Motohead

Hello everybody, 2000 4Runner, SR5, 3.4 Auto, non-cali. I've read all of the p0171 threads, but am still a little stumped. So far I have done the following: Cleaned the MAF (with proper cleaner) Cleaned TB Changed fuel filter Checked 02 -Front and rear (checked resistance at ambient temp) Checked MAF (checked resistance at ambient temp, varies with airflow) The truck cranks about 5-6 times when starting, and idles rough when cold, hunting about 300 rpm. When warm, it idles at a dead steady 700 rpm. This makes me think it's not a vacuum leak... I'm not sure if it is down on power, the light came on reasonably soon after I bought it. Any other checks before I pull the trigger and buy an O2 or MAF, or both? Thanks for any suggestions, I want to get this problem behind me with winter rolling in. -Drew

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Kiroshu

Is it throwing codes? Cleaning stuff does not always fix it. They say not to clean the air flow meter at all or it may never read right again but since it didn't change anything with you, your prolly fine. Sounds to me like a TPS issue or coolant temp prob. Have you resently done any cooling system work? Make sure its full of coolant and that you bleed the system of all air. TPS adjusted properly?

__________________
My current:
1986 Toyota 4runner
SR5 EFI
4cyl 2.4L 22RE
5-Speed
242,000 Miles
95% Stock
__________________
(Still working on restoring her)

My old:
1988 Toyota 4runner
SR5
EFI
V6 3.0L 3VZ-E
5-Speed
302,000 Miles
All stock
(sold)______________
(Was my fastest truck i miss her...)

My old:
1989 Toyota 4runner
Non-SR5
EFI
4cyl 2.4L 22RE
Automatic
231,000 Miles
(sold)______________
(was my quietest and slowest yota.)