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Had a good day of troubleshooting, not to mention acquiring another car. (More on that later!)
If you saw yesterday's post, I was trying to solve a no-start, no-spark problem. I thought that I killed the ignition module by grounding out the negative side of the coil. After I tried that, I found I had 7.5 V or so at the coil, but 12V when I unplugged the module.
I was kind of up against a wall with my own troubleshooting, and I had previously measured a changing resistance at the dist harness (module end) prior to removing the connector at the distributor.
Well anyway I found a local shop with a good used ignition module, bought that (thanks European Auto, East Lyme CT). Brought it home, plugged it in, nothin'.
Well, same results anyway.
I doubted I killed two of them, but things were pointing to the distributor. OK, well they aren't fun to get out on a typical 240 but a bit of PB Blaster (your best friend) and sure enough it came loose. Lucky I guess.
WEnt to turn the rotor and found... it only goes a quarter turn. Or at least only goes that far, then the reluctor fingers on the rotor hit the poles in the case. So the fingers spin on the shaft as it's cranked. Weird. See the picture- sorry it came out fuzzy. I must have caught it somehow with the weird offset screwdriver I used to get the connector clamp screw out of the side of the casing.
Bent the finger the right way, plugged it back into the block, cranked it up and ZAP ZAP ZAP, I got spark. Put it all back together, set the timing, and I think it runs better than before.
Thanks again to those who offered help and support! I guess that'll teach me to fiddle with things.
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Rob Bareiss, New London CT ::: '87 244DL/M47- 230K, 88 744GLE- 220K, 82 245T-181K Also responsible for the care and feeding of: 88 745GLE, 231K, 87 244DL, 239K, 94 855GLT 189K
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