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

What are some signs/symptoms of your opti about to go out?

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Old 07-21-2006, 06:59 PM
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Default What are some signs/symptoms of your opti about to go out?

Can anyone give me a list of signs of your opti going out because it seems as if mine is about to go out.
Old 07-21-2006, 07:04 PM
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mine had a bad high rpm miss when mine was crapped out
Old 07-21-2006, 07:44 PM
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not to be an ***, but do a search before you post this up.... this post has been posted within the past week im sure.... there are plenty of other threads with these answers...
Old 07-21-2006, 09:24 PM
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Originally Posted by harvickgm
not to be an ***, but do a search before you post this up.... this post has been posted within the past week im sure.... there are plenty of other threads with these answers...
True, but doesnt mean we can't help.
_________

My bro's opti made his Z28 stutter at about 1800-2200 rpms.
A malfunction opti will usually cause some kind of misfire, or timing issue.
They are the center piece of the LT1's timing.

I've heard of all types of side effects from the opti, but make sure you eliminate all possible options, like the ignition module, wires, plugs, and have the PCM checked.
Then if all else fails, get the Vented MSD and go to town.
Old 07-21-2006, 10:57 PM
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like i said i wasnt trying to be an ***...but we answer this same thread at least once a week... that and cam threads... it just gets old sometimes....

anyways... mostly its a high RPM miss.... mine though was a low idle stumble, at take off from my M6... it does vary..... but the no start is the most common....lol...
Old 07-21-2006, 11:04 PM
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whats an Opti?
Old 07-21-2006, 11:07 PM
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Originally Posted by TwoFast4Lv
whats an Opti?
hehehehehe.... i had to read it again thinking you were serious then i recognized ur name.... you had me going there for a second... LOL...
Old 07-22-2006, 12:10 AM
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Originally Posted by harvickgm
hehehehehe.... i had to read it again thinking you were serious then i recognized ur name.... you had me going there for a second... LOL...
LOL sorry man I read this damn thread..the ten gozilianth..and could not help my self
Old 10-05-2007, 09:37 AM
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why be an *** and dont help someone, the search on this forum sucks. the time it took you to post your criticism you could have answered his question.
Old 10-05-2007, 11:06 AM
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mine crapped out at 4500 rpms on a full throttle run and then shut off...thats how i knew mine was gone..pulled it off and the thing destroyed itself literally on the inside
Old 10-05-2007, 02:35 PM
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my car just wouldn't start.

Boz
Old 10-05-2007, 08:27 PM
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reading this i fear my Opti is ****..its been misfiring for...lol..3 years..never drive it : P but its really bad from about 4500+ car starts struggling and coughs : ( and i'm only getting 200 miles to the tank..I think its time for a full tune-up!
Old 10-05-2007, 09:22 PM
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Well, the best sign I had was that my Z stopped in the middle of the freeway!

Actually when all THREE of my optis went out, I at least had some hesitation and a SES warning before they quit completely.

A bit of advice if you're going to replace your opti...do a search...I recommend a REAL AC/Delco replacement, unless you're really into doing things more than once or twice.
Old 10-06-2007, 09:08 AM
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Well my car didn't throw any SES codes, it just started running like ***. The higher rpm you went the more it would miss. At idle you could hear it just slightly off, and then as the rpms would rise it would progressively get worse. Like fire coming out off the tailpipes worse.
I had just got my cutout on and was making some WOT runs from stop signs for my friends in the car, all of a sudden cough cough studder, then it started missing, no real warning for me, just **** out.
Old 10-06-2007, 09:14 AM
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my 94 formula... would randomly die out, then turn back on... SES light came on, Low and high res signal failure... then one day it died out and never turned back on rust covered opti!
Old 10-06-2007, 10:57 AM
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Originally Posted by TripleWhite96
reading this i fear my Opti is ****..its been misfiring for...lol..3 years..never drive it : P but its really bad from about 4500+ car starts struggling and coughs : ( and i'm only getting 200 miles to the tank..I think its time for a full tune-up!
I have a tune up and I can't get more than 200 out of it! I believe it just needs a tune really bad since I removed the EGR AIR race LTs and ORY. But also because of my junk BMR 2400rpm TC is **** and doesn't lock up i believe. Should have just thrown the stocker back in when a swapped trannies...


But to answer the question; my car started giving me problems anytime it went near water, rained, the humidity rose or someone sneezed on it. Half the time to get it to start at all I would half to put my foot to the floor and turn it over a bunch of times, then it stumbled usually at idle (enough where it sounded like I had a big cam) and smoke a lot. It would cutout for a sec without warning when driving. Here is a video of my cell (so quality kinda sucks) with stock manifolds dumped into only the 3in IM and out:
http://s136.photobucket.com/albums/q...80906_1718.flv
and when I replaced it this is what it looked like inside:
Old 10-06-2007, 11:13 AM
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yeah thats water. that optical sensor is very sensitive. :O rust is its enemy
Old 10-06-2007, 11:50 AM
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After looking at the guts, I don't even know how the damn thing started! It must be using that new technology that GM is developing with the Homogenius Charge Combustion engine where it doesn't use spark. My 1994 must have been GMs initial attempt at it!



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