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Mustang Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible.
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Old 01-21-2021, 03:17 PM   #1
cheezer8
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2005 mustang 4.0 wont run

I have a 2005 Mustang 4.0 V6. last week we were cruising along at 40 mph and the car just stalled without warning. I let it coast for a mile or so , when we came to a stop I tried to fire up again and it started but only ran for 3-5 seconds and it stumbled and stalled. Iíve tried fire it up several times since and it does the same thing. I can hear the fuel pump engage each time I turn the key.
Iíve tried several things:
 Checked the relay
 Check all the wiring and connections
 Installed new MAF sensor
 Installed new fuel rail pressure sensor
 Installed new fuel pump driver module
 Cleaned throttle body
I guess the next thing would be a new fuel pump???
Does anyone have any other ideas?
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Old 01-22-2021, 08:23 AM   #2
65comet
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Re: 2005 mustang 4.0 wont run

No codes? Try a shot of starting fluid. If it won't run for a second or two on that, then it isn't fuel system related but spark. Make sure the starting fluid is getting in, look up the best way to use it as some air filter systems will block it from getting inside the engine and make you come to the wrong conclusion of which direction to head.
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Old 01-24-2021, 09:05 AM   #3
cheezer8
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Re: 2005 mustang 4.0 wont run

It will run for 3-5 seconds.
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