1990 Accord LX Misfire Problem
Hi All!
My ’90 LX just developed a misfire problem today and I’m hoping someone may have some insight. 1990 Accord LX, 5-Speed, 127k miles. I’m no pro mechanic, but I’ve done most of my own work on my cars and motorcycles for the last 25 years. I definitely know my arse from a 12 point, 3/8" drive, Snap-On Flank Drive, deep socket. Anyhow, here’s the story... I replaced my radiator last week due to a small crack in the top tank. While I was at it, I also replaced the radiator hoses and the thermostat. I was very careful to put everything back in as it was supposed to be and the job turned out ok... no leaks and the car ran fine. Today, when I was getting off the freeway, (highway, for those of you outside CA) I felt the car misfiring/skipping, like it wasn’t running on all 4. It was not a totally constant misfire, through all RPMs and loads. Most noticably, it did it at low to mid RPMs, under medium load. The idle would fluctuate from normal to misfiring. I could get the car to buck pretty good at part throttle, 3rd gear, accellerating moderately. The car started back up ok after making a few stops too. No check engine light. I already took care of the obvious and changed out the cap, rotor, wires, and plugs, but no luck. All wires and hoses in the areas I worked on were also double checked... everything was connected and tight. When changing the spark plugs, a couple of them were only finger tight, but no signs of compression burn-by or anything like that. I gapped the new ones at .044", used some copper anti-sieze on them, and torqued them properly. Also possibly worth noting... there was some oil on the plug boots down in the holes and also a little bit in the very bottom of the distributor, but not really enough to worry about. So, the car continues to misfire. Is there anything obvious that I may be missing? What sensors are in the area of the lower/rear radiator hose that I may have knocked into and possibly should re-examine? Any other thoughts? TIA! -Joe |
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