Jumpiness when starting out on a cold engine? - 2003-04 Mach 1 Registry Owners Club

screamin'04 · 05-18-2004, 09:21 PM

Anyone notice that when you have to jump into a cold engine and drive off without it warming up, that you get a REALLY jerky start for about 30-45 seconds of driving.

I hate to not let it warm up, but I run late quite a bit for work in the morning. I am a night person, not a morning person !?!?!

Thx for the feedback in advance.

Sapperstang · 05-19-2004, 10:44 AM

Ok I am not alone. Mine does that same thing. You can feel it slightly "bucking" and jerking until it warms up. Funny thing is, my 03 GT did the same thing. I thought it might of had to do with this timing adjuster. I am not going to sit with the car running until it warms up because I shouldnt have to do that. I plan on taking mine in to have them look at the squeeky suspension I have. While im at it they can look at this problem too.

San Pedro Mach · 05-19-2004, 05:02 PM

I get like a "jerky" motion at the first stop, about a block away from my garage. Almost like I ran over a pothole or something. After that, it's smooth...But this only happens once & a while.

Torched · 05-20-2004, 10:17 PM

Hey Sapperstang, mine does exactly what you described. I thought I was alone in this as well. I guess eventually I will have to have it looked at. Let me know what your dealer says.

FL 03 Mach 1 · 05-21-2004, 09:55 AM

Count me in on this one. I have the same problem.

MachKid03 · 05-21-2004, 08:23 PM

Me too! I've learned to just baby it for the first mile or so, then anything goes!

BADMACH · 05-25-2004, 03:49 AM

my gt did it and now my mach does the same thing. i asked one of my buddies at ford and he said they get those complaints on mustangs daily. he said its just the computer getting used to the air. like the humidity and temperature, that kind of stuff. and when it adjusts the jerking stops. in other words he told me get used to it

timster · 05-27-2004, 01:58 AM

Ask the dealership to fix this issue using TSB for replacment of the MAF Sensor (Mass Air Flow). Just had mine fixed today. No more bucking.... stalling..... herky jerky feeling.

timster · 05-27-2004, 02:02 AM

Quote:

Originally posted by BADMACH
my gt did it and now my mach does the same thing. i asked one of my buddies at ford and he said they get those complaints on mustangs daily. he said its just the computer getting used to the air. like the humidity and temperature, that kind of stuff. and when it adjusts the jerking stops. in other words he told me get used to it

He's talking out of his a$$ and blowing smoke up yours! It's not normal and there is a TSB for it. MAF sensor will fix it as it did mine.

Matt's Mach · 05-27-2004, 03:29 AM

I had my car in today for the same reason, stalling when its cold and rough engine for the first minute engine is running. They said they could not find anything wrong but did send me home with a data recorder hooked up. Wait till it stalls and press the button, will see if it works. good luck everyone.

MachRan · 05-27-2004, 10:38 AM

My car only does it when it has been sitting for a few days.

Sapperstang · 05-28-2004, 08:37 AM

My 03 GT did it. I kinda got used to it but it makes me mad on the mach. Anyone have the Tsb for the MAF?

myrez99 · 05-28-2004, 12:21 PM

If the Mach doesn't want to turnover when you turn the key for a second or two, then this is for you...... I have the horrible and extremely jerky starts. Feels like your going through the windshield, right. Towne Ford in NY is replacing my fuel pump because they say it is leaking off pressure overnight. They noticed the hard start and checked the tranny and clutch, because I wanted them too. They said a lot of people would come in and complain about their 4.6s stalling and jerky starts with no idiot lights. Ford knows about the faulty fuel pumps so ask them to look into it....they are replacing mine.

hope this helps.

later

Sapperstang · 05-28-2004, 09:14 PM

Dont have that problem myrez. Mine is very subtle. I notice now that it seems to do it after its warm and while accelerating.

Eric C Doescher · 06-07-2004, 02:55 PM

Yea my 04 does the same thing, by the time i drive a mile or so and hit the first red light it seems to go away. Since iam bringing it to the dealer today i guess i'll try my luck at getting it fixed. I'll print out the tech bulliten before i leave.

Torched · 06-08-2004, 12:53 AM

Let me know how this turns out. Mine is subtle as well, but I still can't imagine that's "Just how it is".

mn04mach · 06-10-2005, 02:48 PM

Mine started today, and is far from subtle.

When I am accelerating (even when fully warmed up), the car will accelerate...hesitate....accelerate...hesitate.... etc....

When sitting at idle, it hunts around somtimes down to 750, sometimes up to 1100. Normally it sits at 900 steady.

I thought I bought a Mustang Mach 1, not a Bucking Bronco.

Mod's are in sig, just replaced the MRT Catted H with a MAC Pro Chamber Catted a few days ago, ran fine for the first 2 days after the change, now today... this crap.

I also have the CREAKS in the front end when turning the wheel to the LEFT ONLY at slow speeds and when stopped. Sounds horrible.

