Hey all, new to the forums, I have a 89 Corvette that is a no start.

A little history.

The car was running rough and was hard starting. The plugs, wires, cap and rotor were replaced. Car ran ok, so I shut it off cleaned up a bit to find it wouldn't start. Took a look online to find that injectors are a common problem with a warm engine, ohmed the injectors to find 2 below 10ohms while the others were in the 16ish range. Replaced the 2 injectors and the car would start every time warm or cold.

Then, it stalled and wouldn't start no matter the temperature of the engine. I hooked a scan tool up to find the RPMs reading and impossible number something like 9x10^6 while the dash shows nothing. Took the distributor apart and ohmed the pick up, seemed ok at .805 kohms. So I figured if the pickup was working the ICM must of crapped out. Replaced it, but still nothing going.

Checked over my work from replacing the injectors, which was relatively simple. Couldn't find any pinched wires or anything. So I'm stuck.

Any help would be appreciated.

 

well, its pointless to replace 2 fuel injectors when all 8 are suddenly accessable. because when they are 205 yrs old the ones that are good today will fail tomorrow. Gaurenteed.
FIC sells the whole set for < $250 with all the gaskets and o-rings and the hot-line ph number that works days, nites, weekends. Bosch-III that are a huge step up from the mule-tic injectors that came in the car that are prone to failure and shorting.

Next, you have to check to be sure they are not shorted. This is bank fired inj system that can short in one inj and take out the whole bank. Its one inj circuit thats split into 4 plugs...actually its one split into 2 then 4....

4 fire at the same time. 1 fries..they all fail.

Check for gas in the oil and wet cylinders. That speaks to shorted inj or blown regulator.

Fuel pressure? Min of 40 at key on. and hold that. When cranking, close attention to the gauge needle will show you each fuel injector pulse as fuel is used when the eng is cranking. Pressure falls off until it fires when the dist tells the ecm to continue to run the pump.
Grounds? harness grounds on the block?

Pull 1 inj plug at a time and try to start,. go from one to the next. If its a shorted inj or harness it will try to start when you d/c the bad inj so it cannot kill the rest. It'll fire up on 7 cyl..even 6.
The ohms test only speaks to the inj ability to cycle..not about its spray or its flow.

 

I'll try this tomorrow. And to expand on the OP I had spark and fuel pressure ~40psi KOEO, I'll have to check fuel pressure again, but I definitely do not have spark since the stall. Hence the focus on the ICM/Distributor side of things.