Having a little problem with a minor misfire around 2500 rpm no misfire under heavy load or acceleration that I can notice.
New spark plugs and 02 sensor change the 02 sensor for a hesitation under slow acceleration and solved the problem but not the misfire. EGR valve tested ok and if that was the problem I guess I would have some other problem.

Spark plug wire and distributor measured and look ok and I think if this was ignition related I would have problem under heavy load and acceleration.
When I think about it I guess it could be a bad ground some where.
Any thought around the problem is welcome do not ask me what car it is.
Because it is a Toyota 1992 3s-fe engine with a distributor with build in ignition coil and igniter, and EFI injection and EGR valve and modulator.
I have reading this forum for 12 years when i bought my E 320 W124 and there is a lot of experience guys around here whre I can't find somewhere else.