Please Help!! High idle and I tried everything
07-13-2007, 07:50 PM
#1
Please Help!! High idle and I tried everything Car wants to idle at 2500rpm any time there is forward momentum.
After making a "complete" stop, at a light for example, it will wind down a little.
While moving, any time I hit the clutch in, it jumps to 2500+. In OR out of gear, it wants to hang at that rpm if I am in motion. Even a high gear will pull its way thru the rpm's and the car gets up to speed quickly. It absolutely wants to climb the revs, making me hit the brake sometimes to slow her down or I have to ride the clutch a little to keep her calm. I have to grab grears fast, because between them the revs jump quick when the clutch is in.
I have changed the O2's, just changed the IAC, found no visable vac leaks, put a spring on the TB to see if pulling it closed tighter would help, all it did was make the gas harder to push, but it still wants to go!
I am out of ideas.
Anyone?
After making a "complete" stop, at a light for example, it will wind down a little.
While moving, any time I hit the clutch in, it jumps to 2500+. In OR out of gear, it wants to hang at that rpm if I am in motion. Even a high gear will pull its way thru the rpm's and the car gets up to speed quickly. It absolutely wants to climb the revs, making me hit the brake sometimes to slow her down or I have to ride the clutch a little to keep her calm. I have to grab grears fast, because between them the revs jump quick when the clutch is in.
I have changed the O2's, just changed the IAC, found no visable vac leaks, put a spring on the TB to see if pulling it closed tighter would help, all it did was make the gas harder to push, but it still wants to go!
I am out of ideas.
Anyone?
07-15-2007, 09:09 AM
#5
I had a tune.
This happened out no where.
It happened after I put in my NOS gauge. But doing that didnt mes with anything that would do this? right?
I think the old IAC was dead. The new one works since I have pulled it out a few times and its moved positions.
Could it possibly be the mass air flow sensor?
That is still a stock unit w/100k on it.
thanx guys!!! Im pulling my hair out, everyone wants to race or roll up thier windows
This happened out no where.
It happened after I put in my NOS gauge. But doing that didnt mes with anything that would do this? right?
I think the old IAC was dead. The new one works since I have pulled it out a few times and its moved positions.
Could it possibly be the mass air flow sensor?
That is still a stock unit w/100k on it.
thanx guys!!! Im pulling my hair out, everyone wants to race or roll up thier windows
07-15-2007, 10:38 AM
#6
I can't think of a reason why it would happen out of no where. Unless you had your battery unhooked for the install and the idle trims reset, but I'm pretty sure idle trims don't reset like that.
Can you adjust your throttlebody set screw? If so, adjust it all the way down (closed). It's possible that the screw is holding your tb open and kicking it out of "idle mode".
Try this for fun, when its doing its high idle thing, park it and let it idle for five minutes straight. This will let the long term idle trims learn completely. Then drive again and see if it does it. If it does you know your idle trims are too far out of limits for the pcm to store them. You'll probably need your idle air tables adjusted. I'm pretty sure it's not the maf but it could be the tps maybe.
Can you adjust your throttlebody set screw? If so, adjust it all the way down (closed). It's possible that the screw is holding your tb open and kicking it out of "idle mode".
Try this for fun, when its doing its high idle thing, park it and let it idle for five minutes straight. This will let the long term idle trims learn completely. Then drive again and see if it does it. If it does you know your idle trims are too far out of limits for the pcm to store them. You'll probably need your idle air tables adjusted. I'm pretty sure it's not the maf but it could be the tps maybe.
07-15-2007, 09:53 PM
#7
Originally Posted by P Mack
I can't think of a reason why it would happen out of no where. Unless you had your battery unhooked for the install and the idle trims reset, but I'm pretty sure idle trims don't reset like that.
Can you adjust your throttlebody set screw? If so, adjust it all the way down (closed). It's possible that the screw is holding your tb open and kicking it out of "idle mode".
Try this for fun, when its doing its high idle thing, park it and let it idle for five minutes straight. This will let the long term idle trims learn completely. Then drive again and see if it does it. If it does you know your idle trims are too far out of limits for the pcm to store them. You'll probably need your idle air tables adjusted. I'm pretty sure it's not the maf but it could be the tps maybe.
Can you adjust your throttlebody set screw? If so, adjust it all the way down (closed). It's possible that the screw is holding your tb open and kicking it out of "idle mode".
Try this for fun, when its doing its high idle thing, park it and let it idle for five minutes straight. This will let the long term idle trims learn completely. Then drive again and see if it does it. If it does you know your idle trims are too far out of limits for the pcm to store them. You'll probably need your idle air tables adjusted. I'm pretty sure it's not the maf but it could be the tps maybe.
