1995 Ignition module
Thread Starter
Instructor
Joined: Jan 2008
Posts: 118
Likes: 0
From: Austin Texas
1995 Ignition module
I have a few questions about the ignition module. How is this unit grounded? Through the heatsink unit or through the harness?
I took the unit to 3 different shops, autozone could not test it.
Advanced auto tested with a plug in device that failed it on all counts.
Oreilly's tested it with alligator clips (three in the plug, and a ground strap on the heatsink portion) this failed all tests as well.
Not sure which if any test was correct
The car began having hard start issues, and would stall out like the spark simply cut out. This continued for several months until it will no longer start.
If it has been sitting for several days it will start and run for 3-5 minutes before stalling out and refusing to fire again, simply cranking.
I took the unit to 3 different shops, autozone could not test it.
Advanced auto tested with a plug in device that failed it on all counts.
Oreilly's tested it with alligator clips (three in the plug, and a ground strap on the heatsink portion) this failed all tests as well.
Not sure which if any test was correct
The car began having hard start issues, and would stall out like the spark simply cut out. This continued for several months until it will no longer start.
If it has been sitting for several days it will start and run for 3-5 minutes before stalling out and refusing to fire again, simply cranking.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
It grounds to the engine thru terminal "C" of the four pin connector.
Term A - to ignition coil B+
Term B - to PCM
Term C - to enigine ground
Term D - to ignition coil
section 6D4-2 of the 95 FSM
Term A - to ignition coil B+
Term B - to PCM
Term C - to enigine ground
Term D - to ignition coil
section 6D4-2 of the 95 FSM
Thread Starter
Instructor
Joined: Jan 2008
Posts: 118
Likes: 0
From: Austin Texas
Going to have to get me a real field service manual lol
Sounds like the first place used the right connector to test it in that case. (4 pin plug as connected to the harness on car)
It failed every test on their machine, High/low rpm, reference signal etc.
Guess the module really is dead.
Sounds like the first place used the right connector to test it in that case. (4 pin plug as connected to the harness on car)
It failed every test on their machine, High/low rpm, reference signal etc.
Guess the module really is dead.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Codes 16 and 36 are both opti failures, low and high resolution respectively. Possibly a harness or PCM problem, but most likely, and highly likely the opti itself. Check the harness that runs to the opti from under the passenger side fuel rail cover first, if that is good then the opti has likely failed. Did it somehow get water or coolant soaked?
Thread Starter
Instructor
Joined: Jan 2008
Posts: 118
Likes: 0
From: Austin Texas
I replaced the computer, Opti harness, and the ignition module, at this point only the opti and the coil are left. Th ignition module tested bad on all counts though so that needed to go. and the computer had cooked the conformal coating off of it, so that went.
Thinking about going with the LTCC mod and a new opti.
Thinking about going with the LTCC mod and a new opti.
Thread Starter
Instructor
Joined: Jan 2008
Posts: 118
Likes: 0
From: Austin Texas
I actually found some really cheap optis on ebay, same stock as jegs/summit sells as a GM performance part replacement (PN 1104032)
here it is: incase anyone else needs one
here it is: incase anyone else needs one
