1989 cutlass supreme 2.8 No start

[not a motor head]

The motor turn over with spark. I checked fule pressure (40 psi ) had it towed to a garage. He check it over. Called me back said it has to be electronic. The car ran when I parked it. Now it won't start. He also said no pulse to the injectors. But it's in time and good spark. Can anyone help please????

[maxwedge]

Very tough go diagnose this from here, both the ign. Module and ecu were bad in these cars. You could try tapping the ecu case firmly with a screw driver handle see what happens, the mechanic can't find the problem? All the fuses ok?

[not a motor head]

Yes the fuse's are good. I was also told that the crankshaft sensor could be bad. The mechanic said was there is no pulse to the injectors. He checked spark, compression, fule psi. Everything I already did. But his small hand computer said no pulse to injectors. And I didn't run across your suggestion. Is there anything else that would cause no pulse to injectors?

[Tech II]

If the injectors are not firing, there are 3 possibilities....

Bad ECM....

Bad ICM(no ref signal from ICM to ECM), or open circuit between ICM and ECM...

Bad injector or shorted wiring harness to injector.....this is a multiport system, not sequential.....if an injector is shorted or a wire harness to one of the three injectors(1-3-5 are in parallel, and 2-4-6 are in parallel in another circuit), this will be a huge current draw...the injector driver in the ECM will see too much current flow and and shut down the injectors......see this happen a lot when mice build a nest under the uper plenum, and they eat the insulation....

[juicypugh]

Can someone help me 94 oldsmobile ignition not sending signal to start help plz

[Tech II]

Start your own thread.....give year, make model, engine...

Give exact symptoms, and any recent work done to the car....