LT1-LT4 Modifications 1993-97 Gen II Small Block V8

95 trans am injectors not pulsing...

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Old 03-12-2011, 10:16 AM
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Default 95 trans am injectors not pulsing...

I have tried everything on this car but can't figure out why the injectors wont spray...the fuses are good. Could it be the opti? ? Has fuel pressure 42lbs when primed but will not start.has spark....just no fuel.
Old 03-12-2011, 06:14 PM
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have you checked for signal pulse at the injectors? you would need a "noid light" set to check this.

that is the first thing i would do is check for injector signal
Old 03-12-2011, 08:06 PM
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Check the wiring to your opti.
Old 03-12-2011, 08:42 PM
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Forgot to add, the low res from the opti is what tells the PCM where the cam is and it determines what injector to fire and when , no low res pulse no injector.
Old 03-12-2011, 10:14 PM
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Originally Posted by WS Sick
Forgot to add, the low res from the opti is what tells the PCM where the cam is and it determines what injector to fire and when , no low res pulse no injector.
added to my memory bank, thank you. high res is for the coil i take it?
Old 03-12-2011, 10:22 PM
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I checked them with the nous light...there getting signal...the opti only has 1000 miles on it....but it was from autozone came with the car
Old 03-12-2011, 10:26 PM
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Originally Posted by 67goatman455
added to my memory bank, thank you. high res is for the coil i take it?
Pretty much for that and the timing itself.
Old 03-12-2011, 11:08 PM
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Originally Posted by LeonbergerG
I checked them with the nous light...there getting signal...the opti only has 1000 miles on it....but it was from autozone came with the car
if your checked every one with the noid light and they all are getting signal, then they are either clogged/broken, or are getting no fuel to them


have you checked for fuel pressure at the rail?
Old 03-12-2011, 11:11 PM
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If you find the injectors or bad I can sale you a set of used stock injectors cheap.
Old 03-13-2011, 10:17 AM
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I ohmd all the injectors. There ok ....I'm going to check the rail next and see if its clogged
Old 03-13-2011, 10:49 AM
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Ok pulled the injectors.. they are spraying....I think the opti could be bad it has spark and fuel...but it wont fire.
Old 03-13-2011, 10:50 AM
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Plug wire order?
Old 03-13-2011, 10:54 AM
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There right ...
Old 03-13-2011, 10:55 AM
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Is the accel opti any good??
Old 03-13-2011, 10:57 AM
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Absolutely not. It's one of the worst, if not THE worst.
Old 03-13-2011, 10:58 AM
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no, not at all. chandlermotorsports seems to be the way to go these days
Old 03-13-2011, 11:06 AM
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I really can't spend 500 on this car to get an opti... remans are 120 but I'm sure there junk too....ill check out the Chandler ones
Old 03-13-2011, 11:10 AM
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The Chandler is only 135 bucks....ill probably order one then. Was about to run to Jegs and buy an msd
Old 03-13-2011, 11:20 AM
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There is no benefit with an MSD over a stock, cheaper AC Delco opti. The less expensive optis are hit/miss with reliability.
Old 03-13-2011, 01:38 PM
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Know anyway to test an Optispark To Know if it is bad??


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