LT1 coil conversion

[1BADAIR]

Small bore ls7 is where al the fun is

[mustangmike6996]

A little update on my optispark issue...

So the timeline goes something like this:

2011- replace Opti and ICM (no spark)
2011-2014, mostly stored, some short trips every few months
2015- drive the car to work as a daily for the season
2016-2021 car is mostly being stored again with occasional trips
2022-present... No spark diag

For the diag, I followed the troubleshooting chart in the Factory Service Manual. Initially I had diminishing spark but could run the car on starter fluid (I'm assuming because it's more combustible than fuel). Eventually the spark completely quit. I replaced the ICM and coil with OE Delphi and AC Delco parts. No spark. Started the diag process all over from step 1. It calls out the distributor. Can't find a good/cheaper replacement so I go with AIPs sensor for $65 and replaced the opti extension harness with a new aftermarket parts (goes from the intake down to the distributor). Put it all back together and no spark... At this point I start the diag process again. Instead of pulling the opti connector I was pulling the intake side of it (it's easier to access and read voltage/gnd). I keep diagnosing the car, which now needs a battery but I use my jump box to aid the weak battery. I finally get completely fed up with the car and start back at step 1. Check for power at pin C, has power, check for ground at pin D, missing. Thinking I flipped the connection in the process, I reached and gave GND on pin A. I stop and ask WTF, is that harness pinned wrong....YUP, the new harness was pinned backwards.

So long story long, I transposed the pins and got spark. At this point the car is completely flooded (brand new plugs too). I come back today with a new battery and retest, got the car to stumble and start/stall etc. Eventually I got it fired up and cleared the overly rich condition.

Tomorrow I'll be reinstalling the water pump and letting it start/run and heat cycle a few times.

It's been a hell of a time with this.

[dave89iroc]

I do recall those jumpers being pinned wrong at times

[mustangmike6996]

I do recall those jumpers being pinned wrong at times

I contacted the company, they confirmed that they did have a bad batch and think they have them isolated.

I just reinstalled the water pump this weekend. The car fought me when trying to restart but eventually ran (poorly). I think I am fighting old gas and fouled plugs. I plan to swap the plugs some point this week if possible and retest.

When I did get the car running and up to operating temp the service engine MIL tripped. I jumped the ALDA and got code 26, quad driver fault. From what I dug up really quick, this is possibly a wiring issue to the purge valve, EGR or air pump... or ECM. I need to verify all of those circuits are ok. I am wondering if the harness that was incorrectly pinned caused any ECM damage.

[dave89iroc]

I contacted the company, they confirmed that they did have a bad batch and think they have them isolated.

I just reinstalled the water pump this weekend. The car fought me when trying to restart but eventually ran (poorly). I think I am fighting old gas and fouled plugs. I plan to swap the plugs some point this week if possible and retest.

When I did get the car running and up to operating temp the service engine MIL tripped. I jumped the ALDA and got code 26, quad driver fault. From what I dug up really quick, this is possibly a wiring issue to the purge valve, EGR or air pump... or ECM. I need to verify all of those circuits are ok. I am wondering if the harness that was incorrectly pinned caused any ECM damage.

I hated those quad driver faults, just so unspecific , good luck, sounds like you're getting close