Stang Stalls while braking and idleing

Tscott · January 16th, 2007, 11:12 AM

Hello all, new here. I did a search on this and found a possible answer, but just wanted some more input.

The problem is this, for a while now my 99 has been stalling while braking with my foot off the clutch and the engine at idle. It only used to do it while braking hard with my foot off the clutch, so I lived with it and just make sure I downshift. Then it started to do it at idle, it will start to idle irradically. the idle will drop to 500 or so then jumpt to 1500 and eventually it will stall. Lately, it has been doing it on startup.. the engine will fire perfect then just drop out. I can keep it going if I get on the gas quick, but now its becoming a PIA and I am the only one who can drive the car because no one knows how to drive it with these quirks.

the car is stock except for an offroad Xpipe I installed a while back and a set of o2 sensor simulators, and that is it.

From the search i did, I figured my first step would be to clean the idle air control valve and if that fails then i will replace it.

Do I have the problem figured out or is it something else?

Thanks,
Tom

Casper98GT · January 16th, 2007, 11:27 AM

IAC is a good guess. Go with it :wink

acmillr · January 16th, 2007, 11:29 AM

Its those damn simulators..

I had the exact same problem. I got the o/r x-pipe and simulators. It ran great for a while then started experiencing the same problems you are talking about. I origionally suspected my my IAC as well. However, that turned out to not be the problem. I ended up ordering a diablo tuner and turned the rear o2 sensors off. That stopped all the bullshit.

Casper98GT · January 16th, 2007, 11:31 AM

So the car has been running ok since how long ago? Because if you put the o2 sim.s in a while back it wouldnt be the problem right now.

acmillr · January 16th, 2007, 11:34 AM

That's what I'm saying...

It was like the computer learned a way through the simulators or something. I had them on for almost two months before they started giving me trouble.

ibanez570x · January 16th, 2007, 12:30 PM

where did you get your simulators? since it seems like we have the same problem here maybe its the simulators?

Barrier · January 16th, 2007, 01:10 PM

I've been having the same problem... I have a MAC O/R and simulators. I'll try just turning the O2s off with the diablo and unhooking my sims

acmillr · January 16th, 2007, 01:19 PM

rpmoutlet.com

Tscott · January 16th, 2007, 01:26 PM

I ran for a while without the simulators, and of course I got the engine light. I still had the stall problem. I dont think it is the sims in my case, as the problem has gotten progressively worse over time. I will eventually source a tuner as well and just turn off the O2 sensors and other such stuff to the computer

Thanks,
Tom

ibanez570x · January 16th, 2007, 02:01 PM

ok so this is 3 of us with an O/R and sims with the same problem.... So its gotta be something there... Do I need to undo my sims before and use the tuner? Or can I just leave them on there since they are a pain in the ass..?

Casper98GT · January 16th, 2007, 10:01 PM

Thats weird everyone having problems. I guess im lucky. Still on 2 yrs with the sims i bought from steeda.

January 16th, 2007, 11:12 AM	#1
Tscott Newbie Join Date: Jan 2007 Posts: 2	Stang Stalls while braking and idleing Hello all, new here. I did a search on this and found a possible answer, but just wanted some more input. The problem is this, for a while now my 99 has been stalling while braking with my foot off the clutch and the engine at idle. It only used to do it while braking hard with my foot off the clutch, so I lived with it and just make sure I downshift. Then it started to do it at idle, it will start to idle irradically. the idle will drop to 500 or so then jumpt to 1500 and eventually it will stall. Lately, it has been doing it on startup.. the engine will fire perfect then just drop out. I can keep it going if I get on the gas quick, but now its becoming a PIA and I am the only one who can drive the car because no one knows how to drive it with these quirks. the car is stock except for an offroad Xpipe I installed a while back and a set of o2 sensor simulators, and that is it. From the search i did, I figured my first step would be to clean the idle air control valve and if that fails then i will replace it. Do I have the problem figured out or is it something else? Thanks, Tom

