idleing at 2,500 rpm
04-19-2007, 01:49 AM
#1
Senior Member
Thread Starter
iTrader: (6)
Join Date: Sep 2001
Location: Richmond Hill, GA
Posts: 633
Likes: 0
Received 5 Likes
on
3 Posts
Car: They all sit.
Engine: LB9,LB9, LS1, LT4, LT4
Transmission: T5, T5, 4L60, T56, T56
idleing at 2,500 rpm
What could be causing my car to idle at 2,500 rpm? bad sensor somewhere? I'm not getting any codes.
04-19-2007, 03:43 AM
#2
Supreme Member
iTrader: (4)
Join Date: Nov 2005
Location: Sacramento
Posts: 1,946
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 RS
Engine: 350 TBI
Transmission: WC T5
Axle/Gears: 3.42 Posi
Re: idleing at 2,500 rpm
No obvious vacuum leaks or something crazy like crap blocking the throttle open? Is your SES flashing when you start the car to let you know all is good?
Also, I'm not sure at what idle speed the Idle Air Control valve is maxed out at, but 2500 sounds about right for something like that to be happening, like something is causing it to stick wide open. Maybe it needs to be investigated, wiring checked, valve cleaned, tested if possible, and maybe replaced. It could be other things so post back what you find.
Also, I'm not sure at what idle speed the Idle Air Control valve is maxed out at, but 2500 sounds about right for something like that to be happening, like something is causing it to stick wide open. Maybe it needs to be investigated, wiring checked, valve cleaned, tested if possible, and maybe replaced. It could be other things so post back what you find.
04-20-2007, 03:42 PM
#5
Re: idleing at 2,500 rpm
the vac lines are attached to the TBI. check for cracks or detached.
spray the base of TBI at manifold and the TB shaft where it exits TB on each side.
I believe you can look into the TBI init to see if the IAC is moving and seated. I think it moves at key on and would be nearly seated at fully warm idle.
spray the base of TBI at manifold and the TB shaft where it exits TB on each side.
I believe you can look into the TBI init to see if the IAC is moving and seated. I think it moves at key on and would be nearly seated at fully warm idle.
04-20-2007, 05:46 PM
#6
Member
Join Date: Apr 2006
Location: San Jose, CA
Posts: 108
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Camaro RS (w/Z28 tags)
Engine: 305CID TBI
Transmission: Manual - T-5
Axle/Gears: Stock
Re: idleing at 2,500 rpm
When I had my IAC out and started up the vehicle, is was idleing at 2500-3000rpms. So thats a possiblity like stated above.
04-20-2007, 06:04 PM
#7
Senior Member
Thread Starter
iTrader: (6)
Join Date: Sep 2001
Location: Richmond Hill, GA
Posts: 633
Likes: 0
Received 5 Likes
on
3 Posts
Car: They all sit.
Engine: LB9,LB9, LS1, LT4, LT4
Transmission: T5, T5, 4L60, T56, T56
Re: idleing at 2,500 rpm
What part is the IAC? I dont know which part it is. whats it stand for again? i cant remember, intake air something,
thanks
thanks
Trending Topics
04-20-2007, 06:14 PM
#9
Senior Member
Thread Starter
iTrader: (6)
Join Date: Sep 2001
Location: Richmond Hill, GA
Posts: 633
Likes: 0
Received 5 Likes
on
3 Posts
Car: They all sit.
Engine: LB9,LB9, LS1, LT4, LT4
Transmission: T5, T5, 4L60, T56, T56
Re: idleing at 2,500 rpm
ive got the book. just like to get my info from others insted.
all my hoses are fine by the way. no leaks there
all my hoses are fine by the way. no leaks there
04-23-2007, 10:17 AM
#10
Senior Member
Join Date: Dec 2003
Location: Minneapolis, MN
Posts: 690
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1989 Camaro RS
Engine: ZZ4 350
Transmission: T-5
Axle/Gears: BW 9-bolt w/3.73
Re: idleing at 2,500 rpm
This may sound like a weird question but does it sound like it's idling at 2500 rpm? Is it possible your tach has gone screwy? When I fried my tach I had an indicated 2400 rpm at a 750 rpm idle. If you pulled you gauge cluster out at any time without unhooking your battery you may have damaged it.
04-23-2007, 12:10 PM
#12
TGO Supporter
iTrader: (12)
Join Date: Jun 2002
Location: AR
Posts: 6,819
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Re: idleing at 2,500 rpm
I was working down by my peddles, and bent the metal sheild around the throttle peddle. It caused my car to idle at 3000+
04-23-2007, 09:56 PM
#16
Junior Member
Join Date: Feb 2006
Location: ft lewis wa
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Re: idleing at 2,500 rpm
when my cooling fan switch went out and did not let the engine get above 140 degrees my car would not drop below 2500rpm hope this info helps. what i was told the computer kept trying to warm the car up but couldnt.thats my
04-23-2007, 10:10 PM
#17
Senior Member
Thread Starter
iTrader: (6)
Join Date: Sep 2001
Location: Richmond Hill, GA
Posts: 633
Likes: 0
Received 5 Likes
on
3 Posts
Car: They all sit.
Engine: LB9,LB9, LS1, LT4, LT4
Transmission: T5, T5, 4L60, T56, T56
Re: idleing at 2,500 rpm
i believe my cooling fan had been wired to stay on, or else the previous owner had trouble with it, but it had been rewired somehow. might be something to look into, thanks.
Thread
Thread Starter
Forum
Replies
Last Post
