Code 36
Thread Starter
Racer
Joined: Mar 2014
Posts: 253
Likes: 11
Code 36
So i finally installed my new bosch III injectors today and immediately my old hesitation under light acceleration was cleared up. I was so happy been chasing this issue for a few weeks. Went down the rode driving normal until up to temp and gave it a romp, pulled strong but about 5500 rpms it stopped pulling and backfired and immediately through a CEL. So pulled over and checked the code got code 36. Weird thing is car still runs fine, has no noticeable power loss and revs freely to 6k. Only think that has changed is it is now hard to start(spins about 4-5 times before cranking) whereas before it was instant. Unplugged battery to clear code and still remains as does the cranking problem...ANY IDEAS? BTW Opti is a Delphi Unit installed in 2012
Thread Starter
Racer
Joined: Mar 2014
Posts: 253
Likes: 11
Is there anychance its a wire or plug or something to or from the opti, like i said its a relatively new opti, and the car still runs great just hard to start all of a sudden and i cant get the CEL to go away. Only other time I ever had a bad opti was my 95 T/a and it ran like ISH and didnt throw a code?
Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
It is possible that the plug got disturbed or a wire got broken while changing the injectors. It is worth checking as they are in close proximity.
Last edited by bassackwards; May 11, 2014 at 09:05 PM.
Team Owner
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
Do you have the FSM? Just do the diagnostics for the code from the start. The connector at the opti could be culprit or the other end of the harness but to avoid chasing "WAG" just do the diagnostics from scratch. Joe, Jim, Bob. Phil and his cousin will be of little use.
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Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
I may be a Wild A$$ but I'm not guessing 
I have intimate knowledge of how optisparks work and in fact I seek out cars with opti problems and buy them. Thanks to my dealings with a certain vendor I have learned everything I can about how optisparks work.
His problem is between the ECM and the optical sensor but I'd start at the connector between the fuel injectors since they've been messing around right there.
I have intimate knowledge of how optisparks work and in fact I seek out cars with opti problems and buy them. Thanks to my dealings with a certain vendor I have learned everything I can about how optisparks work.
His problem is between the ECM and the optical sensor but I'd start at the connector between the fuel injectors since they've been messing around right there.
Team Owner
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
Thread Starter
Racer
Joined: Mar 2014
Posts: 253
Likes: 11
Additionally, can someone explain why the car still runs Great in all conditions? Wouldnt it run poor with a bad opti? Like i said the only issue is a SLIGHTLY more difficult start up? Is it maybe just the CEL doesnt wanna reset with a DCed battery?
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
........"Wouldnt it run poor with a bad opti?" ....
not necessarily.
...."Like i said the only issue is a SLIGHTLY more difficult start up" .....
typical with a code 36.
Just replaced my opti based on the same symptoms. Fixed!
not necessarily.
...."Like i said the only issue is a SLIGHTLY more difficult start up" .....
typical with a code 36.
Just replaced my opti based on the same symptoms. Fixed!
Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
First off check the backside of each wire going into that connector from both sides. Tug on them a little and make sure they are seated. I stuck straight pins into the backside and checked voltage while the engine was running to find a heat related opti failure.
Pro
Joined: Aug 2012
Posts: 663
Likes: 1
From: Nashville TN
Starting in 93 they used a flat 4 wire plug and each terminal is marked. I converted my 92 to a 4 wire connector when I bought the junk Petris opti. Give me a little time today and I'll look through my old pics.
This connector has ABCD marks on the terminals. I believe A is the red wire with the probe in it and B is the purple/white wire
This connector has ABCD marks on the terminals. I believe A is the red wire with the probe in it and B is the purple/white wire
Last edited by bassackwards; May 19, 2014 at 09:42 AM.