Trying to troubleshoot my check engine light and misfire problems. (2000 LC with 327k miles)
I had a check engine light a couple months ago, P0300, went away after swapping in two new Denso coils. But a week and half ago, the CEL light came back, now with 4 codes according to my scanguage - P0300, P0301, P0302 and P0307. The LC idled kinda rough, vibrated at idle when in drive, slightly less with the A/C on. And I could smell unburnt fuel in the exhaust with the drivers window open. It would also sometimes take a while to crank if the engine was still hot.
First tried swapping around the coil packs again and even put in newer denso spark plugs in Cylinder 1 & 2. But the P0300, P0301, p0302 codes would come back within like 10 miles of driving.
Today I replaced the serpentine belt , the air filter and the P/N - 17030-50070 “idle up hoses”, cleaned the Throttle Body, the MAF sensor and left the battery unplugged for a while so that the ECM could reset.
I also checked the fuel injectors for resistance, all were between 14.6 - 14.9 Ω. So decided to check the crank sensor, and the top of it was completely covered in gunk..
I couldn't get the connector off so I just cleaned it up pretty well and reinstalled.
The LC took a couple trys to start. But after idling for a bit, the fuel smell is pretty much gone and so are the vibrations.. I drove about 40 miles doing errands and highway driving, without CEL coming back on.
If the CEL comes back...I'll probably look into rebuilding the Fuel Injectors and new crank sensor. If anyone might have other suggestions or tips, please clue me in.