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11-17-2016, 03:48 PM
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#1
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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did my opti finaly die or could it be somthing else ?
monday night. got into my car ( 96 z28) drove to a store everything was normal. went to leave the store about 20 minutes later. and the car would start up but stall out/die as soon as i shifted into gear. tried for 10 minutes and kept doing the same thing. sat there for about a half hour waiting for a friend to come. he showed up and all the sudden the car fires up and goes into gear. half way home the car dies and won't start back up. went home about 15-20 minutes later went back to the car and it started up drove home fine. 3 hours after that drove the car to work then drove the car home after work no problems. had to drive my brother to his job. on the way home on the parkway it started to hesitate you could tell it just wasnt happy but made it home. later on that day i went out again. the car was driving fine no problems then all the sudden died.
i figured its eather no fuel or no spark. i ruled out the no fuel issue as i can hear my fuel pump working. so that leaves me to believe no spark. now before we all just point directly at the opti-spark. is there anything else i should look at or is this deff syptoms/signs of the opti taking a crap ?
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11-17-2016, 08:37 PM
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#2
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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Any stored codes? Does it stumble or just quit? A dying / intermittent ignition control module (ICM, mounted on driver side head below coil) has similar symptoms. I had similar issues last year where the car would randomly quit and left me stranded one time (crank with no spark, had to tow home). New ICM with heat sink paste and haven't had a problem since. I never had any codes.
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1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick 
2014 2LT Cruze 2.0 Turbo Diesel
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11-17-2016, 08:44 PM
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#3
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Lord of the rings / 10 Second Club / Meet Coordinator
Join Date: Aug 2004
Location: Millstone Township, NJ
Posts: 6,389
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I've never experienced opti failure but those symptoms were very similar to my ICM taking a dump. Bought a new one, spaced it off the head and the problem was solved.
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97 T/A Ram Air Convt
Forever dyno queen / 777rwhp 662 rwtq @ 17lbs / 10.2 @ 140
'24 Corvette Z06
'17 Sierra 2500HD Dmax
'17 Lex LS460
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11-17-2016, 11:04 PM
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#4
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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No codes.
Is there any way to test the icm ? That would be soo much easier to get to then the opti.
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11-18-2016, 01:54 AM
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#5
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Join Date: Jun 2016
Location: Millstone
Posts: 142
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Sounds like icm
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11-18-2016, 06:27 AM
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#6
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,370
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Some parts stores can test it. You should test it a **** load of times as they tend to fail with heat.
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11-18-2016, 06:33 AM
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#7
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,276
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wouldn't hurt to test fuel pressure either. could be your pump on its way out.
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2017 SS M6 - Mods: Nothing Yet.
2026 Tesla Model Y - lol
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11-18-2016, 03:20 PM
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#8
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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For all those who said icm. I think i owe you guys a beer at the next meet.
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11-18-2016, 03:25 PM
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#9
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Lord of the rings / 10 Second Club / Meet Coordinator
Join Date: Aug 2004
Location: Millstone Township, NJ
Posts: 6,389
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Sounds like its fixed.
Check this out if you haven't already. http://shbox.com/1/4th_gen_tech2.html#ICM_cooling
__________________
97 T/A Ram Air Convt
Forever dyno queen / 777rwhp 662 rwtq @ 17lbs / 10.2 @ 140
'24 Corvette Z06
'17 Sierra 2500HD Dmax
'17 Lex LS460
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11-18-2016, 04:02 PM
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#10
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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****. Might not have been the problem. Just went to go drive the car. And its back to cranking but won't fire. Wtf
I swapped out the icm. It fired right up. A little while later desided to take the car for a quick spin it drove fine. And now back to this.
Last edited by wrong generation; 11-18-2016 at 04:07 PM.
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11-18-2016, 05:05 PM
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#11
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,370
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Get a buddy and see if you have spark. Check fuel pressure. Spray carb cleaner in intake. Did you use thermal paste on the icm and heat sink?
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11-19-2016, 08:02 AM
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#12
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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Yes thermal paste was used. My mom is a computer tech so there is plenty of that around lol.
