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.

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.

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.

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

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?

Check all ur wiring and components in motor and fuel injector

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

I’m happy to assist further over the phone at https://www.6ya.com/expert/richard_9a19ee73dfa4686a

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?

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

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

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.

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.