Hi guy's I have a 1991 LS400 that is giving me problems with a high idle. 1300RPMS
So far I have done the following:
1. Replaced EGR Filter/ Cleaned out EGR.
2. Cleaned IACV
3. Replaced IACV
4. Cleaned throttle body butterfly
5. Changed PCV:
6. Started tinkering with TPS.. It no longer idles at + or - 2000 RPMS but now a more manageable 1200-1300 RPMS. I have a new TPS coming in the mail today.. Any other possible ideas here?
My AC unit seems to randomly work also, I'm not sure if IDLE and A/C have anything in common here.