Hello,
I'm currently facing trying to troubleshoot a 95 Corolla which seems to ping and stutter (shake) on acceleration, I think it's alternating between rich and lean mixture (based on the dark deposits by tailpipe).
The pinging went away after switching to plus fuel octane, but it's starting to come back now despite that. The vibration in the engine during acceleration is so unusual that I was convinced that the (auto) transmission was slipping, until a transmission shop told me otherwise. It actually seemed to be happening only in 2nd gear, but I'm guessing that it has more with the rpm-load relationship.
I plan on changing plugs/wires/cap/rotor (even though I've changed them about 30K ago (platinum plugs, etc)... And then go through diagnostics on the coil and whatever else I can find in the Chiltons book...
Any other suggestions or does this sound familiar to anyone?
Thanks, Alex