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Old Apr 9, 2015 | 07:21 PM
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Default injector drivers
95 coupe,starts and runs on about 3 cylinders for about 30 seconds then smooths out and runs on all 8 like someone threw a switch. Traced fault to intermittent ground signal from PCM injector drivers. Bought rebuilt from Cardone,same problem,sent both to Cardones rebuilder,same result, will run on 96 pcm (obdII) but sets mil. any ideas?
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Old Apr 10, 2015 | 01:33 AM
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It would appear that the fault is not in the PCM. You might have a problem with one of the injector fuses (INJ1 or INJ2) or a ground issue. Since each injector has its own injector driver it's unlikely that several of them act exactly the same at the same time.

See post #19 in this thread:

https://www.corvetteforum.com/forums...bank-fire.html
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Old Apr 12, 2015 | 05:29 PM
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Ohm the injectors, it sound like bad resistance in the coils.
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Old Apr 13, 2015 | 05:37 PM
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Default injector drivers
Originally Posted by Cliff Harris
It would appear that the fault is not in the PCM. You might have a problem with one of the injector fuses (INJ1 or INJ2) or a ground issue. Since each injector has its own injector driver it's unlikely that several of them act exactly the same at the same time.

See post #19 in this thread:

https://www.corvetteforum.com/forums...bank-fire.html
The INJ1 an2 are both good with clean connections,I added a ground strap to the exhaust manifold bolt, I own an auto repair shop and have actually watched the missing ground signal from the pcm
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Old Apr 13, 2015 | 06:12 PM
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If you have an injector that is going short to ground the injector driver overheats and shuts down until it cools. That's why I suggested checking the resistance value.
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Old Apr 13, 2015 | 06:38 PM
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Default injector drivers
Originally Posted by MrWillys
If you have an injector that is going short to ground the injector driver overheats and shuts down until it cools. That's why I suggested checking the resistance value.
All injectors ohm check within specs. when I put an OBDII computer in my car from a friends 96 the problems stop. I have sent 2 computers to SIA Electronics for rebuild and they do not work.I replaced the ground strap from the bell housing to the body with one to the exhaust bolt and have clean tight connections. Do I have a bad rebuild? what could I be missing?
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Old Apr 14, 2015 | 01:02 AM
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Check the injector resistance when they are hot. Sometimes they go weird after they warm up.
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Old Apr 22, 2015 | 03:12 PM
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Default injector drivers
Originally Posted by Cliff Harris
Check the injector resistance when they are hot. Sometimes they go weird after they warm up.
this is happening cold
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Old Apr 23, 2015 | 12:41 AM
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You didn't mention error codes. Have you checked for any?
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Old Apr 23, 2015 | 02:45 PM
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Default Injector drivers
Originally Posted by cliff harris
you didn't mention error codes. Have you checked for any?
dtc 18 injector circuit fault, i have been advised by more than one person that old injectors will overheat the drivers so i am trying a new set of injectors this weekend
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Old Apr 27, 2015 | 12:06 PM
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Default Injector drivers
Originally Posted by Neilakamike
dtc 18 injector circuit fault, i have been advised by more than one person that old injectors will overheat the drivers so i am trying a new set of injectors this weekend
Tried new injectors without positive results. Anyone with ideas about computer input?
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