stalling problem i need help

greengoblin · April 2nd, 2009, 10:10 PM

Ok so i have been trying to figure out was it wrong with my 99 gt. when i come to a stop at a light or even in my driveway the car wants and does stall. some times it hesitates when accelerating. I have replaced the IAC, the egr is working good, new plugs, new fuel filter, i put long tube headers on it and mil eliminators on the 2nd set of o2 sensors. problem existed on a smaller scale before the headers. by the way it is a 5 speed. plz help me any ideas would be great. also forgot to add that when i come to a stop if it doesnt die with still idles erratically from a range of almost dying to revving up to almost 1500 rpm

ajm · April 2nd, 2009, 10:11 PM

Have you tried checking the coils with a dvom? Seems like youve covered all/most of the basics besides that. Also do you have a tune for your long tubes? Some people have had issues after putting on long tubes w/o a tune.

Lefty · April 2nd, 2009, 10:24 PM

MAF?

But maf would cause it to run shitty all the time...But it's a thought.

schwarzGT · April 2nd, 2009, 10:26 PM

I have seen this problem before and it turned out to be a bad manifold air pressure sensor or MAP sensor for short. It wasnt on a mustang though but if all else fails try that one.

Lefty · April 2nd, 2009, 10:28 PM

^Yeah Map sensor could screw with it.

(and it stands for Manifold Absolute Pressure

)

schwarzGT · April 2nd, 2009, 10:32 PM

Originally Posted by Lefty

^Yeah Map sensor could screw with it.

(and it stands for Manifold Absolute Pressure )

Roger copy....I was close!!

Willy Mo · April 2nd, 2009, 10:37 PM

I had a simular problem I broke down and took it to the dealer after weeks of not figuring it out. The dealer told me there was a technical service bulletin on the same problem. they said something was wrong with the ecu and had to be reflashed. they did it and it helped. but i later found out my problem was from my cdc shaker adding turbulence through the maf and makin it think there was a bunch of air goin through when threre reall wasnt.

Lefty · April 2nd, 2009, 10:38 PM

It's all good bro

Willy Mo · April 2nd, 2009, 10:41 PM

yeah but i would check the TSB's and see if that one applies to your car. it might be the problem. unless you have a cdc shaker setup, then i could tell you exactly how to fix it lol.

Fluffy The Rhino · April 2nd, 2009, 10:44 PM

My '03 GT did this completely stock. My Mach has done it since I got the K&N. Pisses me off. I'm just used to it and can keep it from stalling. *kicks car*

I hate my car today, just FYI.

FUCK IT.

Up it's ass.

Jobra · April 2nd, 2009, 10:49 PM

Originally Posted by FluffyTheRhino

My '03 GT did this completely stock. My Mach has done it since I got the K&N. Pisses me off. I'm just used to it and can keep it from stalling. *kicks car*

I hate my car today, just FYI.

FUCK IT.

Up it's ass.

Uh ok. Give it to me

Willy Mo · April 2nd, 2009, 10:50 PM

Originally Posted by FluffyTheRhino

My '03 GT did this completely stock. My Mach has done it since I got the K&N. Pisses me off. I'm just used to it and can keep it from stalling. *kicks car*

I hate my car today, just FYI.

FUCK IT.

Up it's ass.

my shaker setup didnt have the "baffel" in the airbox where the shaker tube comes in. so it forced the air through the drop in k&n i have and made turbulence past the maf. i had talked to many tuners before finding this out. I made a small baffel and all is good.

Fluffy The Rhino · April 2nd, 2009, 11:11 PM

Originally Posted by 04MustangGT

Uh ok. Give it to me

You ready to take some stuff out and replace the timing kit?

: D

Jobra · April 2nd, 2009, 11:14 PM

Flat rate of 50 and hour...

Lefty · April 2nd, 2009, 11:22 PM

*walks out of thread slowly*

greengoblin · April 3rd, 2009, 07:09 AM

thanks for all the input guys. i did forget to mention that i had already tested the maf sensor. where is the map sensor and does a mustang even have one i have heard they dont. also Rihno do you know of someone that has had this problem and had to replace the timing chain, i ask this becuase the car has 102000 miles on it and prolly need a new chain anyways.

SWEET2KSTANG · April 3rd, 2009, 07:16 AM

when my car does it, its always a vacum line. its always been either the iac or left side pcv hose was off or almost off.

greengoblin · April 3rd, 2009, 07:24 AM

thanks i will try that. also there is a tube running from the drivers side vavle cover into the air intake. does anyone know what this is and since it seems to be old and loose on my car could that be the cause of my problem

SWEET2KSTANG · April 3rd, 2009, 07:27 AM

that is what i am talking about. that is the drivers side pcv, and if leaking, it will cause the issue you talking about.

