MPFI 2.8 - Injectors not firing, Small things to check?
12-15-2017, 05:00 PM
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Car: 1988 Camaro Sport Coupe
Engine: The All-Powerful 2.8l!! :P
MPFI 2.8 - Injectors not firing, Small things to check?
Hey guys, I just rebuilt my original 2.8l injectors I had to replace my dying junkyard 3.1 injectors. All cleaned out, new filters, ohms show 17.3, click and spray fuel fine with 12v applied to them. I've thrown them in and ripped them out 3 times now, I refuse to give up on my car 
I just ripped them out again to make SURE they're spraying fuel and are not clogged, and they work fine. So either they were clogged internally and are now free OR all of a sudden I'm not getting injector pulse.
Car ran fine with the dying 3.1 injectors, what could've caused me to lose pulse all of a sudden? What should I check, especially fuses? Checked by bat and the ECM & Injector fuses
I just ripped them out again to make SURE they're spraying fuel and are not clogged, and they work fine. So either they were clogged internally and are now free OR all of a sudden I'm not getting injector pulse.
Car ran fine with the dying 3.1 injectors, what could've caused me to lose pulse all of a sudden? What should I check, especially fuses? Checked by bat and the ECM & Injector fuses
12-15-2017, 06:01 PM
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Car: 1988 Camaro Sport Coupe
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Re: MPFI 2.8 - Injectors not firing, Small things to check?
All the 2.8 injectors ohm and spray perfect, it'd be hard to believe all 6 are shot
12-15-2017, 08:12 PM
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Car: 1988 Camaro Sport Coupe
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Re: MPFI 2.8 - Injectors not firing, Small things to check?
Injector pulse is showing less than 2 volts, doesn't sound right?
12-15-2017, 08:29 PM
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Re: MPFI 2.8 - Injectors not firing, Small things to check?
Never mind, showing battery volt while cranking and the 1 second it'll run for...just doesn't make sense how the injectors test great out of the car and won't work in it...
12-16-2017, 12:18 AM
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Re: MPFI 2.8 - Injectors not firing, Small things to check?
welp, put old 3.1 injectors back in, Cheby fired right up. Guess my 2.8s were just duds and I've wasted 2 days discovering that
To anyone reading this in the future, buy new injectors!!
To anyone reading this in the future, buy new injectors!!
12-16-2017, 01:06 AM
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Re: MPFI 2.8 - Injectors not firing, Small things to check?
Nice to hear that you resolve the problem 
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