Car dies when I come to a stop

TMASTER · 06-27-2003, 01:17 AM

My 93 GT just dies when i come to a stop from driving it. It doesn't sputter or miss, or act like fuel. It just dies very suddenly. Then I start it right back up and it drives normal. Also the Check engine light and Battery light come on when it dies. But both go away when i start it back up.
What could it be, its happend to me 3 times already

Also my clutch pedal has been clicking off and on for months now, when i press in.

Sonics2042 · 06-27-2003, 12:53 PM

Do you have an aftermarket cam?

Thanks,
DoranW

TMASTER · 06-27-2003, 01:10 PM

Stock cam. I have the idle at 750-800rpms

PKRWUD · 06-28-2003, 08:57 AM

Could be a sticky EGR valve.

Take care,
~Chris

fiveohpatrol · 06-28-2003, 10:34 AM

or a sticky IAC

PKRWUD · 06-28-2003, 11:07 AM

Quote:

Originally posted by fiveohpatrol
or a sticky IAC

True, but as the engine warms up, it relies less and less on the IAC. Still, worth looking at.

Take care,
~Chris

TMASTER · 06-30-2003, 12:18 PM

Now the Battery light is flickering off and on, everytime i drive now. And it died again. The alt gauge is normal all the time

replaced the IAC
New alternator
New battery

could it be a short somewhere?

fiveohpatrol · 06-30-2003, 12:34 PM

Have you checked your TPS voltage? It should be between .90-.95V or so. Check it across the green and the black wires with the key on and engine off.

Also, try unplugging your EGR valve and driving it. It may throw some codes at you, but you'll be able to see if thats the culprit or not.

TMASTER · 06-30-2003, 12:40 PM

unplug where? the connector on the back? TPS voltage at .98 volts. Would that make the battery light flicker? heh.

PKRWUD · 07-03-2003, 03:36 PM

What is the voltage at the battery when the engine is off? Engine running? Engine running with headlights on high, a/c on w/ fan on high?

To check and see if it's the EGR, you would need to unplug the vacuum hose, not the electrical connector, and plug it.

Take care,
~Chris

TMASTER · 07-03-2003, 10:29 PM

The alternator was bad, i just replaced it. But the car died on my again today, i guess thats not the problem. But this time it died, it too longer and i had to gas it to keep it going but it died still.

also replaced the IAC.

mustangII460 · 07-03-2003, 11:10 PM

Don't stop.

That was a easy one, next question please.

PKRWUD · 07-04-2003, 01:37 PM

Check your fuel pressure.

TMASTER · 07-04-2003, 04:50 PM

Fuel Pressure Regulator is at 40.5 Psi with vacuum off.

I was at the Dyno Yesterday and put the pressure down from 42psi to 40.5psi. and i made 3ft-Lb's of tourqe more than at 42.
and they said my A/F was 12:1 at 42psi

Whats funney is my stock regualtor runs at 45psi vacuum off.
I did a whole lot of mods. Then had to get a adjustable FPR to back the pressure off LOL.

PKRWUD · 07-05-2003, 12:44 AM

And it's still stalling when you come to a stop? Does it do it every time, or only when getting off the freeway, lets say?

jimberg · 07-05-2003, 02:51 AM

What happened with the EGR valve test? Does it still stall with the EGR vacuum line disconnected? Does it start hard or start right up after it stalls?

You mentioned your clutch pedal clicking. Does it shift hard?

You may also want to make sure that your plug wires are secure. If one is loose, it could be moving forward as you brake causing it to arc on a header.

Are you running your A/C? Does it matter if your A/C is on or off?

Fuel pressure will only affect air/fuel ratio until the computer adapts. 45 isn't all that high and dialing it back wasn't really necessary, but getting a new FPR probably eliminates that as a potential problem. Sorry, it's just a pet peeve with me. Especially if the guy at the dyno leads you to believe that you can adjust your air/fuel ratio with an adjustable FPR.

TMASTER · 07-06-2003, 06:18 PM

JimBerg:

THe car runs like normal when the EGR vacuum line is off, doesnt die. All new wires and plugs also.

The last 3 times the car has died, The AC has been on!!! The last time it died, i was going 30mph, when i down shifted into 4th.
I turn the AC off and it starts right back up and goes normally.

HotRoddin · 07-06-2003, 06:38 PM

Quote:

Originally posted by TMASTER
THe car runs like normal when the EGR vacuum line is off, doesnt die.

Don't overthink things. Read the line above that YOU wrote.

Now with the vacuum line off, if you mess with the A/C and all the other things and it still doesn't die, then you're going right past the problem.

PKRWUD · 07-06-2003, 07:43 PM

Quote:

Originally posted by PKRWUD
Could be a sticky EGR valve.

Take care,
~Chris

Dude. Come on. You're not gonna make me draw you a picture too, are you?

Take care,
~Chris

jimberg · 07-06-2003, 08:37 PM

If you have a vacuum gauge, hook it up to the line going to the EGR valve. It should read 0 vacuum at idle. If it doesn't, you need a new EGR vacuum regulator (EVR) solenoid (It's mounted on the back of the passenger side strut tower), if it does read 0, you probably need a new EGR valve.

