Lurching when cold

[flyguy]

Every day I start my day driving, my Explorer seems to "lurch" as im first driving out. I would say it would be like im pressing the gas realy hard and letting go a few times in a row (like Im learning to drive a stick or something) It jerks everybody in the car around and because I lurch forward, Im afraid I might hit something. Any idea whats causing this? It seems to only be when I first start the car after its sit for awhile.

 

[Jmoney715]

maybe this http://www.explorerforum.com/forums/showthread.php?t=174180 could relate to your problem?

 

[flyguy]

I dont think so... Im not sure, but I think mine occurs usually only once, and it seems like its in first gear only.... Ill see if I can pay more attention when it happens, but it could be on the shift to 2nd. You know what it feels like? A rev limiter going off under acceleration.... but im hardly moving.

 

[2006_MM_FYRE41]

I experience that same lurch on my 2006 Mountaineer, V-8 AWD when it is cold. I think it may haves to do with the shifting problems in the 6 speed tranny's

 

[flyguy]

The linked thread abouve just mentioned the problems on 06 models and 07 sport tracs... perhaps it extends further? I guess I can take it in, but I hope they dont give me crap about my KKM installed.

 

[shaker1]

I would put the stock intake back on and reset the computer. See if it clears up. Possibly the MAF is getting bad readings and the engine is having trouble maintaining A/F.

Either way the dealer is likely to blame the KKM and not take the problem seriously.

Have you tried scanning for codes?

 

[flyguy]

Well I know its not actually the KKM... at least im pretty sure. It has been doing this sence before the KKM was installed. I just thought my foot was a little twitchy at first. Man I dont wanna put that air box back on. lol

 

[paulyjsob]

Mine does the same thing every once in a while. Did you get this fixed?
Thanks!

 

[Joe Dirt]

Well I know its not actually the KKM... at least im pretty sure. It has been doing this sence before the KKM was installed. I just thought my foot was a little twitchy at first. Man I dont wanna put that air box back on. lol

Even if it was doing it before the KKM was installed and you're 110% positive it isn't the intake, still put the stocker back on, because as soon as some dealers see an aftermarket part, they'll close the hood and say that they can't figure it out, because it's been modified with non-Ford parts and systems. Sucks, but that's how a lot of dealers are- or they'll charge you $$$ to fix it just because.

 

[Joe Dirt]

Well I know its not actually the KKM... at least im pretty sure. It has been doing this sence before the KKM was installed. I just thought my foot was a little twitchy at first. Man I dont wanna put that air box back on. lol

Even if it was doing it before the KKM was installed and you're 110% positive it isn't the intake, still put the stocker back on, because as soon as some dealers see an aftermarket part installed they'll close the hood and say that they can't figure it out, because it's been modified with non-Ford parts and systems. Sucks, but that's how a lot of dealers are- or they'll charge you $$$ to fix it just because.

 

[swetrid]

Ford has a tsb for reprogram pcm for these concerns.
Printable View (48 KB)
TSB
07-10-12 VARIOUS DRIVEABILITY AND A/C PERFORMANCE QUALITY SYMPTOMS - 4.6L 3V 6R60 EQUIPPED VEHICLES ONLY

Publication Date: May 14, 2007

FORD: 2006-2007 Explorer
2007 Explorer Sport Trac
MERCURY: 2006-2007 Mountaineer


This article supersedes TSB 06-23-11 and 07-2-8 to update the Service Procedure.

ISSUE:
Some 2006-2007 Explorer/Mountaineer and 2007 Explorer Sport Trac vehicles equipped with the 4.6L engine and 6R60 transmission may exhibit various driveability and A/C performance quality symptoms.

ACTION:
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

Apply reprogram to 2006-2007 Explorer/Mountaineer and 2007 Explorer Sport Trac vehicles that may exhibit the following symptoms:

SYMPTOMS

Cold hesitation/surge
Long crank
Engine fan noise on cold start and A/C operation
High idle during warm up (cold engine)
Inaccurate Message Center average fuel economy estimation
Overheat indication at idle in gear in high ambient temperatures
A/C shutoff at idle in gear in high ambient temperatures
Lower than desired RPM during long deceleration
Install IDS or equivalent and ID the vehicle.
Update the PCM and TCM calibration using IDS release 48.13 and higher or 49.2 and higher. This new calibration is not included in the VCM 2007.5 DVD. Calibration files may also be obtained at www.motorcraft.com. Since the TCM cannot be reprogrammed alone, reprogram the PCM/TCM together to ensure that both engine and transmission calibrations are updated to the latest level simultaneously.

WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATION DESCRIPTION TIME
071012A 2006-2007 Explorer/Mountaineer, And 2007 Explorer Sport Trac 4.6L Engine, 6R60 Transmission: Reprogram PCM And TCM (Do Not Use With 12650D) 0.6 Hr.

DEALER CODING
BASIC PART NO. CONDITION CODE
recal 04

--------------------------------------------------------------------------------

NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.

Copyright © 2007 Ford Motor Company

 

[boylanp]

Not sure if this thread is dead or not but I'll post anyway. I owned a Mustang GT 4.6L 2 valve engine 5-speed for several years and it would do the same thing when cold. I now own an '07 Explorer with a 4.6L 3 valve automatic and it does the same thing when cold.
When the problem first happened on the Mustang my Dad's neighbor mentioned that his buddy owned a cobra with the 4.6L 4 valve, and it did the same thing.
I've owned 3 vehicles with the 4.6L and none have ever burned oil or seized up. My advice is to stay light on the gas until it warms up.

 

[feetwet]

Is there any quick way to tell if my Ex has had this TSB applied already? vs an older version? (I have a contact at the dealer I can email)

Is this the same as the "hard shifting" TSB?

Ford has a tsb for reprogram pcm for these concerns.
Printable View (48 KB)
TSB
07-10-12 VARIOUS DRIVEABILITY AND A/C PERFORMANCE QUALITY SYMPTOMS - 4.6L 3V 6R60 EQUIPPED VEHICLES ONLY

Publication Date: May 14, 2007

FORD: 2006-2007 Explorer
2007 Explorer Sport Trac
MERCURY: 2006-2007 Mountaineer