Hello all,

4Runner, 1993, RV6 3L, manual

A while back ago i took my rig to the mechanic to get a rusted plug replaced at the back of the cyl. head, so he had to remove all the intake system.

Now when I start it cold in the morning it idles at 1000 and as it warms up revs climb to 1500rpm and they won't come down unles I drive it for about half hour (it would then drop to around 1200).
When engine is warm, I shut it down and re-start it after 15-20 minutes and it would idle nicely at about 500-600 but in a matter of minutes rpm's would slowly rise to 1100 or 1200 and stay there as long as engine runs

*Idle speed screw is all the way in
*TPS screws still have original paint from factory
*I cleaned around the throttle plate without removing the TB and it looks like it's closing fine



Any advice or ideas would be appreciated
Thanks in advance guys

 

Sounds to me like either the air valve under the throttle body may be sticking or there is a significant vacuum leak.

 

I thought it could also be a stuffed temp sensor since the temp almost reached the red before all this started to happen

 

Yeah, thanks for the info fellas, it's good to be here