Car starts, then dies.

Nightmare · December 17th, 2008, 07:03 PM

I have a 99 GT that will only start if I floor it and when I let off the gas it dies. I kept my foot on the gas until the motor was completely warmed up thinking that it was just cold because it has been below zero here for about four days. Today it was about 10 outside and the car sits outside. The car has never had an issue starting in cold weather in the past, this just started. I disconnected the battery for about ten minutes as I pulled the sensors out of the intake think the computer needed to be reset but that didn't help. I spoke with a mechanic and he thought it was the fuel pump or an intake sensor on top of the intake manifold. He said it would run about $500 for the pump and installation. How hard are fuel pumps to install in this car, because I may try that myself. The only thing that is holding me back is that if it's not the pump I'm out $150 for the part and back to square one. Anyone have any advice or thoughts on what could be happening?

bbk03gt24 · December 17th, 2008, 07:12 PM

car will not stay running at times what could it be ???

I thought that this discussion might be of interest to you and your situation...

ajm · December 17th, 2008, 07:22 PM

You can get a svt focus pump for about $100. Putting it in doesnt take much. If that isnt your problem well atleast you now have an upgraded fuel pump rather than buying the one thats already in there.

Nightmare · December 17th, 2008, 08:25 PM

Originally Posted by bbk03gt24

car will not stay running at times what could it be ???

I thought that this discussion might be of interest to you and your situation...

Problem solved.....for now, lol. After reading the thread you posted I went outside and unplugged the iac, cleaned it out and plugged it back in and the car fired up immediately and idles perfectly. Thanks again, this site is full of knowledgeable and helpful people.

unblock · December 17th, 2008, 10:58 PM

i had the same problem 1 week ago happend cus i had sum dirt in the gas tank which made the injectors go bad , used injector cleaner and the car is better than before now

malog4 · December 25th, 2011, 07:34 PM

I am having the same problem only does it in cold weather cleaned kn filter throttle body help for a few day also rxp now doing it again. my question is what is a iac and were is it located at. Help

Cabikejumper · December 25th, 2011, 08:42 PM

What the iac looks like

Connects to the plenum.

malog4 · December 25th, 2011, 09:04 PM

Thank you for the help I will try that.

December 17th, 2008, 07:03 PM	#1
Nightmare Newbie Join Date: May 2007 Posts: 18 iTrader: 0 reviews	Car starts, then dies. I have a 99 GT that will only start if I floor it and when I let off the gas it dies. I kept my foot on the gas until the motor was completely warmed up thinking that it was just cold because it has been below zero here for about four days. Today it was about 10 outside and the car sits outside. The car has never had an issue starting in cold weather in the past, this just started. I disconnected the battery for about ten minutes as I pulled the sensors out of the intake think the computer needed to be reset but that didn't help. I spoke with a mechanic and he thought it was the fuel pump or an intake sensor on top of the intake manifold. He said it would run about $500 for the pump and installation. How hard are fuel pumps to install in this car, because I may try that myself. The only thing that is holding me back is that if it's not the pump I'm out $150 for the part and back to square one. Anyone have any advice or thoughts on what could be happening?

December 17th, 2008, 07:12 PM	#2
bbk03gt24 Regular 2003 Cobra Join Date: Jul 2008 Location: Winston-Salem, NC Posts: 219 iTrader: 1 reviews	car will not stay running at times what could it be ??? I thought that this discussion might be of interest to you and your situation... __________________ 2003 Cobra Stock as of now...

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December 17th, 2008, 07:22 PM	#3
ajm Banned Join Date: May 2008 Posts: 7,966 iTrader: 4 reviews	You can get a svt focus pump for about $100. Putting it in doesnt take much. If that isnt your problem well atleast you now have an upgraded fuel pump rather than buying the one thats already in there.

December 17th, 2008, 10:58 PM	#5
unblock Regular Join Date: May 2007 Posts: 116 iTrader: 0 reviews	i had the same problem 1 week ago happend cus i had sum dirt in the gas tank which made the injectors go bad , used injector cleaner and the car is better than before now

December 25th, 2011, 07:34 PM	#6
malog4 Newbie 2000 Mustang GT Join Date: Oct 2011 Location: Garland Texas Posts: 2 iTrader: 0 reviews	I am having the same problem only does it in cold weather cleaned kn filter throttle body help for a few day also rxp now doing it again. my question is what is a iac and were is it located at. Help

December 25th, 2011, 09:04 PM	#8
malog4 Newbie 2000 Mustang GT Join Date: Oct 2011 Location: Garland Texas Posts: 2 iTrader: 0 reviews	Thank you for the help I will try that.

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