over sensitive gas pedal
Thread Starter
Intermediate
Joined: Nov 2006
Posts: 30
Likes: 0
From: Ham Lake MN
over sensitive gas pedal
Hi guys! I have had this problem since I got this car last fall. It seems that the gas pedal is over sensitive, it is hard to start out without over reving or killing it. When it's cold it hunts and that makes it worse. There are no vacuum leaks or intake air system leaks. I have a MAF translator and any setting change makes it hunt more.
I took it to a local speed shop and they replaced the plugs and wires, $600.00 later it still does the same thing. Could it be related to the TPS or maybe the gas pedal assy? Thanks for your help!!
I took it to a local speed shop and they replaced the plugs and wires, $600.00 later it still does the same thing. Could it be related to the TPS or maybe the gas pedal assy? Thanks for your help!!
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
Before you start "ditching" anything, perform the check in the service manual for the throttle position sensor. Also, if you took it to the local speed shop to fix this problem, and it still does the same thing, they need to fix the problem, and reinsburse you for changing the parts you didn't need. At the very least, you pay for the parts, they eat the labor. It's they're problem, not yours.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
if you remove the air bridge; you can then look directly in to the throttly body. Have someone else sit in the drivers seat - key in "on" but the engine not running - and watch the action of the butterfly plate.
here is a video I took of it in action; with steady (but slow) movement of the gas pedal from idle to WOT, and back:
http://ctechradio.com/temp/throttleplate.mpg
In order to get the camera angle proper, I used a m1rror. So the view is in to a mirror...
.
here is a video I took of it in action; with steady (but slow) movement of the gas pedal from idle to WOT, and back:
http://ctechradio.com/temp/throttleplate.mpg
In order to get the camera angle proper, I used a m1rror. So the view is in to a mirror...
.
Last edited by Mike Mercury; May 1, 2007 at 05:07 PM.
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Thread Starter
Intermediate
Joined: Nov 2006
Posts: 30
Likes: 0
From: Ham Lake MN
They said they did some diognostics too, but did not find anything. I installed the MAF translator afterwards and it made no diff. untill I changed the base settings. so I took it out. Still runs the same. Is there any tension changes you can make to the gas pedal? It seems very lite.
Drifting
Joined: May 2003
Posts: 1,715
Likes: 1
From: cAshburn VA
IAT maybe causing the rpm hunt? I am assuming that they checked that somewhere with the leftovers of 600 after plugs and wires.
Borrow a buddies tb w/elec and swap over and see if that takes care of it, could be the tps.
If you are anywhere close to me, let me know, we'll put EFI live on her and check it out.
Borrow a buddies tb w/elec and swap over and see if that takes care of it, could be the tps.
If you are anywhere close to me, let me know, we'll put EFI live on her and check it out.
Racer
Joined: Sep 2006
Posts: 389
Likes: 1
From: Roswell GA
Have you tried the idle relearn procedure? It is a five minute procedure and is simple. Just do a search on the forum for the directions. For a 6 speed you are suppose to turn the car on and let idle in neutral with the air off for about 5 minutes and then turn the car off. Wait 30 seconds and then recrank the car. Viola you are done. I think the directions for an automatic is slightly different.
Thread Starter
Intermediate
Joined: Nov 2006
Posts: 30
Likes: 0
From: Ham Lake MN
Update: I tried the idle re-learn and looked at the throttle plate for smooth movement, no problem there. I removed the MAF translator and no help. It hunts when it's cold right after I let off the gas pedal and does the same after its warm when I let off the gas. It does it for about 3 or 4 times and then smooths out. grrrr!!! other than this it runs perfectly. I may have to take it back to Doug Rippie. 
Former Vendor
Joined: Feb 2004
Posts: 9,615
Likes: 13
From: Burlington NC
Please get that car out to us now!!! I don't remember the car right of hand. But I know someone else has been playing around. We don't use any MAS gimmicks or anything crazy like that. We have sold a lot of head and cam packages mailorder so it maybe one of those cars. Did you change the wheels??? Please give me a call and we will be more then happy to take a look at it.
Randy
763-477-9272
Randy
763-477-9272
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
It hunts when it's cold right after I let off the gas pedal and does the same after its warm when I let off the gas.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Just as an extra thought, check out the PCV valve and especially the pcv hose to manifold. They are prone to developing a hole on the bottom of them where you can't see.
