Q: Rich, high idle, odd shifts
My truck is idling really high...it runs fine til it's warmed up...it no longer does the closed loop warm up and is running really rich so I'm starting to think it might be o2 related...I've changed tps, iac, ect, and cleaned egr. No hose leaks that I can see. But shifts weird. It almost drops first or second it's hard to tell...all I know is it's aggravating because I've changed and fixed almost everything I can and still have the same result. The only way I can get it to run somewhat right at idle is with iac unplugged...I've tried two new ones and the old and the same thing happpens. So it's something I'm missing.
My car has 253000 miles.
My car has an automatic transmission.
It also won't go into overdrive. Just recently.
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