Irratic Idle
Thread Starter
Heel & Toe
Joined: Mar 2004
Posts: 21
Likes: 0
From: Easthampton MA
Irratic Idle
Hey, I had a problem with the throttle position sensor, and replaced it.
The idle is better, but occasionally it fluctuates at stop lights and even stalls...
Any help...
'85 350 w/ 80K. Only mod is flowmaster mufflers. I'm thinking of new rotor, cap and coil, Accell or MSD? thanks...
The idle is better, but occasionally it fluctuates at stop lights and even stalls...
Any help...
'85 350 w/ 80K. Only mod is flowmaster mufflers. I'm thinking of new rotor, cap and coil, Accell or MSD? thanks...
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Irratic Idle (chonko66)
Use the method on my site to set base idle (450rpm) and then set the TPS base voltage.
If the problem persists, clean the IAC under the TB and the TB.
If the problem persists, clean the IAC under the TB and the TB.
Intermediate
Joined: Oct 2003
Posts: 42
Likes: 0
From: San Lorenzo Ca
Re: Irratic Idle (chonko66)
I am having similar problems with my 89 and I have checked on-line (ecklers, MADVET, CC, etc) for the IAC and the price seems to be around $70-$80. Where did you find one for the $28? Thanks
Thread Starter
Heel & Toe
Joined: Mar 2004
Posts: 21
Likes: 0
From: Easthampton MA
Re: Irratic Idle (89blkvet)
Hey, I found the TPS and IAC valve at my local parts chain; Advance Auto Supply. I was surprised that they had those parts "in-stock" . I'm in Massachusetts and don't know what parts stores you have arount the area. The IAC was really fouled up, but I kept it just incase the new one didn't work.... Good luck. :cheers:
Cruising
Joined: Jan 2004
Posts: 11
Likes: 0
From: South Elgin Ill.
Re: Irratic Idle (chonko66)
I had same problem 2yrs ago with my 93Lt1 . It would stall out on me at a light and it also had a eratic rpm range at idle. I replaced all kinds of sensors that didnt help. Reading through my owners manuel there was a little section in there that delt with this problem. Put your car in park, run the Rpm's up to 2500 and hold it there for 2 minutes. This clears out clogged O2 sensors. My problems where over. Try it , What do you got to lose? :beatdeadhorse:
