Be a hero, Help a disgruntled man :P (ignition probs)
11-08-2009, 11:30 PM
#1
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Join Date: May 2007
Posts: 87
Be a hero, Help a disgruntled man :P (ignition probs)
Well I finally made it hope a trip which should have taken 5 mins took 5 hrs...
The Problem...
I have a 95 Camaro LT1 It is modified pretty well..
Cold start Runs amazing and for 5 miles it will continue... after that time... The car will Die.... tac will sometimes jump crazily right after car has died...
When i try to start the car.. It won't..... If i let it set for 5 mins... it will run for another few minutes.... Repeat this cycle till you get home
I replaced the msd blaster coil... problem remains
Replaced the ICM ..... Problem remains
Usually i don't come begging for help but now i am... I need some other troubleshooting ideas... I don't feel like getting stranded 10 more times...
I do have a 6al box... Thanks for your help guys...
Jaron
The Problem...
I have a 95 Camaro LT1 It is modified pretty well..
Cold start Runs amazing and for 5 miles it will continue... after that time... The car will Die.... tac will sometimes jump crazily right after car has died...
When i try to start the car.. It won't..... If i let it set for 5 mins... it will run for another few minutes.... Repeat this cycle till you get home
I replaced the msd blaster coil... problem remains
Replaced the ICM ..... Problem remains
Usually i don't come begging for help but now i am... I need some other troubleshooting ideas... I don't feel like getting stranded 10 more times...
I do have a 6al box... Thanks for your help guys...
Jaron
11-09-2009, 08:38 AM
#6
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Join Date: May 2007
Posts: 87
I dont think the check engine light ever turned on..... What should I look for Mike... I'm not a opti master.... But i've heard horror stories
Speedy Im curious what will this test... what will i accomplish by unplugging a o2?
Sconley I replaced the ICM with a brand new one and the same exact symptoms happened... Now if we can narrow it down more... trought test or ect.. I could get a replacement
Any more input and actual test procedures would be appreciated!
Speedy Im curious what will this test... what will i accomplish by unplugging a o2?
Any more input and actual test procedures would be appreciated!
11-09-2009, 10:13 AM
#7
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Join Date: Oct 2008
Posts: 300
Happend to me it turned out to be a bad opti. The car would only start when it was cold and it ran fine then it would die and wouldn't turn back on unless it sat for a little while. I changed so many things till i changed that again i changed the coil plugs plug wires. The way you are describing it sounds just like mine. The check engine light never came on either and no codes. Also what might help would be to check the spark and if you have a scan tool that shows live time just let it run till it dies and see what failed.
Last edited by Drew24; 11-09-2009 at 10:17 AM.
11-09-2009, 10:42 AM
#8
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Join Date: Jul 2004
Location: MI
Posts: 1,174
I have been replaceing an Opti with similar symptoms. Runs great down the road (97ss 383 D1 MM6) untill 15 miles and up to temp. Not over temp since I run Evans waterless with coolant media temp 160* or less. Car quits. Very dangerous since I loose the pwr_stearing (brakes OK since they are electric vac_boost). Anyway, open the hood, apply finger load to the opti connector, engine fires and runs good. Down the road again, and it happens again. Apply finger load to the connector and engine fires/ runs. Well, some would say the connector does not have full encoder pin engagement. No, not the problem. Electrical harness has an open... No, rings tru even under flexing. Dirt? No, I run and external Vac pump, so no oil.
I have a brand new Summit opti_2 dist 1.2 years old. I think the encoder has an intermitant open under heat. I have changed the opti now. No problems @ 1+ week. I think there are alot of low quality optical encoders being mfg in china or bang_besh (whatever). Summit does not want to refund/ replace since it is 1+ year old. I have @ least 6 opti's/ parts w/ 4 bad encoders. All I need is to find a source for the optical encoder, or make my own.
Hope this helps. B.
I have a brand new Summit opti_2 dist 1.2 years old. I think the encoder has an intermitant open under heat. I have changed the opti now. No problems @ 1+ week. I think there are alot of low quality optical encoders being mfg in china or bang_besh (whatever). Summit does not want to refund/ replace since it is 1+ year old. I have @ least 6 opti's/ parts w/ 4 bad encoders. All I need is to find a source for the optical encoder, or make my own.
Hope this helps. B.
11-09-2009, 10:51 AM
#9
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Join Date: May 2007
Posts: 87
Happend to me it turned out to be a bad opti. The car would only start when it was cold and it ran fine then it would die and wouldn't turn back on unless it sat for a little while. I changed so many things till i changed that again i changed the coil plugs plug wires. The way you are describing it sounds just like mine. The check engine light never came on either and no codes. Also what might help would be to check the spark and if you have a scan tool that shows live time just let it run till it dies and see what failed.
I had a feeling the opti was to blame...
Drew... Is this a direct replacement for mine??
http://cgi.ebay.com/ebaymotors/92-94...d=360119667093
Anytips for replacing a opti.. this is my lost zone i always had my tuner mess with the opti... when replacing how do i know how to line everything up? My tune and timing is perfect now.. I dont want to mess it up.. Any Opti replacement tips are welcome
Thanks!
11-09-2009, 12:10 PM
#12
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Join Date: Oct 2008
Posts: 300
Typically you don't want to buy the cheapys on ebay because they are mostly defective at least thats from my experience i made that mistake once and wasted 150 that could have gone to ac deco from gm. Some people on here have gotten them and they worked but its a guessing game that it might not so i would suggest going on summit.com or going to the dealer your looking to spend about 250 or so on it. But the install is pretty cut and dry just make sure you label the spark plug wires in the order you take them off and whats going to have to come off is the intake bs and water pump along with the harmonic balancer and a couple of other things like the air pump and coil
11-09-2009, 01:32 PM
#13
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Join Date: Aug 2006
Location: Orem, UT
Posts: 1,497
Runs great down the road (97ss 383 D1 MM6) untill 15 miles and up to temp. ... Anyway, open the hood, apply finger load to the opti connector, engine fires and runs good. Down the road again, and it happens again. Apply finger load to the connector and engine fires/ runs.
I think the encoder has an intermitant open under heat.
I think the encoder has an intermitant open under heat.
The wiring is a very common point or failure. If you loose the low-res feed, the engine will die. I still say over 90% of the time the opti is NOT actually the problem.