Quote:
Originally Posted by GH85Carrera
I had one pair of sensors that only lasted a few years. After those few years it was like the car was haunted. The sensors would read fine with a ohm meter when cold. Once they warmed up they would on occasion get flaky. I finally replaced them after every other test and that solved my problems.
Once removed it was easy to test them hot and one of them would cut out. It was weird. I was happy to throw them out.
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Thanks Glen. When I wondered earlier in this thread if I had a heat related reference sensor issue, I was thinking more along the lines of intermittent sensor issue vs sensor gap growing beyond 0.8mm spec.
FWIW, I replicated the issue yesterday and was able to ascertain the following... 1) thanks to Sal's fuel pump prime feature in his ECU, I could at least hear the pump running during every subsequent restart attempt and 2) I connected my Fluke up to cylinder 3 spark plug lead, to check RPMs, and it showed ~300 RPM during no-start / cranking. I assume the latter qualifies as "having spark."
Will confirm IAC valve operation and attempt starter fluid test next time.
FWIW, here's another thing, while the car is failing starting attempts and when it eventually starts, I smell something difficult to describe and, more importantly, something I've never smelled before in 30 years of being around cars. It isn't unburned fuel. IDK what it is. It's pretty pungent tho. After the car finally starts, the smell quickly disappears.
Anyone have an ECU breakout box I can borrow? OTC 3226, or the like? I'd love to take reference sensor measurements.