Throttle lag? Gone!
12/24/07, 09:50 AM
#41
Legacy TMS Member
A tune will not solve the dead-play issue because that is mechanical. The only thing a tune will solve is the throttle hang.
My 07 GT does not have throttle lag, but it does have some throttle hang and about 1/8" of throttle dead-play.
Throttle lag is when you GO WFOT and it takes 0.5 seconds before it realizes you wanted to go WOT. The Pontiac G6 suffers from this and it sucks big time.
My 07 GT does not have throttle lag, but it does have some throttle hang and about 1/8" of throttle dead-play.
Throttle lag is when you GO WFOT and it takes 0.5 seconds before it realizes you wanted to go WOT. The Pontiac G6 suffers from this and it sucks big time.
12/25/07, 12:58 PM
#42
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A tune sould be able to fix hang or lag, since they're both computer issues. The dead spot off idle in the throttle mechanism (if you have it) can be fixed a couple different ways - http://www.mustangforums.com/m_37925...23/key_/tm.htm.
12/25/07, 01:13 PM
#43
Legacy TMS Member
I do not detect any lag in my 07 GT. Are there any S197s with throttle lag? I do experience throttle hang and the dead-play in the throttle.
12/25/07, 01:36 PM
#44
Team Mustang Source
I didn't think I had any throttle lag before I got a tune. After I got the tune, I realized how much lag there was in stock form. Engine response is instant now. I knew I had throttle hang, and it is also gone with the tune.
12/28/07, 07:30 AM
#45
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Get a tune.
1/3/08, 10:20 AM
#46
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Interesting.
Last week, I brought my '06 manual GT in for service for two throttle-related issues:
In idle, car would rev on its own, sometimes spiking at 1500-2000 RPM, and dipping to 500 RPM and below, almost to the point of stalling.
After about a week of this, the car began stalling in idle when the RPM would dip below 500, and would almost always stall in reverse.
It was found that the connection between CAI and TB was loose, so it was tightened.
When I picked up my car, it seemed that both of these issues had been fixed.
However, on my drive home, I noticed the RPM began bouncing erratically again.
It wasn't as severe as before, but it was still apparent.
So, I brought the car back in yesterday, and asked them to check the TB and clean if necessary.
They found a decent amount of carbon buildup in the TB and cleaned it.
Picked up the car last night, and when I started up the car, the throttle soared open to about 2000 RPM, and stayed there a bit before VERY SLOWLY creeping down to about 1000.
As I drove the car away, I noticed a brand new issue: this same throttle hang you guys are talking about in this thread.
While coming to a stop, taking my foot off the accelerator and taking the car out of gear leaves the throttle open for a good couple of seconds before very slowly returning to about 700-1000 RPM idle.
Now, it sounds like a lot of you have been experiencing this for some time, but this is the first time I've ever experienced any degree of throttle hang.
I've had a K&N CAI with no tune installed for over a year, and for several months, I've noticed a pretty significant decrease in performance—most notably, slow starts, jerky shifting, and throttle hang—but it could never be determined what was causing the decreased performance.
Bringing the car back to the dealer had always resulted in the standard-issue "that's normal driveability for a Mustang" song and dance.
Anyway, is it possible that the recent adjustment of the CAI-to-TB connection + the cleaning of the TB + no tune with my CAI has now somehow brought this throttle hang issue to the forefront?
Is it possible that a custom tune will alleviate this throttle hang, which a lot of you are saying is 'normal,' albeit annoying?
Or does this sound like a problem with the MAF sensor?
Last week, I brought my '06 manual GT in for service for two throttle-related issues:
In idle, car would rev on its own, sometimes spiking at 1500-2000 RPM, and dipping to 500 RPM and below, almost to the point of stalling.
After about a week of this, the car began stalling in idle when the RPM would dip below 500, and would almost always stall in reverse.
It was found that the connection between CAI and TB was loose, so it was tightened.
When I picked up my car, it seemed that both of these issues had been fixed.
However, on my drive home, I noticed the RPM began bouncing erratically again.
It wasn't as severe as before, but it was still apparent.
So, I brought the car back in yesterday, and asked them to check the TB and clean if necessary.
They found a decent amount of carbon buildup in the TB and cleaned it.
Picked up the car last night, and when I started up the car, the throttle soared open to about 2000 RPM, and stayed there a bit before VERY SLOWLY creeping down to about 1000.