I did have the battery un-hooked when i installed my sub.
I will try your idea.
Im open for anything!!
I am pulling my hair out.
When I am sitting it, does hiccup every 30 seconds.
Maybe you are on to something.
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07-16-2007, 06:56 PM
#11
Originally Posted by 99NMB
do you have a big vacuum line off. like the one for the pvc system
Would that surface when I sprayed the hell out of it with TB cleaner?
Can anyone give me details on a few lines that are considered vac lines?
I may not know all of the potential vac lines and may miss them.
What is a surefire way to know a vac line from anything else?
07-16-2007, 07:14 PM
#12
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Originally Posted by hugger1975
Im not sure what the PVC is.
Would that surface when I sprayed the hell out of it with TB cleaner?
Can anyone give me details on a few lines that are considered vac lines?
I may not know all of the potential vac lines and may miss them.
What is a surefire way to know a vac line from anything else?
Would that surface when I sprayed the hell out of it with TB cleaner?
Can anyone give me details on a few lines that are considered vac lines?
I may not know all of the potential vac lines and may miss them.
What is a surefire way to know a vac line from anything else?
It's on the manifold directly behind your throttle body on the passenger side. Should be a 1/4" hose or close to it.
if you pull it off and start your car, it will idle very fast(2k) and you'll here a gigantic sucking sound.
the next huge vacuum line goes to your brake booster. It's on the passenger side of your brake master cylinder. It's another 1/4 hose and should be connected with 1 clamp.
next vac line comes off of the back of the manifold and controls your A/C selector. Your vents would malfunction if this was the case.
i think those are the main ones...just check around your manifold.
07-17-2007, 11:25 AM
#13
Originally Posted by Ceissus
It's PCV valve.
It's on the manifold directly behind your throttle body on the passenger side. Should be a 1/4" hose or close to it.
if you pull it off and start your car, it will idle very fast(2k) and you'll here a gigantic sucking sound.
the next huge vacuum line goes to your brake booster. It's on the passenger side of your brake master cylinder. It's another 1/4 hose and should be connected with 1 clamp.
next vac line comes off of the back of the manifold and controls your A/C selector. Your vents would malfunction if this was the case.
i think those are the main ones...just check around your manifold.
It's on the manifold directly behind your throttle body on the passenger side. Should be a 1/4" hose or close to it.
if you pull it off and start your car, it will idle very fast(2k) and you'll here a gigantic sucking sound.
the next huge vacuum line goes to your brake booster. It's on the passenger side of your brake master cylinder. It's another 1/4 hose and should be connected with 1 clamp.
next vac line comes off of the back of the manifold and controls your A/C selector. Your vents would malfunction if this was the case.
i think those are the main ones...just check around your manifold.
your the man!!!
Im such a rookie.
I can install bolt on's, stereo's and electronics but I cant find a hose!!
I will go at it today.
Thanx guys.
07-17-2007, 11:26 AM
#14
Originally Posted by Ceissus
It's PCV valve.
It's on the manifold directly behind your throttle body on the passenger side. Should be a 1/4" hose or close to it.
if you pull it off and start your car, it will idle very fast(2k) and you'll here a gigantic sucking sound.
the next huge vacuum line goes to your brake booster. It's on the passenger side of your brake master cylinder. It's another 1/4 hose and should be connected with 1 clamp.
next vac line comes off of the back of the manifold and controls your A/C selector. Your vents would malfunction if this was the case.
i think those are the main ones...just check around your manifold.
It's on the manifold directly behind your throttle body on the passenger side. Should be a 1/4" hose or close to it.
if you pull it off and start your car, it will idle very fast(2k) and you'll here a gigantic sucking sound.
the next huge vacuum line goes to your brake booster. It's on the passenger side of your brake master cylinder. It's another 1/4 hose and should be connected with 1 clamp.
next vac line comes off of the back of the manifold and controls your A/C selector. Your vents would malfunction if this was the case.
i think those are the main ones...just check around your manifold.
and hmmmmmmmmmmmm
my air cond stopped working very recently
07-17-2007, 01:48 PM
#17
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Originally Posted by P Mack
It doesn't control the air conditioning compressor, it changes the airflow path from defrost, dash vents, feet vents, etc.
07-17-2007, 02:41 PM
#18
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This very situation happened to a friend when one of his TSP cylinder heads broke at a rocker arm support. No noise, just high rpm's. If all other efforts fail pull your valve covers and inspect.
