Can This Be True
Thread Starter
Junior Member
Joined: Sep 2003
Posts: 53
Likes: 0
From: HOUSTON TX
Car: 1991 GTA
Engine: 350 TPI
Transmission: AUTOMATIC
Can This Be True
After having problem's with my IAC, and TPS, both were changed
with new AC-DELCO part's. the car used to idle at 450 to 500
since the part's have been replaced, my car now idle's at 7.25
on one of those computer like scanners. I think that's kinda high.
It does show 700 on the tach. can this be true. the mechanic
sez that is what the bool's and scanner called for. as he showed
me. .25 above 700 or .25 below 700 is accurate. he also said
because my parts were old that might be why it idle low.
So know when i put it in gear it kicks hard. I also posted the help
please topic. it's the same car. 1991 GTA350 TPI
with new AC-DELCO part's. the car used to idle at 450 to 500
since the part's have been replaced, my car now idle's at 7.25
on one of those computer like scanners. I think that's kinda high.
It does show 700 on the tach. can this be true. the mechanic
sez that is what the bool's and scanner called for. as he showed
me. .25 above 700 or .25 below 700 is accurate. he also said
because my parts were old that might be why it idle low.
So know when i put it in gear it kicks hard. I also posted the help
please topic. it's the same car. 1991 GTA350 TPI
Supreme Member
Joined: Jul 1999
Posts: 1,366
Likes: 0
From: Atlanta, GA, US of A
Car: 94 Z28
Engine: LT1 w/ headers, catback, CAI, tune
Transmission: 4L60E
Axle/Gears: 3.23s
You talking about in park, or in gear? In park 725ish sounds about right, should drop down to 650ish in drive... 450-500 in drive seems too low, my 305 TPIs didn't even idle that low.
Supreme Member
Joined: Nov 2001
Posts: 4,456
Likes: 3
From: Ocean, NJ
Car: Check The Sig
<------ 305 idles around 500... not good eh? I guess i need to replace it. What is the average life for the IAC? I figure 16 years is plenty. Do I have to set the IAC if i replace it, or is it preset?
Supreme Member
Joined: May 2002
Posts: 4,099
Likes: 2
The first years of TPI did idle at 500 then it got changed to 600-650 (in park) And if you got a replacement prom from GM they had raised the idle to 650 on them, they said that at 500 RPM the engine wasn't getting sufficent oil to all the moving parts.
Supreme Member
Joined: Apr 2002
Posts: 1,148
Likes: 0
From: Faribault, Minnesota
Car: 1989 IROC-Z
Engine: LS1
Transmission: T56
Originally posted by Morley
they said that at 500 RPM the engine wasn't getting sufficent oil to all the moving parts.
they said that at 500 RPM the engine wasn't getting sufficent oil to all the moving parts.
350 now :hail:
Thread
Thread Starter
Forum
Replies
Last Post