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

ignition issues.."optispark"...????

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Old Sep 1, 2008 | 11:37 PM
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Default ignition issues.."optispark"...????

alright man heres the deal bros man i got this lt1 and ill be driving it and it basiclly feels like im in quick sand ..i mean i go to floor it and it just doesnt go anywhere untill i hit high rpm's...i just dont know what it is....anyone have any suggestions ...id appreciate the feed back im in desperate need right now...thanks ....
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Old Sep 1, 2008 | 11:50 PM
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May need to go into further detail, does it hesitate when you floor it or is it running fine and you just think the lt1's are slow stock..which they are lol..
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Old Sep 2, 2008 | 02:31 AM
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No lol, it was running fine until recently. When i hit the gas it starts bogging down and sounds like its running on 5 cylinders. It also recently started back firing quite a bit.
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Old Sep 2, 2008 | 02:36 AM
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I would definitely check the opti..how many miles on it..A4, M6, any mods to it etc
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Old Sep 2, 2008 | 02:53 AM
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are the plug wires arcing? what is the condition/gap of the plugs?
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Old Sep 2, 2008 | 03:20 AM
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how can i check and see if the opti is bad....140000...automatic...and no its just stock....plugs and stuff are good its just miss fireing like crazy...and it just wont go no where basicly ill floor it no response basicly ....it just sits there it takes forever to get up....
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Old Sep 2, 2008 | 03:36 AM
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you can do this test for the opti
http://shbox.com/1/4th_gen_tech2.html#opti_test
but i think its a little early for that test, seeing as how your car still runs. if your plugs and wires really check out, i would test the icm next.
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Old Sep 2, 2008 | 03:45 AM
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way to complicated for me lol ......i just need some ideas of what people think is wrong with it ...i cant get the codes pulled because i cant find anywhere that can check it because no one has an obd1 to check it with sense mine is a 94 wich is really gay and pisses me off...so i dont know what to do
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Old Sep 2, 2008 | 03:59 AM
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really it could be anything in the ignition system. i had the same problem earlier this year. my plugs gapped out at .07x, and my plugs wires were arcing so bad that i couldnt even start the car in the rain. what did your plugs gap out to exactly? and even if you could scan your car, i doubt it would really tell you anything other than that you have a miss. if it is your opti thats going out, its unlikely that it will trigger a high or low res code.
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Old Sep 8, 2008 | 05:47 PM
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i have no idea i just got the car so i mean i have not the clue.....but i switched my plugs on my optispark i got those in order so it really doesnt backfire anymore abut its still boggs down and stuf it has a big hesitation problem ....but other than that i really dont know
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Old Sep 8, 2008 | 05:54 PM
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on obd1 i though all you have to do is ground the a and b terminal on the diagnostic port under the dash to retrieve codes? the ses light on the dash will blink numerous times depending on the code number. My 92 gmc truck is that way, local parts store should have a little two prong tool you stick in the diagnostic port, then turn the key on but don't start it.
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Old Sep 8, 2008 | 06:45 PM
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might be the tranny..hows it shifting
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Old Sep 9, 2008 | 10:54 AM
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a really clogged cat could rob alot of power
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Old Sep 9, 2008 | 10:33 PM
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change out parts with known good parts from friend's cars. Like coil, o2 sensors, etc. you get the idea.
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