disconnect injector harness then turn your ignition on and check for battery voltage at each one of the injectors harness. Battery voltage should be present on at least one side of each injector. If for some reason you don't have battery voltage check for a blown injector power fuse. Not knowing if you have a carberated or fuel injection either one has a EGR valve and if there are problems there it could cause your car to run very rough and die out after startup. I hope some of these help but with out knowing what you have fuel wise it makes it a little harder to diagnose.

Posted on Sep 12, 2009


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91' camaro rs 305 is losing horsepower when im driving and engine lopes when in idel

HI. Engine loping at idle in a stock RS camaro will likely be caused by bad fuel injectors. The throttle body on your car has two large injectors and usually the drivers side will short out leaving the passenger side over-working. You can see this occuring if you remove the air cleaner lid and use a very bright flashlight to look at the spray pattern for both injectors. They should look the same roughly. There could be a vacuum leak at the MAP sensor hose, there could also be stuck open EGR valve as well, commonly there is a problem with the Engine Coolant Temperature sensor and wiring connector that may be the cause of your problem. As far as the vapor leak in the fuel system, check the fuel hoses near the gas tank and the smog canister under the hood for cracks or broken places. I have had to replace many fuel pump o-ring seals on these cars though. The spot where the fuel pump hanger mounts into the fuel tank has a large diameter o-ring that cracks and splits very commonly, also if the fuel pump was replaced, sometimes people don't quite get the seal to stay in place just right.

Aug 10, 2012 | 1991 Chevrolet Camaro

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Run it by any good parts store (Autozone, Advance, etc) if you can. Have them do an OBII scan (fault scan) Your computer tracks all pertinent faults and it will show what needs to be replaced. I can suggest a bunch of possibilities but it's easier to have scan done and save you $$$ and time instead of throwing parts at it.

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Really need to know!

Listen for the fuel pump when you turn the key to the on position. If you do not hear it thenits prob. bad.

Apr 10, 2009 | 1991 Chevrolet Camaro

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Starts but wont stay running

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Don :)

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