Question about Chevrolet Corvette

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82 corvette crossfire injection, engine cuts out, does this at any speed will not start again injectors spraying to much fuel.this problem is intermitent, car can run for up to 2 hours of highway running before problem accures or it can happen straight after start up from cold .we have exausted all our idears, we have replaced these items with new ones to no avail,ECU,Coil,ignition module,Fuel pump,Spark plugs & plug wire leads,replacement hypertech power chip,Temperature sender,throttle body rebuild kit,throttle body injector kit,fuel filter,new inlet gaskit set,checked for vacum leaks,new battery,please note all the smog pump gear had been removed before i purchased the car.we have run out of ideas any help appreciated thanks John.

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  • saffron john Oct 27, 2008

    Thanks will give that a try.

  • saffron john Oct 27, 2008

    thanks will try the foil & check sensor

  • saffron john Oct 27, 2008

    my Auto electrician has already checked the wireing,we need to know where the ECU receives its signal from, thanks SJ.

  • saffron john Oct 27, 2008

    hanks will check that out.

  • saffron john Oct 27, 2008

    The engine is covered in sensors witch one sends signal 2 ECU.

  • saffron john Oct 27, 2008

    am on second computer now with no change to car, still stopping instantly has to be electrical or would miss & stutter before stopping.I think computer is getting a bad signal from somewere ,dont know wich sensor to check.

  • saffron john Oct 27, 2008

    my ECU is in the battery box behind the drivers seat , will see if my Auto sparky has a OBDI scanner thanks.

  • saffron john Oct 27, 2008

    My wiring diagram is the same as yours I cant find the mass airflow sensor on the diagram where do I look for it thanks SJ

  • Anonymous Mar 23, 2014

    Car stopped running on highway and then no fuel is getting to the FI throttle body

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Please go to the crossfire injection forum to get some straight answers to the 82 corvette CFI system and how to troubleshoot it properly. There's a lot of misinformation given here, so much so, I don't know where to begin.

One thing is, the 82 corvette CFI does NOT have a MassAir Flow sensor system, it uses MAP and O2 mostly. The CTS sends a signal to the ECM telling it what the temp of the motor is and in turn the ECM controls the amount of fuel being dumped. On the older (orignal) CTS sensors, they have one wire and takes its ground from the threads. If any coorosion takes place, usually the CTS will report a cold engine and request lots of fuel.

To repair this issue, install one of the newer style CTS sensors that have two wires, one for signal and the other is ground.

Fuel pressure and vacuum leaks on any CFI motor play key roles. Set the FP to 14-15psi measured inbetween the TBs. The regulator is located on the rear TB and must be slightly moded to make it adjustable and can be done in a few minutes.

Posted on Mar 07, 2009

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On the top right side of the intake manifold lid, there are several wires that are grouped together and are grounded to the double ended lid bolt. If there is a bad connection there, both injectors will immediately start dumping fuel. Make sure the wire's ring terminals are clean and the nut tightened. Rather than just tighten the nut that holds them down, tighten the double ended bolt first, then tighten down the nut. This may not be your problem, but it is one of the problems your car could have.

Posted on Feb 14, 2009

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Your computer may be messing up..i think you can have it tested if not maybe replace it? might be pricy but if it fixes your problem it would be worth it

Posted on Oct 27, 2008

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Not a lot left to replace Is it possible the fuel pressure relief valve is intermitantly sticking closed?is your pressure relief vacuum controled as the diaphrams fail or a simple spring loaded type?Should be on the fuel rail.fuel pump relief unlikely Have you made sure the fuel return line is clear and no blockages?Injector pulse cosistantcy?

Posted on Oct 27, 2008

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Check all ur wiring and components in motor and fuel injector

Posted on Oct 27, 2008

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Http://willcoxcorvette.com/instructions/headlamp_and_wiper_small_parts_function_2.pdf MORE ANSWERS TO PROBLEMS

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A timming sensor controls the pulse to the injector , so if the pulse is to high you will need a test on the timming sensor , and if the sensor is good then the sending unit (PCM) needs to be replaced
have you tested the injector?

