High idle
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
I lied. My high idle prob is still there.
I replaced the PCV, TPS, IAC and checked for vaccume leaks and found nothing. Driving down the road if you push in the clutch the RPMs will drop to,2k and stay there with my foot off the gas. Will stay there for at least 30 sec.
Any more ideas
I replaced the PCV, TPS, IAC and checked for vaccume leaks and found nothing. Driving down the road if you push in the clutch the RPMs will drop to,2k and stay there with my foot off the gas. Will stay there for at least 30 sec.Any more ideas
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
How do you clean the MAF?
Here is pics of what i pulled from the passenger valve cover(on the left) and what i put in its place(on the right). No difference in how it runs at all.
Here is pics of what i pulled from the passenger valve cover(on the left) and what i put in its place(on the right). No difference in how it runs at all.
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
you can clean the MAF with electronics cleaner (can get at radio shack) or maf cleaner from any autoparts store.
those pics look like a breather valve.
the only other thing that i could suggest that could effect idle would be the IAT sensor in the intake
but having said that after replacing all those other parts did you reset the ecu?
those pics look like a breather valve.
the only other thing that i could suggest that could effect idle would be the IAT sensor in the intake
but having said that after replacing all those other parts did you reset the ecu?
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
WELL i cleaned the MAFw carb cleaner. The test drive seemed to act like it hepled. Woulnt really know till i take my 100 mile ride to work in the am.
And yes. i disconneced the battery for 10 min
And yes. i disconneced the battery for 10 min
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
if you can, do a couple of wide open throttle spurts and then lift and engine brake off an exit all the way down to idle.
hope it works for you...
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Nope. Didn't fix $#!+. But it is a lil pepier now. But still has idle of about 2k when crusing down the highway. This truck is pissing me off. I am almost tempeted to take it to a dealer
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
please help me out here you did replace the PCV valve underneath the intake manifold right? the part you showed in the pic was not it....
Cargo Master
Joined: May 2001
Posts: 3,208
Likes: 13
Folks there is only 3 ways to get a high idle condition.
1. Throttle is not closing all the way.
2. Iac is not functioning properly Ie: stuck open
3. Massive vacuum leak
1. Throttle is not closing all the way.
2. Iac is not functioning properly Ie: stuck open
3. Massive vacuum leak
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Do you have a pic of what it looks like?
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
sorry looking again that pic you showed did look like the pcv. did
you check the vac line attached to it? mine was leaking and caused
high idle. again my bad the 2.3 engine's pcv is located under the manifold
..forgot yours is the 4.0...
you check the vac line attached to it? mine was leaking and caused
high idle. again my bad the 2.3 engine's pcv is located under the manifold
..forgot yours is the 4.0...
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
2.I am thinking that is the problem but there is so many things that control it.
3. I cant find any vacuum leak w carb cleaner so i think i ruled that out
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