'02 V6 will not stay running. Help.

mattl2186 · December 12th, 2011, 08:05 AM

Hi everyone, I am new to the site. I have a 2002 V6, automatic. A week ago the car would not start at all, so we cured that with putting a new battery in. The old one was shot, started up fine and drove for the past week. Now, the car starts BUT will not stay running if I don't keep the gas pedal pressed. As soon as I let off of the gas, it will shut off. I cannot detect what the problem could be. Thanks in advance to any help or suggestions.

dgt_mustang · December 12th, 2011, 09:41 AM

Does it sound like its going to die before it dies or does it just cut out like you turned it off?

mattl2186 · December 12th, 2011, 10:00 AM

It just will cut out like I turned it off. I've pretty much ruled PATS out of the picture because it's functioning like it should, no blinking, etc.

thomasdale2144 · December 12th, 2011, 10:36 AM

vacuum leak?

dgt_mustang · December 12th, 2011, 10:44 AM

IAC maybe

xtreme 2 · December 12th, 2011, 10:45 AM

does it do this immediately? Like if you just turn the key it will fire up then die back down?

Have you made any other changes since the battery?

Tang Stang · December 12th, 2011, 12:56 PM

Verify that the IAC is plugged in. Then clean and inspect the IAC and report back. No CEL, right?

MustangV6Man? · December 12th, 2011, 04:19 PM

Sounds like vacuum leak, but you should definitely try cleaning the MAF/IAC.

eleanorGT · December 12th, 2011, 05:18 PM

all above, plus checl the bolt on the throttle body.. if its broken, or screwed out all the way... it will stall the engine due to lack of air for idle.

StoneColdStang · December 13th, 2011, 02:25 AM

Originally Posted by mattl2186

Hi everyone, I am new to the site. I have a 2002 V6, automatic. A week ago the car would not start at all, so we cured that with putting a new battery in. The old one was shot, started up fine and drove for the past week. Now, the car starts BUT will not stay running if I don't keep the gas pedal pressed. As soon as I let off of the gas, it will shut off. I cannot detect what the problem could be. Thanks in advance to any help or suggestions.

ALTERNATOR. Problem solved. Same thing happen to me

dgt_mustang · December 13th, 2011, 08:38 AM

Usually good to rule some things out before jumping straight to a conclusion.

Possible culprits:
Alternator
Vacuum leak
IAC
Fuel filter could be clogged enought that more throttle actions gives greater force to push through sludge.
Gremlins
maybe TPS?? <----someone else could chime in on this one.

iPAPKE · December 13th, 2011, 03:44 PM

Sounds like an ignition problem to me, for sure. Wouldnt a vacuum leak give you more of a pretty rough\jerky idle.

MRKsD3 · December 15th, 2011, 01:29 AM

ALTERNATOR.

MRKsD3 · December 15th, 2011, 01:31 AM

Your car was just running on the new battery's power all those days... Alternator wasn't charging... Same prob I had today.

December 12th, 2011, 08:05 AM	#1
mattl2186 Newbie Join Date: Dec 2011 Posts: 2 iTrader: 0 reviews	'02 V6 will not stay running. Help. Hi everyone, I am new to the site. I have a 2002 V6, automatic. A week ago the car would not start at all, so we cured that with putting a new battery in. The old one was shot, started up fine and drove for the past week. Now, the car starts BUT will not stay running if I don't keep the gas pedal pressed. As soon as I let off of the gas, it will shut off. I cannot detect what the problem could be. Thanks in advance to any help or suggestions.

December 12th, 2011, 10:36 AM	#4
thomasdale2144 Enthusiast 96 GT with 97 cobra swap 13.65@101.3 Join Date: Sep 2010 Location: Plymouth, MN Posts: 684 iTrader: 0 reviews	vacuum leak? __________________ 1999 V6 CAI, Tune (Sold) 1996 GT Vert 97 Cobra Engine Swap, Mods in Garage 248.8 RWHP, 353.3RWTQ But having a 4V makes it a Cobra Want to join the FOBRA club? MM FOBRA CLUB FOUNDER

December 12th, 2011, 10:45 AM	#6
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	does it do this immediately? Like if you just turn the key it will fire up then die back down? Have you made any other changes since the battery? __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

December 12th, 2011, 12:56 PM	#7
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	Verify that the IAC is plugged in. Then clean and inspect the IAC and report back. No CEL, right? __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

December 15th, 2011, 01:29 AM	#13
MRKsD3 Wing on, wing off... JULY 2011 ROTM Join Date: Apr 2009 Location: Compton, CA Posts: 4,234 iTrader: 0 reviews	ALTERNATOR. __________________ SIG BY WABASHACOBRA99

December 12th, 2011, 10:00 AM	#3
mattl2186 Newbie Join Date: Dec 2011 Posts: 2 iTrader: 0 reviews	It just will cut out like I turned it off. I've pretty much ruled PATS out of the picture because it's functioning like it should, no blinking, etc.

December 12th, 2011, 04:19 PM	#8
MustangV6Man? Enthusiast Join Date: May 2010 Location: USA Posts: 664 iTrader: 1 reviews	Sounds like vacuum leak, but you should definitely try cleaning the MAF/IAC.

December 12th, 2011, 05:18 PM	#9
eleanorGT Regular 2001 Mustang 3.8 Join Date: Nov 2010 Location: Malden, MA Posts: 286 iTrader: 0 reviews	all above, plus checl the bolt on the throttle body.. if its broken, or screwed out all the way... it will stall the engine due to lack of air for idle.

December 13th, 2011, 03:44 PM	#12
iPAPKE iPoopke Regular 2004 Mustang Join Date: Aug 2011 Location: Michigan Posts: 844 iTrader: 0 reviews	Sounds like an ignition problem to me, for sure. Wouldnt a vacuum leak give you more of a pretty rough\jerky idle.

December 15th, 2011, 01:31 AM	#14
MRKsD3 Wing on, wing off... JULY 2011 ROTM Join Date: Apr 2009 Location: Compton, CA Posts: 4,234 iTrader: 0 reviews	Your car was just running on the new battery's power all those days... Alternator wasn't charging... Same prob I had today. __________________ SIG BY WABASHACOBRA99

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