4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Car Shut off Doing 80ish

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Old 06-29-2009, 07:30 AM
  #1  
72MachOne99GT
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Default Car Shut off Doing 80ish

I had IAC issues a few years back, but after a cleaning and reassembly everything went back to normal.

I was beating the car a bit the other day and was doing about 80 in 4th, shifted to nuetral and noticed the car pulling to the right and it was difficult to pull back over to the center of the road and the brakes were dead.

I knew right away the car had died. So, luckily I was in the middle of nowhere when I beat on my car and I coasted to a stop, restarted the car and everything is fine.

Initially I thought maybe the RPMs were dropping way to fast for the rest of the day, but that's seemed to have stopped as well.

Any ideas?
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Old 06-29-2009, 07:59 AM
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JayC
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Shifting to neutral made the ECM shut the engine down. This can be fixed with a custom tune or just don't shift to neutral.
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Old 06-29-2009, 09:19 AM
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72MachOne99GT
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It's a 5sp, I have to be in neutral at SOME point. lol
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Old 06-29-2009, 09:44 AM
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Originally Posted by 72MachOne99GT
It's a 5sp, I have to be in neutral at SOME point. lol
Just be quick about it..... lol
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Old 06-29-2009, 11:20 AM
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72MachOne99GT
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thanks for the advice !

lol

i was wondering if it could be a vacuum leak because I noticed earlier that day the car was idling/holding low rpms...and later that day between shifts it was dropping quickly instead of hanging up like they usually do

*i havent done any IAC mods either*
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Old 06-29-2009, 12:46 PM
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dvs_03gt
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Originally Posted by 72MachOne99GT
thanks for the advice !

lol

i was wondering if it could be a vacuum leak because I noticed earlier that day the car was idling/holding low rpms...and later that day between shifts it was dropping quickly instead of hanging up like they usually do

*i havent done any IAC mods either*
my vehicle did something similar, how do i check for those vac leaks??

refer to my post its on the main page " HUGE TECH PROBLEM "
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