Posted on Oct 27, 2008

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Mass air flow sensors have been alot of problem with these engines

Posted on Oct 27, 2008

  • paul erickson
    paul erickson Oct 27, 2008

    if the mass air flow is ok here is the wiring diagram you can check if you need a larger image let me know i could email it to you


  • paul erickson
    paul erickson Oct 27, 2008

    with a thanks for trying rating i can not help you any further

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The ECU receives signals from many sensors, for example Mass Airflow sensor, several heating and temperature sensors, throttle position sensor, and more sensors and devices that control distribution, fuel, cooling etc.

The ECU is the main module that controls all this information, and depending on the model is located behind the glovebox, near to the firewall , or near to the engine.
If the ECU has already be replaced, then it should be scanned using an ODBI code reader like the some of ones here Obd 1 Scanner

Posted on Oct 27, 2008

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There used to be a known problem with earlier fuel injection where as passing near high power cables or other sources of electrical interference would cause the all the injectors to hold open flooding the engine and stall. so you need to check for screening wires to certain sensors .other than that wrap the engine control unit in tin foil to shield it from interference.also check crank shaft sensor.hope this helps.

Posted on Oct 27, 2008

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I am not personally up on vettes but if you contact Gary at thi link he is one of the best corvette guys I know of. http://www.profilecanada.com/contactus.cfm good luck.

Posted on Oct 27, 2008

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How do you bleed a diesel pump jeep Cherokee turbo diesel 3.1 5 cylinder 2001


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1987 cheverolet camaro will not start. Replaced a but load of parts...good spark , computer is new and working , fuel pump is new and working , distributor new and working , throttle position sensor new...


I think I would be looking at the crank angle sensor and/or the cam sensors on this vehicle.It seems to me the engine isn't getting the signal to fire up.What happens when you squirt some fuel into the combustion chamber ? If it fires up I would be looking at cleaning the injectors.If it doesn't fire up What's the pressure on the fuel rail. does it have a buy pass pressure valve on the rail.Some suggestions good luck

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I HAVE TO SPARY STARTING FUILD INTO MY 1990 CORVETTE BEFORE IT WILL START, WHY


Unfortunatly engine`s get addicted to easy start, the only way l have cured this problem is to completly strip out top end de-glaze cylinder bores, re-cut valve seats re-build with new head gasket set and never, ever use the stuff again!!!!!!!!!!!!! maybe of some use....

Dec 31, 2012 | Cars & Trucks

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My 92' corvette is hard to start. It cranks for about 5 seconds befor it starts. Replaced the coil, and the ignition control module. After it starts it has a slight smell of gas for a few seconds


I can almost promis you have bad fuel injectors. it is a known issue on your car, replace the injectors with a set of bosch series II injects from fuel injector connection get a flow matched set with viton seals ... hope this helps search google for fuel injector resistance test if you want to verify the problem you can also go over the injectors with a hair drier if it changed the way the engine runs its the injectors, the build more and more resistance as they warm up... until failure

Feb 27, 2011 | 1992 Chevrolet Corvette

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My buddy has a 84 corvette with crossfire


The fuel pump is in the fuel tank.The fuel tank will have to be removed from the vehicle to change the pump.let me know if this helped.

Jan 10, 2010 | 1984 Chevrolet Corvette

3 Answers

1991 corvette boggs down when normal operating temp is reached.No codes and have replaced the computer


It sounds to me as though you have a clogged or malfunctioning fuel pump. Depending on the engine in your car, and whether or not the engine has a carb or fuel injection system.

In most of the early 90's corvette's, there should still be a fuel filter on the fuel injection throttle body (it looks like a carb), and a fuel filter under the car on the fuel lines. I believe you'll want to check the passenger side, but follow the fuel lines to find the filter. You might only have one under the car, so don't be alarmed if you don't find a small one on the throttle body.

Try changing your fuel filters first, as this is an inexpensive way to make sure your vette is in optimum condition before you do anything else.

If fuel filter replacement doesn't work, you will want to have your fuel pump tested. The only way to DIY, is to remove the fuel pump from the lower drivers side of the engine and to blow in the "in" side with a little water and see if it puts out the fluid. Even at that it could still be bad, so if you pull the pump, plan on replacing it.

The only other realistic option is that your fuel injectors are dirty or the gaskets are bad and it is time for an injector overhaul. This is not to hard to DIY, but does take patience and attention. You can also try running some fuel injection cleaner through your engine before trying anything else to see if it helps.

Some unlikely options are that your smog pump is clogged, your catalytic converter might be bad, you EGR valve or Purge Valve is clogged, your timing is off and you need to check the spark system, or that you could have low compression.

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