Camry 2001 4 cylinder, with 200k miles.
This began at startup where it would not hold an idle, I cleaned the throttle and IAC and replaced
the upstream Denso air fuel sensor, because of an engine light.
I now have a pulsating RPM at startup from 400-600 RPM, there is a click click
noise near the drive belt area its moves violently.Even with the AC off.
After a few seconds and pressing on the gas it seems to clear up. When driving and stopping it
idles around 500 RPM at times. But seems to drive ok.
The car had timing belt changed about 2 months ago, they did not replace the tensioner.
Not sure what is going on, thought maybe a bad tensioner, IAC, EGR Valve, MAP, TPS. Can I rule any of
I have no engine codes. If I take it somewhere how easy would it be for them to find the problem
correctly, without just replacing parts at random?