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I have a rather lengthy post below about selling my car. Several good folks here made me decide to keep with it>
Well I worked with it for a few hours today. I was driving around, waiting for it to do its thing, and it did. I pulled over, hooked up the timing light, and sure enough the timing was retarded about 10 degrees and would not advance with the throttle.
I was able to turn the car off and restart, and it lasted long enough to get me back home. When I got home, it happened again. I tried wiggling every connection I could think of to maybe bump it back into its normal mode to no avail. All of my grounds checked good with my meter, and battery was putting out 13.99VDC.
As I walked away to get another tool, came back, it was normal again.
So what controls the timing? Is it solely the job of the ignition control unit? Or does it also use the ECU? The ignition control box is a rebuilt Programa unit. All of the pins have the sleeves on them. I also tried pulling the vacuum hose off of the diaphragm, but no change. I'm confident the ignition harness is in good shape, and I've even taken the new knock sensor I bought to my work and put it on the O-scope...looks good! Also unplugging the knock sensor has no effect as well. I've noticed too that when it is in normal mode(at 12 BTDC), and I try knocking on the exhaust manifold with a hammer, there is no retard in the timing.
What else could it be? I could really appreciate any advice on where to go from here. I could find nothing in search about this problem. Sorry this is so long, but hopefully someone will benefit from this one day.
Thanks,
Jack
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