Car misses on start up.

MiKeYbAnKs3435 · June 15th, 2009, 10:24 PM

My 95 5.0 gt seems to miss when i take off in 60/70 degree weather or less. Its fine when it gets warmed up, but before my engine warms up it runs funny and kinda sputters a little bit until I get up to speed. People Iv asked have told me there might be something wrong with the wires. Right now I have auto light wires. Any suggestions on how to fix this problem?

Lind · June 15th, 2009, 10:30 PM

your car will run rich until it reaches operating tempature, the computer tells it to dump more gas in

WildWill · June 16th, 2009, 07:21 AM

Mine does the exact same thing... We just need to let our cars warm up a little before driving off after start off. When you turn it on, you just need to let it run at idle for about a minute then you should be good. Just as Lind said, it's running rich while it's warming up, so just let it warm up. It's not a big deal.

1slo5.0 · June 16th, 2009, 01:10 PM

Scan for codes and see what if anything shows up. Some ECT test might be needed as well. This is not normal.

MiKeYbAnKs3435 · June 16th, 2009, 10:51 PM

Tried the scan tool, couldn't find anything. I have been letting it warm up but I just think it's odd because it never did that before.

1slo5.0 · June 16th, 2009, 11:17 PM

Originally Posted by MiKeYbAnKs3435

Tried the scan tool, couldn't find anything. I have been letting it warm up but I just think it's odd because it never did that before.

Is there any metal type dust in the bottom of the distributor when you pull the cap off?

Bullitt95 · June 17th, 2009, 08:28 AM

If the engine only acts up when it's cold and runs normally when warm, the chances are that either the ECT or ACT sensor (or the wiring to them) is faulty. Have them both tested.

MikeJones · June 17th, 2009, 04:17 PM

my 5.0 HO start up fine cold but has trouble starting up after its warm :S

MiKeYbAnKs3435 · June 28th, 2009, 07:43 PM

I scanned for codes. Code 543 showed up, something to do with the fuel pump. Could that be the problem?

June 15th, 2009, 10:24 PM	#1
MiKeYbAnKs3435 Regular 2001 SVT cobra N/A Join Date: Jun 2009 Location: Kirkwood Posts: 124 iTrader: 0 reviews	Car misses on start up. My 95 5.0 gt seems to miss when i take off in 60/70 degree weather or less. Its fine when it gets warmed up, but before my engine warms up it runs funny and kinda sputters a little bit until I get up to speed. People Iv asked have told me there might be something wrong with the wires. Right now I have auto light wires. Any suggestions on how to fix this problem? __________________ Imports are like tampons. Every pussy's got one.

June 15th, 2009, 10:30 PM	#2
Lind Enthusiast 1994 Ford Mustang GT Join Date: Sep 2006 Location: Shawano, WI Posts: 579 iTrader: 0 reviews	your car will run rich until it reaches operating tempature, the computer tells it to dump more gas in __________________ www.moddedmustangs.com

June 16th, 2009, 07:21 AM	#3
WildWill Hardcore Enthusiast 1995 Mustang GT Join Date: Oct 2007 Location: Solomons, MD Posts: 1,112 iTrader: 0 reviews	Mine does the exact same thing... We just need to let our cars warm up a little before driving off after start off. When you turn it on, you just need to let it run at idle for about a minute then you should be good. Just as Lind said, it's running rich while it's warming up, so just let it warm up. It's not a big deal. __________________ GT40p heads, 1.7 crane RR's, GT40 u/l, MAC LTs, MAC o/r h-pipe, Flowmaster 40s, 65mm t/b, '03 Cobra Bilstein Struts, Tokico Bullitt Shocks, MM c/c plates, Eibach Sportlines, B&M shifter, 255lph f/p, RAM p/g clutch, Fidanza alum fly, rebuilt t-5

June 16th, 2009, 01:10 PM	#4
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Scan for codes and see what if anything shows up. Some ECT test might be needed as well. This is not normal. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

June 16th, 2009, 10:51 PM	#5
MiKeYbAnKs3435 Regular 2001 SVT cobra N/A Join Date: Jun 2009 Location: Kirkwood Posts: 124 iTrader: 0 reviews	Tried the scan tool, couldn't find anything. I have been letting it warm up but I just think it's odd because it never did that before. __________________ Imports are like tampons. Every pussy's got one.

June 17th, 2009, 08:28 AM	#7
Bullitt95 Hardcore Enthusiast 1995 Mustang GT auto 13.546 @ 105.32 Join Date: Apr 2007 Location: Al Ain, UAE Posts: 1,452 iTrader: 0 reviews	If the engine only acts up when it's cold and runs normally when warm, the chances are that either the ECT or ACT sensor (or the wiring to them) is faulty. Have them both tested. __________________ 243.5rwhp/284.2rwtq Mod list in My Garage

June 17th, 2009, 04:17 PM	#8
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,913 iTrader: 0 reviews	my 5.0 HO start up fine cold but has trouble starting up after its warm :S

June 28th, 2009, 07:43 PM	#9
MiKeYbAnKs3435 Regular 2001 SVT cobra N/A Join Date: Jun 2009 Location: Kirkwood Posts: 124 iTrader: 0 reviews	I scanned for codes. Code 543 showed up, something to do with the fuel pump. Could that be the problem? __________________ Imports are like tampons. Every pussy's got one.

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