As for the A/C being on, that was just a question to consider if the EGR valve test yielded nothing. It definitely sounds like the EGR test yielded something, so you should fix that before moving on to something else.

Let us know what you find out.

06-27-2003, 01:17 AM	#1
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	Car dies when I come to a stop My 93 GT just dies when i come to a stop from driving it. It doesn't sputter or miss, or act like fuel. It just dies very suddenly. Then I start it right back up and it drives normal. Also the Check engine light and Battery light come on when it dies. But both go away when i start it back up. What could it be, its happend to me 3 times already Also my clutch pedal has been clicking off and on for months now, when i press in.

06-27-2003, 12:53 PM	#2
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	Do you have an aftermarket cam? Thanks, DoranW __________________ What I have: 1990 Red Mustang 5.0 LX: [BBK X-Pipe]-[MAC Cat-Back Exhaust] [MAC Cold Air Intake]-[BBK Equal Shorties] [3.55 Gears]-[Cobra Intake Manifold (Upper and Lower] [E-303 Cam]-[Granetelli Mass Air Flow Sensor] [Front and rear sway bars]-[New black carpet and seats.] [Adjustable Fuel Regulator]-[T5 Conversion w/ K. Cobra Clutch/Hurst STS] [Cobra Throttle Body]-[130A Alt. Conversion] Thinking about: Aftermarket Heads! Vortech A-Trim

06-27-2003, 01:10 PM	#3
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	no Stock cam. I have the idle at 750-800rpms

06-28-2003, 08:57 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Could be a sticky EGR valve. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-28-2003, 10:34 AM	#5
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	or a sticky IAC __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

06-30-2003, 12:18 PM	#7
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	getting worse Now the Battery light is flickering off and on, everytime i drive now. And it died again. The alt gauge is normal all the time replaced the IAC New alternator New battery could it be a short somewhere?

06-30-2003, 12:34 PM	#8
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Have you checked your TPS voltage? It should be between .90-.95V or so. Check it across the green and the black wires with the key on and engine off. Also, try unplugging your EGR valve and driving it. It may throw some codes at you, but you'll be able to see if thats the culprit or not. __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

06-30-2003, 12:40 PM	#9
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	hmm unplug where? the connector on the back? TPS voltage at .98 volts. Would that make the battery light flicker? heh.

07-03-2003, 03:36 PM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	What is the voltage at the battery when the engine is off? Engine running? Engine running with headlights on high, a/c on w/ fan on high? To check and see if it's the EGR, you would need to unplug the vacuum hose, not the electrical connector, and plug it. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-03-2003, 10:29 PM	#11
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	The alternator was bad, i just replaced it. But the car died on my again today, i guess thats not the problem. But this time it died, it too longer and i had to gas it to keep it going but it died still. also replaced the IAC.

07-03-2003, 11:10 PM	#12
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	Don't stop. That was a easy one, next question please. __________________ Frank

07-04-2003, 01:37 PM	#13
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Check your fuel pressure. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-04-2003, 04:50 PM	#14
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	hmmm Fuel Pressure Regulator is at 40.5 Psi with vacuum off. I was at the Dyno Yesterday and put the pressure down from 42psi to 40.5psi. and i made 3ft-Lb's of tourqe more than at 42. and they said my A/F was 12:1 at 42psi Whats funney is my stock regualtor runs at 45psi vacuum off. I did a whole lot of mods. Then had to get a adjustable FPR to back the pressure off LOL.

07-05-2003, 12:44 AM	#15
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	And it's still stalling when you come to a stop? Does it do it every time, or only when getting off the freeway, lets say? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-05-2003, 02:51 AM	#16
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	What happened with the EGR valve test? Does it still stall with the EGR vacuum line disconnected? Does it start hard or start right up after it stalls? You mentioned your clutch pedal clicking. Does it shift hard? You may also want to make sure that your plug wires are secure. If one is loose, it could be moving forward as you brake causing it to arc on a header. Are you running your A/C? Does it matter if your A/C is on or off? Fuel pressure will only affect air/fuel ratio until the computer adapts. 45 isn't all that high and dialing it back wasn't really necessary, but getting a new FPR probably eliminates that as a potential problem. Sorry, it's just a pet peeve with me. Especially if the guy at the dyno leads you to believe that you can adjust your air/fuel ratio with an adjustable FPR. __________________ 351W 89 Mustang GT Convertible

07-06-2003, 06:18 PM	#17
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	still dieing JimBerg: THe car runs like normal when the EGR vacuum line is off, doesnt die. All new wires and plugs also. The last 3 times the car has died, The AC has been on!!! The last time it died, i was going 30mph, when i down shifted into 4th. I turn the AC off and it starts right back up and goes normally.

07-06-2003, 08:37 PM	#20
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	If you have a vacuum gauge, hook it up to the line going to the EGR valve. It should read 0 vacuum at idle. If it doesn't, you need a new EGR vacuum regulator (EVR) solenoid (It's mounted on the back of the passenger side strut tower), if it does read 0, you probably need a new EGR valve. As for the A/C being on, that was just a question to consider if the EGR valve test yielded nothing. It definitely sounds like the EGR test yielded something, so you should fix that before moving on to something else. Let us know what you find out. __________________ 351W 89 Mustang GT Convertible

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