As I drove the car away, I noticed a brand new issue: this same throttle hang you guys are talking about in this thread.
While coming to a stop, taking my foot off the accelerator and taking the car out of gear leaves the throttle open for a good couple of seconds before very slowly returning to about 700-1000 RPM idle.
Now, it sounds like a lot of you have been experiencing this for some time, but this is the first time I've ever experienced any degree of throttle hang.
I've had a K&N CAI with no tune installed for over a year, and for several months, I've noticed a pretty significant decrease in performance—most notably, slow starts, jerky shifting, and throttle hang—but it could never be determined what was causing the decreased performance.
Bringing the car back to the dealer had always resulted in the standard-issue "that's normal driveability for a Mustang" song and dance.
Anyway, is it possible that the recent adjustment of the CAI-to-TB connection + the cleaning of the TB + no tune with my CAI has now somehow brought this throttle hang issue to the forefront?
Is it possible that a custom tune will alleviate this throttle hang, which a lot of you are saying is 'normal,' albeit annoying?
Or does this sound like a problem with the MAF sensor?
1/3/08, 02:16 PM
#47
Legacy TMS Member
Have you tried cleaning your MAF sensor? K&N filters rely on an oil to provide its mediocre filtering capability. This oil often seeps out and flows onto the hot MAF sensor sampling wires, causing severe driveability issues.
It's also possible your TB/motor is shot which I think isn't too uncommon with 05-06 Mustangs.
It's also possible your TB/motor is shot which I think isn't too uncommon with 05-06 Mustangs.
1/3/08, 03:29 PM
#49
Team Mustang Source
Now that the TB is clean, keep driving it for a few days and see if it gets better. The car might take a few days to re-learn it's idle trims and such with the newly cleaned TB. If you are impatient, you can try and disconnect the negative battery cable for about 20 minutes to reset the KAM (keep alive memory).
1/4/08, 07:03 AM
#51
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Now that the TB is clean, keep driving it for a few days and see if it gets better. The car might take a few days to re-learn it's idle trims and such with the newly cleaned TB. If you are impatient, you can try and disconnect the negative battery cable for about 20 minutes to reset the KAM (keep alive memory).
Yesterday, I noticed it not hanging nearly as much as it has been.
I asked him to check the MAF sensor and clean if necessary, and he later told me that he didn't see any problems with it.
So I dunno.
I assume he disconnected it and looked to see if it was dirty.
Perhaps this is something I should do myself.
What should I be looking for?
1/4/08, 08:45 AM
#52
Legacy TMS Member
If it is getting better and you're not experiencing any problems, leave it be.
Otherwise, I generally clean my MAF by disconnecting the MAF sensor harness and spraying electric contact cleaner on the sampling wires. I would let it completely dry out before re-attaching the harness. This would ensure the sampling wire is clean as can be.
Otherwise, I generally clean my MAF by disconnecting the MAF sensor harness and spraying electric contact cleaner on the sampling wires. I would let it completely dry out before re-attaching the harness. This would ensure the sampling wire is clean as can be.
1/4/08, 03:59 PM
#53
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In idle, car would rev on its own, sometimes spiking at 1500-2000 RPM, and dipping to 500 RPM and below, almost to the point of stalling.
After about a week of this, the car began stalling in idle when the RPM would dip below 500, and would almost always stall in reverse.
After about a week of this, the car began stalling in idle when the RPM would dip below 500, and would almost always stall in reverse.
1/6/08, 12:24 AM
#56
Team Mustang Source
I don't know about a simple green wipe. What I did was simply remove the air intake tube, then remove the TB. It is pretty simple and you should be able to figure it out fairly easily. Once you have the TB off, just clean up any black junk you find in the butterflies, moving them open to get to all of it.
I just used a dry cotton shop towel to wipe it off, it came off fairly easily with a little pressure and wiping. I didn't need to use any solvents or any cleaning agents.
I just used a dry cotton shop towel to wipe it off, it came off fairly easily with a little pressure and wiping. I didn't need to use any solvents or any cleaning agents.
1/7/08, 09:20 AM
#57
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1/7/08, 10:12 AM
#58
Team Mustang Source
So did mine, everything was peachy until I put the intake on. You will not notice any dirtiness unless you open up the butterflies. All the crud is on the rear of the butterflies.
1/7/08, 10:35 AM
#59
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