20 Most Recent 1991 Chevrolet Corvette Questions & Answers


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1991 Chevrolet... | Answered on Nov 09, 2017

If you have good spark at the plugs then it is vacuum or fuel.
1 vac listen for hiss in the few min it runs
check lines for damage, splits, unhooked etc. don't forget under car and dash

2 check fuel pressure, check for fuel delivery to the cyl. remove spark plug crank and check small look for fuel. remove coil wire so it won't start on you.


1991 Chevrolet... | Answered on Oct 16, 2017

I hope this diagram is correct? At the relay, the relay has two sides, the load side carries voltage to the pump, that is the line that looks like it switches between D and E. The control side of relay is on the right, that side needs voltage and ground. The voltage comes from ecm, usually a green wire with white tracer. Did you check for voltage on that wire, engine cranking? Even though the fuel pump gets voltage through the oil pressure switch, does the vehicle start and run? If more than one problem, I'd have to check rpm signal and where applicable, security system.
I was just curious, engine cranking, you have spark at the plugs and fuel injector pulse?
fuel pump-rncaqa0mdy1o2xgf3mwom2ma-1-0.jpg

1991 Chevrolet... | Answered on Jun 19, 2017

If there is not fuel going thru Fuel injectors, then it won't start. You can buy NOID lights at any auto store to connect to Fuel injectors to see if there is a problem with Fuel injector module. Here how the NOID lights look like:


You plug these into the connectors of Fuel Injectors to check during cranking. If there is light then your Fuel iinjectore Module is Good.
Then there is a problem with the Regulator. Here how it look like.

1991 Chevrolet... | Answered on May 13, 2017

Try a full cooling system overhaul. completely flush the rad, check all hoses, frewh coolan of the appropriate type and to the correct concentratin. Bleed the system.check the thermostat is opening closig at the appropiate tem[erature and that the fan is running as fast as it should. The temp really should not ne that high I think. Also ensure the system is properly bled. If too much heat is generated your engine will die so it is important to deal with this issue

1991 Chevrolet... | Answered on Jun 04, 2015

Your Vette is notorious for clogged fuel filters and or bad fuel pumps.
I'm going to link a video to what i believe is the problem.

1991 Chevrolet... | Answered on Mar 18, 2015

39 pounds is not enough. Make sure the regulator is good, check for injector resistance

1991 Chevrolet... | Answered on Jan 29, 2015

No it won't do this. Vats is only for theft protection. But if you or they cut the wrong wire, that could kill anything. If you or they spliced wires, the A/C should still work.

1991 Chevrolet... | Answered on Oct 10, 2014

In the bottom corner bumper area...if so try going in ram air inlet besides it ..I fought one and ended up going that way after wasting time

1991 Chevrolet... | Answered on Sep 08, 2014

Very simple use a star key and loosen the two front bolts between the sun visor and windshield insert the key vertically (one on each side) next with same key loosen the back bolts above behind head (one on each side), and it comes right off. Sorry, I don't remember key size.

1991 Chevrolet... | Answered on Aug 04, 2014

Take out the air vents first the screws that hold the dash are behind them. Careful to keep track of the screws you will notice they are of different sizes. I'm just giving you what I can recall it's been a while since I removed mine for servicing, Hope it helps.

1991 Chevrolet... | Answered on Jun 07, 2014

Does it crank,Turn over? If not it probably is a problem called "heat soak".. the starter is hot just from engine heat and wil not function. If it cranks but will not start i would check to see if it is getting spark.. if not than check the IGN module in the distributer. Do not replace it until you have it checked, costly part, i think Orilly auto parts has a machine to check it.. Could also be a ign coil going bad.. (coil slight chance)

1991 Chevrolet... | Answered on May 25, 2014

Explain this problem a little more will help in proper solution. Is this fuel injected or carbureted. Can you hear fuel pump kick on when you turn key. Sounds to me like the fuel pump never shuts off if you have gas always coming out. Could be bad pump or the wiring going to the pump but i'm not sure because i don't know what type of fuel delivery you have.

1991 Chevrolet... | Answered on Apr 23, 2014

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