Need LT1 Genius! 95 Trans Am Backfire then No Start
10-22-2012, 10:38 PM
#22
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10-23-2012, 04:06 PM
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10-24-2012, 04:13 PM
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They are corresponding. Sparks and injectors are good. If the cam is at 9 OC TDC then wouldn't that mean its in time. There isn't evidence that the chain slipped or broke a tooth.
I feel like it's ignition timing. It blew smoke rings out of the intake after I let off the key as it was trying to start.
I've went through the whole ignition system. It's not firing at the right time. I'm left with either the opti or PCM. I know PCM failures are rare though
I feel like it's ignition timing. It blew smoke rings out of the intake after I let off the key as it was trying to start.
I've went through the whole ignition system. It's not firing at the right time. I'm left with either the opti or PCM. I know PCM failures are rare though
Last edited by oliverdeonarine; 10-24-2012 at 06:15 PM.
03-18-2018, 04:27 PM
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They are corresponding. Sparks and injectors are good. If the cam is at 9 OC TDC then wouldn't that mean its in time. There isn't evidence that the chain slipped or broke a tooth.
I feel like it's ignition timing. It blew smoke rings out of the intake after I let off the key as it was trying to start.
I've went through the whole ignition system. It's not firing at the right time. I'm left with either the opti or PCM. I know PCM failures are rare though
I feel like it's ignition timing. It blew smoke rings out of the intake after I let off the key as it was trying to start.
I've went through the whole ignition system. It's not firing at the right time. I'm left with either the opti or PCM. I know PCM failures are rare though
03-19-2018, 11:45 PM
#27
Had a similar instance. Got on it and hit the limiter and it backfired and died. Wouldn' Start again and could tell it was out of timing. Turned out the rotor fell apart in the cap. Rotor screws stayed intact but it is very common that if not locktited they can back out and cause these symptoms.