Screaming04 · 06-10-2005, 02:56 PM

Dudes...

Any of you remember carbs? How about a choke? We're spoiled by fuel injection these days, engines do need to come up to operating temp before they run perfectly. You can't expect you car to run perfectly when it's dead cold...try it in a car with a carb sometime...

Mine runs a little jerky for about 30 seconds... not that big a deal. The car our's is modeled after would run like a bag of sh*t for about 10 minutes from a cold start...save the shop visits for real problems.

For the post above search "steering rack" that is a known problem and the steering rack bushings need to be replaced...mine were 10 months ago, and no noise since...

Tungsten · 06-10-2005, 03:22 PM

Mine does this as well. Taking it soon for the windshield "wind noise" TSB and will add this TSB to it also.

05-18-2004, 09:21 PM	#1
screamin'04 Registered User Join Date: Jan 2004 Location: Round Rock, TX Posts: 13	Jumpiness when starting out on a cold engine? Anyone notice that when you have to jump into a cold engine and drive off without it warming up, that you get a REALLY jerky start for about 30-45 seconds of driving. I hate to not let it warm up, but I run late quite a bit for work in the morning. I am a night person, not a morning person !?!?! Thx for the feedback in advance.

05-19-2004, 10:44 AM	#2
Sapperstang Registered User Join Date: Jan 2004 Location: Timbukto, AK Posts: 1,587	Ok I am not alone. Mine does that same thing. You can feel it slightly "bucking" and jerking until it warms up. Funny thing is, my 03 GT did the same thing. I thought it might of had to do with this timing adjuster. I am not going to sit with the car running until it warms up because I shouldnt have to do that. I plan on taking mine in to have them look at the squeeky suspension I have. While im at it they can look at this problem too. __________________ 04 Azure Blue Mach 1 SOLD! IUP Steeda Tri-Ax K&N filter SLP Loudmouth catback

05-21-2004, 09:55 AM	#5
FL 03 Mach 1 New "Old School" Join Date: Sep 2003 Location: Palm Harbor Fl. Posts: 126	Count me in on this one. I have the same problem. __________________ Jon Massaro Tampa Bay SVTOA Activities Director For sale 20K miles 21,500.00 2003 Mach1, Oxford White w/ IUP, Build Date 07-14-03 13.6" in the 1/4 mile DYNO: 295.8 hp / 313.1 tq. http://www.tampabaysvtoa.com/forums/...woldschool.jpg

05-27-2004, 10:38 AM	#11
MachRan Registered? Join Date: Oct 2003 Location: Havre de Grace, MD Posts: 1,071	My car only does it when it has been sitting for a few days. __________________ 87 Turbo T Limited 10k org miles 87 Turbo T light chestnut (sold) 86 SVO 7B (sold) 95 Cobra 347 (SOLD) 03 Azure blue 5 spd (SOLD) 93 Calypso coupe (SOLD) 90 LX Vert (SOLD) 86 GT (SOLD)

05-28-2004, 08:37 AM	#12
Sapperstang Registered User Join Date: Jan 2004 Location: Timbukto, AK Posts: 1,587	My 03 GT did it. I kinda got used to it but it makes me mad on the mach. Anyone have the Tsb for the MAF? __________________ 04 Azure Blue Mach 1 SOLD! IUP Steeda Tri-Ax K&N filter SLP Loudmouth catback

05-19-2004, 05:02 PM	#3
San Pedro Mach Resident Subaruista Join Date: Sep 2003 Location: Port Of L.A. Posts: 5,424	I get like a "jerky" motion at the first stop, about a block away from my garage. Almost like I ran over a pothole or something. After that, it's smooth...But this only happens once & a while.

05-20-2004, 10:17 PM	#4
Torched Beer Hobbyist Join Date: Dec 2002 Location: Blah, Blah Posts: 151	Hey Sapperstang, mine does exactly what you described. I thought I was alone in this as well. I guess eventually I will have to have it looked at. Let me know what your dealer says.

05-21-2004, 08:23 PM	#6
MachKid03 Registered User Join Date: Aug 2003 Location: Madison, WI Posts: 84	Me too! I've learned to just baby it for the first mile or so, then anything goes!

05-25-2004, 03:49 AM	#7
BADMACH Registered User Join Date: Jul 2003 Location: cdear park, tx Posts: 29	my gt did it and now my mach does the same thing. i asked one of my buddies at ford and he said they get those complaints on mustangs daily. he said its just the computer getting used to the air. like the humidity and temperature, that kind of stuff. and when it adjusts the jerking stops. in other words he told me get used to it

05-27-2004, 01:58 AM	#8
timster Registered User Join Date: May 2004 Location: Hastings Nebraska Posts: 9	Ask the dealership to fix this issue using TSB for replacment of the MAF Sensor (Mass Air Flow). Just had mine fixed today. No more bucking.... stalling..... herky jerky feeling.

