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Discussion Starter #61
Got it. I frikin got it thanks to scan9495.

Coolant temperature sensor pigtail wires are bad. And it's not like I wiggled the thing a little to make it work, I had to really go around and around with them.

The car was going into open loop, as you guys are proficient in, and it would flood. Hence the issues I was having before and even last night when I started messing with the thing again. I had to flood clear it by holding it WFO, at which point it started right up.

Today I decided to take time and just drive it until it acted up. Stay close to home and just keep driving no matter what. Sure enough, I felt it go into the high idle mode at a stop and upon letting off the brakes and getting onto the gas carefully, I was able to get home and leave it running to get my laptop.

I plug it in, look at the data for the PCM, and apparently -12F degree coolant was flowing in my car. At that point I knew it was the coolant temp pigtail or the sensor itself. Jiggled it a good bit and the idle settled down and went back to running right.

I am glad.

My bad laptop battery made this a hard fix because I can't catalog when I drive. Anyway, it's fixed now.

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the coolant Temp sensor in the WP if open and it usually does because of it being miss handled the open circuit will trick out the PCM to indicate -40F ..wiring or a dropped sensor ..
 

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Discussion Starter #63
the coolant Temp sensor in the WP if open and it usually does because of it being miss handled the open circuit will trick out the PCM to indicate -40F ..wiring or a dropped sensor ..
I figure it's the pigtail.

Like several others, the wires have been tight and pulled on most of their life. That's a sure fire way to ruin connectors and their wires.

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