'96 fsm help
Thread Starter
Instructor
Joined: Aug 2004
Posts: 173
Likes: 1
From: Rumford Rhode Island
'96 fsm help
I can't afford the fsm for my '96 LT4. I'm hoping someone here would be kind enough to help me with some info. I'm told(though I find it hard to believe) I have a bad wirring harness or a bad pcm causing many, many opti replacements. In an attempt to save time and energy, not to meantion money, I'm looking for the bad wire myself. Now the opti harness is new so it's the pcm wire to opti harness I need to check. Anyone know which pin is opti? Is there a possible connection between the opti wires/pin and the MAF, Dealer says they are close and might be touching each other but I don't believe it. I assume the fsm says which pins are used for which systems. So if there is good connectivity to the pcm for all pins, I'm told the pcm is bad. I never did any electrical work before so any help or tips would be appreciated. I'd hate to have to sell it but that's next if I can't solve this issue. Thanks.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
dude... I will be blunt - you cannot NOT afford to get the FSM.
If you can afford constant opti replacements, you can afford $100.00 for the set - that's nearly retail ($120.00).
I have issue with the wiring arguement... IF there is a problem, I would check the harness from where the opti connects into the main trunk back to the PCM.
If you can afford constant opti replacements, you can afford $100.00 for the set - that's nearly retail ($120.00).
I have issue with the wiring arguement... IF there is a problem, I would check the harness from where the opti connects into the main trunk back to the PCM.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Can't afford FSM but can afford many, many optis.
Never done electrical work before, but can judge the dealer's hypothesized electrical problem to be wrong.
Save time and energy by fixing oneself something that one has no experience with.
A good start to fixing this would be to tell us what the symptoms are.
If you can't afford the FSM you can't afford the car.
Opti is connected to B2/B3/B14/B20 on the 94 PCM. Should be the same on a 96.
Never done electrical work before, but can judge the dealer's hypothesized electrical problem to be wrong.
Save time and energy by fixing oneself something that one has no experience with.
A good start to fixing this would be to tell us what the symptoms are.
If you can't afford the FSM you can't afford the car.
Opti is connected to B2/B3/B14/B20 on the 94 PCM. Should be the same on a 96.
Advanced
Joined: Sep 2007
Posts: 50
Likes: 0
From: lexington nc
In my 96 prelim service manual ($1.25 on ebay) I show the black connector (c2) pins 2,3,14, and 20 going to distributer also most likely cause(my experience) is at distibuter test connector (4 pin right side of the intake) , but i agree symptoms would be more helpful, ignition coils and modules have failed for years and are much cheaper than a distributer, unless your getting the distributer wet or the vent is damaged they usually last well past 60k.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
In my 96 prelim service manual ($1.25 on ebay) I show the black connector (c2) pins 2,3,14, and 20 going to distributer also most likely cause(my experience) is at distibuter test connector (4 pin right side of the intake) , but i agree symptoms would be more helpful, ignition coils and modules have failed for years and are much cheaper than a distributer, unless your getting the distributer wet or the vent is damaged they usually last well past 60k.
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