Changed fuel pump and it ran for 2 minutes

WYLIE61

MEMBER
FORD MUSTANG

I have a 2003 Mustang GT 4.6l V8. One day out of the blue it just wouldnt start so I changed the fuel pump on a hunch. Once I changed the pump the car started and ran for about 2 min while blowing white smoke everywhere and running very rough. After 2 minutes it shut off and now wont start again. I didnt fill the new pump with fuel so not sure if there is air in the line possibly and how to get it out. Any ideas what may be wrong?

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

When you turn key to On, Do you hear the fuel pump buzzing/humming for 2secs?

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Thursday, November 1st, 2007 AT 3:46 AM

WYLIE61

MEMBER
3 POSTS

You can hear the fuel pump if u crawl under the car and listen but in those cars they are very hard to hear. When I went to start it this morning it cranked well but seemed to be struggling thats why I was wondering if air lock is a possibilty

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Thursday, November 1st, 2007 AT 10:06 AM

RASMATAZ

MECHANIC
75,992 POSTS

You need to hook-up a fuel pressure gauge to check if it has the correct fuel pressure.

Do this crank engine over while listening to the fuel injector/s is it clicking? If not, you're not getting fuel. Could be the computer is missing the crank signal and not energizing the injector/s.

Also do this-disconnect a sparkplug wire from the plug and ground it to the engine while cranking engine over-Do you have spark.

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Thursday, November 1st, 2007 AT 12:45 PM