greengoblin · April 3rd, 2009, 07:32 AM

ic so should there be a valve in there or is it simply a tube

April 2nd, 2009, 10:10 PM	#1
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	stalling problem i need help Ok so i have been trying to figure out was it wrong with my 99 gt. when i come to a stop at a light or even in my driveway the car wants and does stall. some times it hesitates when accelerating. I have replaced the IAC, the egr is working good, new plugs, new fuel filter, i put long tube headers on it and mil eliminators on the 2nd set of o2 sensors. problem existed on a smaller scale before the headers. by the way it is a 5 speed. plz help me any ideas would be great. also forgot to add that when i come to a stop if it doesnt die with still idles erratically from a range of almost dying to revving up to almost 1500 rpm Last edited by greengoblin; April 2nd, 2009 at 10:14 PM. Reason: add some information

April 2nd, 2009, 10:24 PM	#3
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	MAF? But maf would cause it to run shitty all the time...But it's a thought. __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

April 2nd, 2009, 10:26 PM	#4
schwarzGT Regular 2003 GT Join Date: Jun 2008 Location: Bellevue, NE Posts: 111 iTrader: 0 reviews	I have seen this problem before and it turned out to be a bad manifold air pressure sensor or MAP sensor for short. It wasnt on a mustang though but if all else fails try that one. __________________ StangSuspension.com Series II 2 inch lowering springs, MM Caster Camber Plates, MM Strut Tower Brace, Steeda Bumpsteer Kit, Steeda Clutch Pedal Improvement Kit, Fidanza Aluminum Flywheel, Centerforce Dual Friction Clutch

April 2nd, 2009, 10:28 PM	#5
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	^Yeah Map sensor could screw with it. (and it stands for Manifold Absolute Pressure ) __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

April 2nd, 2009, 10:37 PM	#7
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	I had a simular problem I broke down and took it to the dealer after weeks of not figuring it out. The dealer told me there was a technical service bulletin on the same problem. they said something was wrong with the ecu and had to be reflashed. they did it and it helped. but i later found out my problem was from my cdc shaker adding turbulence through the maf and makin it think there was a bunch of air goin through when threre reall wasnt. __________________

April 2nd, 2009, 10:11 PM	#2
ajm Banned Join Date: May 2008 Posts: 7,966 iTrader: 4 reviews	Have you tried checking the coils with a dvom? Seems like youve covered all/most of the basics besides that. Also do you have a tune for your long tubes? Some people have had issues after putting on long tubes w/o a tune.

April 2nd, 2009, 10:38 PM	#8
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	It's all good bro __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

April 2nd, 2009, 10:41 PM	#9
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	yeah but i would check the TSB's and see if that one applies to your car. it might be the problem. unless you have a cdc shaker setup, then i could tell you exactly how to fix it lol. __________________

April 2nd, 2009, 10:44 PM	#10
Fluffy The Rhino Bearer of Bad News I has mustang and legacy. Slower than my Ruger. Join Date: Sep 2007 Location: The Fuckening Posts: 2,377 iTrader: 0 reviews	My '03 GT did this completely stock. My Mach has done it since I got the K&N. Pisses me off. I'm just used to it and can keep it from stalling. kicks car I hate my car today, just FYI. FUCK IT. Up it's ass. __________________ ~MOD NUTSWINGER~ My Tongue Soothes Razorburn STOPSAYINGFAIL.COM EVERY FART IS A GAMBLE Just Think Of Me As A White Blood Cell.

April 2nd, 2009, 11:14 PM	#14
Jobra Hardcore Enthusiast 2004 Cobra 7.4@97 Eaton Join Date: Jan 2009 Posts: 2,124 iTrader: 1 reviews	Flat rate of 50 and hour... __________________ NEW NUMBERS: 609/543

April 2nd, 2009, 11:22 PM	#15
Lefty Resident DJ '01 Cobra Vert. Join Date: Jun 2007 Location: Mechanicsburg, PA Posts: 28,699 iTrader: 12 reviews	walks out of thread slowly __________________ 2008 Acura TL Type-S (the daily) 2006 Yamaha R6 50th Anniversary Edition (the other toy)

April 3rd, 2009, 07:09 AM	#16
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	thanks for all the input guys. i did forget to mention that i had already tested the maf sensor. where is the map sensor and does a mustang even have one i have heard they dont. also Rihno do you know of someone that has had this problem and had to replace the timing chain, i ask this becuase the car has 102000 miles on it and prolly need a new chain anyways.

April 3rd, 2009, 07:16 AM	#17
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	when my car does it, its always a vacum line. its always been either the iac or left side pcv hose was off or almost off. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

April 3rd, 2009, 07:24 AM	#18
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	thanks i will try that. also there is a tube running from the drivers side vavle cover into the air intake. does anyone know what this is and since it seems to be old and loose on my car could that be the cause of my problem

April 3rd, 2009, 07:27 AM	#19
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	that is what i am talking about. that is the drivers side pcv, and if leaking, it will cause the issue you talking about. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

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April 3rd, 2009, 07:32 AM	#20
greengoblin Regular 1999 Mustang Gt Join Date: Apr 2009 Location: Sidney, OH Posts: 255 iTrader: 0 reviews	ic so should there be a valve in there or is it simply a tube

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