Just for the hell of it i walked out side this morning and the damn thing fired right up. But this time my check engine light was on. Po372.
Whats the cure for this code?
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11-19-2016, 08:27 AM
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#13
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,370
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Sounds like its the opti 
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11-19-2016, 11:12 AM
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#14
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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Most likely opti failure, how many miles are on it?
Check out this Shbox writeup on diagnosing the opti.
__________________
1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick
2014 2LT Cruze 2.0 Turbo Diesel
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11-19-2016, 11:16 AM
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#15
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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no clue how many miles are on it. it could be the original for all i know. the odometer had 251k miles on it when i bought it 3 years ago. im guessing iv put 20k+ in the 3 years iv owned the car. (odometer doesn't work)
funny thing is when i bought the car the guy gave me a brand new opti-spark saying the car needed it but i havnt had any issues in the last 3 years.
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11-19-2016, 07:55 PM
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#16
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12 Second Club
Join Date: Aug 2004
Location: West Milford
Posts: 8,373
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check the power/signal harness the goes down into the opti on the passenger side. i just had a similar issue and found the end of mine the plastic was all cracked off the plug and was full of oil/coolant/water. ordered a new one for 12 bucks and its perfect now.
http://www.ebay.com/itm/Vented-Optis...BXjiz~&vxp=mtr
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88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
06 GMC Sierra
07 Sublime Charger Daytona
12 Tahoe LT
17 Malibu LT
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11-20-2016, 02:22 AM
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#17
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,276
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Quote:
Originally Posted by maroman88
check the power/signal harness the goes down into the opti on the passenger side. i just had a similar issue and found the end of mine the plastic was all cracked off the plug and was full of oil/coolant/water. ordered a new one for 12 bucks and its perfect now.
http://www.ebay.com/itm/Vented-Optis...BXjiz~&vxp=mtr |
this
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2017 SS M6 - Mods: Nothing Yet.
2026 Tesla Model Y - lol
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11-20-2016, 11:47 AM
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#18
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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well after spending all day yesterday taking the car apart and putting the new opti-spark in. and then today putting the water pump and other stuff back on.
is there any way i could have put the opti in wrong ? thought it only went in one way.
its running like ****. i ether some how put the opti in wrong or got my plug wires mixed up.
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11-20-2016, 12:30 PM
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#19
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,370
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Its a lot harder on the pin drive vented optis and I don't think it would run if it was wrong. I would check, recheck, and check the plug wiring again. Very easy to mix up on these cars with the routing.
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11-20-2016, 12:41 PM
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#20
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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Quote:
Originally Posted by sweetbmxrider
Its a lot harder on the pin drive vented optis and I don't think it would run if it was wrong. I would check, recheck, and check the plug wiring again. Very easy to mix up on these cars with the routing.
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Lol adam. You say check the firing order like its easy. Any chance you could take a quick ride and help me with it? Your not that far lol.
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11-20-2016, 01:42 PM
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#21
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,370
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It is easy, go one by one. I'm on call so can't leave.
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11-20-2016, 01:59 PM
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#22
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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lol iv got that diagram loaded on my phone. but when you have things like a/c on the car and everything else in the way its a ****ing nightmare. would be easier if i had 2 people.
so far iv verified 6 as being correct. i have 2 more to do on the passenger side. had to remove the crank pulley to get to the ones on the passenger side. trying to figure out how to trace these last two.
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11-20-2016, 02:48 PM
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#23
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Stalker
Join Date: Aug 2004
Posts: 12,083
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Quote:
Originally Posted by wrong generation
so far iv verified 6 as being correct. i have 2 more to do on the passenger side. had to remove the crank pulley to get to the ones on the passenger side. trying to figure out how to trace these last two.
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If your down to only two, just switch them and see if it runs better
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11-20-2016, 03:40 PM
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#24
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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Ok all 8 plug wires are correct. So much for that being tge issue.
The two vacuum lines on the opti if i mixed them up. Would that cause it not to run right?
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11-20-2016, 04:02 PM
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#25
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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Here is a vid. Maybe you guys can tell me the issue based off the sound.
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