05-27-2004, 03:29 AM	#10
Matt's Mach Registered User Join Date: Mar 2004 Location: Renton, WA Posts: 18	I had my car in today for the same reason, stalling when its cold and rough engine for the first minute engine is running. They said they could not find anything wrong but did send me home with a data recorder hooked up. Wait till it stalls and press the button, will see if it works. good luck everyone.

05-28-2004, 12:21 PM	#13
myrez99 Limited traction Join Date: Dec 2003 Location: West Seneca, NY Posts: 92	For the dudes with the bad starts If the Mach doesn't want to turnover when you turn the key for a second or two, then this is for you...... I have the horrible and extremely jerky starts. Feels like your going through the windshield, right. Towne Ford in NY is replacing my fuel pump because they say it is leaking off pressure overnight. They noticed the hard start and checked the tranny and clutch, because I wanted them too. They said a lot of people would come in and complain about their 4.6s stalling and jerky starts with no idiot lights. Ford knows about the faulty fuel pumps so ask them to look into it....they are replacing mine. hope this helps. later __________________ 2003 Mustang Mach 1 Zinc Yellow/ IUP Bdate: 7/16/03 1 of 869 Mods Eibach Sportlines w/ Tokico Illuminas-valved for the drop Maximum Motorsports 4 bolt C/C plates Diablo Predator Future Mods Billet internals Induction Concepts TT setup Built T-56 4.10 gears Many more...... :!!: My 2003 Oxford White Mustang GT will be remembered always My ride

05-28-2004, 09:14 PM	#14
Sapperstang Registered User Join Date: Jan 2004 Location: Timbukto, AK Posts: 1,587	Dont have that problem myrez. Mine is very subtle. I notice now that it seems to do it after its warm and while accelerating. __________________ 04 Azure Blue Mach 1 SOLD! IUP Steeda Tri-Ax K&N filter SLP Loudmouth catback

06-07-2004, 02:55 PM	#15
Eric C Doescher Registered User Join Date: Dec 2003 Location: New Orleans, LA Posts: 30	Yea my 04 does the same thing, by the time i drive a mile or so and hit the first red light it seems to go away. Since iam bringing it to the dealer today i guess i'll try my luck at getting it fixed. I'll print out the tech bulliten before i leave. __________________ Skidmarks6

06-08-2004, 12:53 AM	#16
Torched Beer Hobbyist Join Date: Dec 2002 Location: Blah, Blah Posts: 151	Let me know how this turns out. Mine is subtle as well, but I still can't imagine that's "Just how it is".

06-10-2005, 02:48 PM	#17
mn04mach Registered User Join Date: Apr 2004 Location: Rockford, MN Posts: 123	Re: Jumpiness when starting out on a cold engine? Mine started today, and is far from subtle. When I am accelerating (even when fully warmed up), the car will accelerate...hesitate....accelerate...hesitate.... etc.... When sitting at idle, it hunts around somtimes down to 750, sometimes up to 1100. Normally it sits at 900 steady. I thought I bought a Mustang Mach 1, not a Bucking Bronco. Mod's are in sig, just replaced the MRT Catted H with a MAC Pro Chamber Catted a few days ago, ran fine for the first 2 days after the change, now today... this crap. I also have the CREAKS in the front end when turning the wheel to the LEFT ONLY at slow speeds and when stopped. Sounds horrible. __________________ Black 2004 Mach 1 Steeda - Tri-Ax MRT - Street Smart Cold Air SCT - Chip/Tuned FMS - Aluminum Drive Shaft FMS 4.10s MRT Catted H Pipe (that leaks) - GONE MAC Catted Pro-Chamber MAC Catback

06-10-2005, 02:56 PM	#18
Screaming04 old timer Join Date: Aug 2004 Location: Langley, BC Posts: 1,889	Re: Jumpiness when starting out on a cold engine? Dudes... Any of you remember carbs? How about a choke? We're spoiled by fuel injection these days, engines do need to come up to operating temp before they run perfectly. You can't expect you car to run perfectly when it's dead cold...try it in a car with a carb sometime... Mine runs a little jerky for about 30 seconds... not that big a deal. The car our's is modeled after would run like a bag of sh*t for about 10 minutes from a cold start...save the shop visits for real problems. For the post above search "steering rack" that is a known problem and the steering rack bushings need to be replaced...mine were 10 months ago, and no noise since... __________________ Sold: Screaming Yellow Intercooled 2.1 KB 5speed Mach 1 running a measly 8psi

06-10-2005, 03:22 PM	#19
Tungsten Naturally Agitated Join Date: Mar 2005 Location: Nashville, TN Posts: 810	Re: Jumpiness when starting out on a cold engine? Mine does this as well. Taking it soon for the windshield "wind noise" TSB and will add this TSB to it also. __________________ 2003 Mach1 - Dark Shadow Grey - 5 Speed ~ Born on May 12, 2003 at 12:38pm ~ 2004 F250 SuperCrew 4X4 6.0L PowerStroke Turbo Diesel

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