weird idle. IAC? TPS?
Thread Starter
Launching!
Joined: Nov 2005
Posts: 214
Likes: 0
From: birmngham, al
weird idle. IAC? TPS? not sure whats going on, but here it is. Sometimes, not all the time, but sometimes my car wants to idle up whenever i push in the clutch. Come to a stop and it idles normal. Other times it runs fine. Puch in the clutch and the RPM's drop down to the normal idle RPM. I have checked all vacuum lines and cleaned everything i can think of. Any ideas?
Thread Starter
Launching!
Joined: Nov 2005
Posts: 214
Likes: 0
From: birmngham, al
the last time it did this it was from a vacuum leak. I havent had a chance to check my IAC count yet. I know i have a code for the rear O2's since i dont have cats, but thats the only mod, and its been like that for i while now with no problem
Thread Starter
Launching!
Joined: Nov 2005
Posts: 214
Likes: 0
From: birmngham, al
usually up to around 2K until you come to a complete stop. The last time it did it, it was a vacuum leak. Put a new hose on a it was fine. But the difference now is that it doesnt do it all the time. Like yesterday when i left my house it was doing it, but about 5 miles down the road i pushed in the clutch and it stop revving, BUT, a few more miles later i pushed in the clutch and i started revving again, and i had never cut the car off. I took WD40 and hoses down the vacuum lines up front
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My car does the same thing depending on MPH when I shove the clutch petal down. If I'm above 10 or 12 MPH it idles up but much less and it drops down. I'm just head/cam and stock cube with T-56. So it sounds normal to me.
Thread Starter
Launching!
Joined: Nov 2005
Posts: 214
Likes: 0
From: birmngham, al
ok, tried a new o ring. didnt fix anything. At idle, just like when driving, sometimes you can touch the trottle and it will run up to 1500 and idle there before dropping back down
strange.
i think a vacuum leak would make the car pull in gear and race at idle.
do you have EFILive/HPtuners?
TECH Resident
Joined: Aug 2003
Posts: 970
Likes: 4
From: England UK
Glad you found what type of fault it was, do you know where the vacuum leak is yet?
Mine leaked in the rubber pipe the plugs into the side of the intake at the front which comes off of the rocker covers.
Mine leaked in the rubber pipe the plugs into the side of the intake at the front which comes off of the rocker covers.
I am having that problem as well, but with an auto, Its kinda like the Cruise Control is on. lol.
It usually does it after I am cruising at a decent speed, and let of the throttle, it likes to hang around 14-1500 rpms.
It usually does it after I am cruising at a decent speed, and let of the throttle, it likes to hang around 14-1500 rpms.
On The Tree
Joined: Jan 2007
Posts: 177
Likes: 0
From: Portsmouth, VA
I have the same issue, but it was self caused, i pulled my tps off and it fell apart, so i put it back together and now a couple of times a day it will stick at 15% throttle on the scanner making my idle high. I need to just buy a new tps.