January 16th, 2007, 11:27 AM	#2
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,317	IAC is a good guess. Go with it :wink __________________ Ford/Toyota tech. -93 LX, X303 heads, F-cam, Trickflow u/l, 1.6 RR, FR wires, MSD cap/rotor, Elec. fan, a/c delete, smog delete, sn95 fuel rails with BBK regulator, 75mm TB and EGR, Vortech S-trim w/intercooler, 42lb inj/PMAS, 3.55's -

January 16th, 2007, 11:31 AM	#4
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,317	So the car has been running ok since how long ago? Because if you put the o2 sim.s in a while back it wouldnt be the problem right now. __________________ Ford/Toyota tech. -93 LX, X303 heads, F-cam, Trickflow u/l, 1.6 RR, FR wires, MSD cap/rotor, Elec. fan, a/c delete, smog delete, sn95 fuel rails with BBK regulator, 75mm TB and EGR, Vortech S-trim w/intercooler, 42lb inj/PMAS, 3.55's -

January 16th, 2007, 01:10 PM	#7
Barrier Regular Join Date: Dec 2006 Posts: 60	I've been having the same problem... I have a MAC O/R and simulators. I'll try just turning the O2s off with the diablo and unhooking my sims __________________ 99 Dark Green Satin Mustang GT conv K&N CAI; MAC O/R H-Pipe; Flowmaster 40s; FRPP 13lb flywheel; Motive 3.90s; Diablosport tuner; Eibach Prokit springs; Tokico Dspec shocks/struts 13.805 @ 100.23, 1.97 60'

January 16th, 2007, 10:01 PM	#11
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,317	Thats weird everyone having problems. I guess im lucky. Still on 2 yrs with the sims i bought from steeda. __________________ Ford/Toyota tech. -93 LX, X303 heads, F-cam, Trickflow u/l, 1.6 RR, FR wires, MSD cap/rotor, Elec. fan, a/c delete, smog delete, sn95 fuel rails with BBK regulator, 75mm TB and EGR, Vortech S-trim w/intercooler, 42lb inj/PMAS, 3.55's -

January 16th, 2007, 12:30 PM	#6
ibanez570x Regular Join Date: Oct 2006 Location: Maryland Posts: 204	where did you get your simulators? since it seems like we have the same problem here maybe its the simulators?

January 16th, 2007, 01:26 PM	#9
Tscott Newbie Join Date: Jan 2007 Posts: 2	I ran for a while without the simulators, and of course I got the engine light. I still had the stall problem. I dont think it is the sims in my case, as the problem has gotten progressively worse over time. I will eventually source a tuner as well and just turn off the O2 sensors and other such stuff to the computer Thanks, Tom

January 16th, 2007, 02:01 PM	#10
ibanez570x Regular Join Date: Oct 2006 Location: Maryland Posts: 204	ok so this is 3 of us with an O/R and sims with the same problem.... So its gotta be something there... Do I need to undo my sims before and use the tuner? Or can I just leave them on there since they are a pain in the ass..?

Threads Similar to: Stang Stalls while braking and idleing
Thread	Thread Starter	Forum	Replies	Last Post
Car almost stalls	ryanhewett466	5.0 Mustangs	7	November 8th, 2007 08:12 PM
Battery light comes on, voltmeter drops when idleing	BigBlockFairlane	2.3 Mustangs	5	November 6th, 2007 08:16 PM
car stalls when hot	tims3.8stang	V6 Mustangs	5	September 16th, 2007 11:45 PM
89 LX Idleing Funny Please Help	Steves LX	Engine	4	December 28th, 2006 05:29 PM
Car Stalls	stangliter04	Poweradders	7	July 17th, 2006 10:02 PM

All times are GMT -4. The time now is 06:12 AM.
Contact Us - Modded Mustangs - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2008, Jelsoft Ent. Ltd. & SEO by vBSEO 3.1.0 ©2007, Crawlability, Inc.