Rough idle, I mean like it's possessed

[Norge]

Hi All,

About 2 months ago my 99 Hoe (5.7, 4 wd) threw a P0507 - idle air control high.

I replaced the IAC valve, the PCV valve and finally today the TPS.

Just took it out this evening (been rainy & humid) and she died right after sputtering at idle in park.

Drove it a bit, stopped at a light and the idle was jumping all over the place. Oh yeah, it's still throwing the P0507...

Anyone ideas on what I should do next?

 

[adamabt]

i had this recently happen to my 2003 Tahoe. My mechanic could find nothing when he plugged in a code scanner. I Googled the issue and was directed to a youtube video of a guy using throttle body cleaner to flush out his throttle body to curer a similar issue on his Silverado. For less than 5 bucks and less than an hour i gave it a shot. My idle is now stable, i don't stall and the acceleration is remarkably better....worth a shot!