vinny R

I have an problem with the car not running. I have had the problem 2 times now over the past 3 months. The car will turn over just fine but won't fire. The car runs great and it is a DD so i don't think it is mechanical. When it happens I have spark, fuel pressure and combustion, The injectors do not fire. I tested with a noid light and nothing, one quick flash when the key is turned and thats it. When I got to the 6th injector the light started blinking and the car fired up.
I pulled the distrubutor cap and from what I can tell the mechanical trigger for the injectors seams to be fine, no wobble of the shaft also. I ordered a new ICM, that looks to be the electrical part that sends the signal to the ECM.The plugs on the back were tight. I have checked ground wires and the seam to be tight. it usually just starts back up after anywhere from 10 min. to an hr so i don't think it is the ground. Last is the ECM itself. Could this be the source of a intermittent issue? if so would it be the unit itself or the plug in prom/calpack. I noticed they are sold seperatly. Could there be something else I could be missing. It is a 5.0 TPI engine.

Thanks for any help on this.

RBob

iTrader: (1)

Stock injectors? Coils are shorting out preventing them from firing. #6 injector is likely the worst. Replace the injectors.

RBob.

vinny R

Yes they are stock/original injectors. The coil you are talking about, is that the spark coil to the distributor or are there internal coils in the injector? Also what I meant by the 6th injector was that none of them were blinking on the noid light, it was just a coinsidence that the car fired up before I got done testing all of them.

RBob

iTrader: (1)

The injector coils are shorting. Once enough of them bring the total resistance low enough the ECM can't fire any of them. All 8 injectors are wired in parallel on the one ECM driver.

RBob.

vinny R

Thanks Rob. Do you have any recommendations on what injectors to use? My engine is stock with no mods. The smog pump has been removed and that's it.

RBob

iTrader: (1)

South Bay Injectors is a TGO sponsor and carries all kinds of Bosch re-man injectors. The fat body injectors are a direct fit:

http://www.southbayfuelinjectors.com...bird1985-1992/

There is also the narrow body injectors:

http://www.southbayfuelinjectors.com...l-injectors-8/

However they don't have the groove for the retaining clips.

RBob.