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Old 03-20-2021, 07:42 PM   #19
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Join Date: Jul 2014
Location: Oklahoma
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When I've run an engine that was misfiring, it wasn't shy about throwing codes and blinking the check engine light. Anyone know why this one wouldn't?

It ran after swapping the fuel pump relay, but that was also after sitting for several hours. Maybe the relay swap getting it running was a coincidence. (swap the bad relay back in for curiosity).

My advice is to check the oil filter (easy and decisive if there is bad stuff in there), then proceed as Blue62 advised. I'm still wondering if it sucked a bunch of oil in the intake from the AOS.

The car probably has just under 100,000 miles and had good care through it's history. No mods, a basic 1999 5-speed manual.
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Last edited by 78F350; 03-21-2021 at 05:42 AM. Reason: corrected typo...
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