This is topic 04 GT motor dies off in forum Tech Talk at Northern California Ford Owners  .


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Posted by SWOLBRA (Member # 10274) on :
 
When driving around and letting the rpms go down or while braking or reving, the motor cuts off. Then I would have to start up the motor again with no issues starting. Fuel primes up, so I’m thinking it could be the alternator going out or possibly ignition coil?

It’s a 04 Mustang GT automatic.

Thanks for your input.
 

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Posted by naked5.0notch (Member # 14058) on :
 
Check the vehicle speed sensor, my friends 99 gt 5 speed would stall sometime coming to a stop sign or light. This could be related to your concern
 

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Posted by sic70stang (Member # 4347) on :
 
definitely not alternator or coils.
 

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Posted by fredfifty (Member # 10320) on :
 
check grounds
 

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Posted by SWOLBRA (Member # 10274) on :
 
Thanks for ya input. It was the idle air control valve.

[ 2020-01-17, 12:30 AM: Message edited by: TrillaJay ]
 

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Posted by KevinK (Member # 9234) on :
 
My Mach 1 was doing that. Could not get it out of the driveway most days. It was a bad fuel pump. Check the fuel pressure.
 

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Posted by TrillaJay (Member # 10274) on :
 
Car is acting up again. I changed the idle air sensor earlier, worked out for a while but now it’s cutting off while breaking again, not every time but at random, and the electrical is still on.
 

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Posted by NK2186 (Member # 12319) on :
 
spray brake clean on a lint free rag and open the throttle body and clean the carbon buildup out where the blade seats. carbon buildup will cause this problem. removing the throttle body and using a toothbrush is a good way to do it too.
 

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Posted by 98 ROUSH (Member # 10309) on :
 
Bad fuel pump. It’s going out
 

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