Hesitation on startup

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,215

17,899

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Massachusetts

Jul 20, 2006

#1

• Jul 20, 2006

• #1

I've often heard a lot of guys having this problem with their 99+'s

Once in a blue while my car will hesitate upon startup. It only does it when hot and it will just take a few extra seconds of cranking to start the engine and when it does it will stumble for a second and then run fine. Only does it once in a rare while.

Friend of mine has it happen to her car all the time. I've also read about guys having the same issues before.

So what's the fix if there is one??

 

03ghoststang

Well-Known Member

Jul 16, 2005

1,930

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Los Angeles, California

Jul 20, 2006

#2

• Jul 20, 2006

• #2

thats a good question that i have no answer too there has been threads on this and people will say its the IAT sensor others say something else which i cant remember...........my car does it too specially know that it is hot in but not in cold weather

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,215

17,899

224

Massachusetts

Jul 21, 2006

#3

• Jul 21, 2006

• #3

Yeah i remember past threads it was discussed. I can't seem to find the right word combo to find it in a search. I know a lot of guys said it was the IAT just like to bring this up again if some guys have fixed it.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Jul 21, 2006

#4

• Jul 21, 2006

• #4

I believe there is a TSB for the problem with difficulty starting when hot it is a known issue with no fix I think. I think I remember that if you leave the key in run for a sec to pressurize the fuel system before you turn it over it will minimize the problem.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Jul 21, 2006

#5

• Jul 21, 2006

• #5

Oh, and I think (not sure) someone might have said a firmware upgrade helps also.

 

03ghoststang

Well-Known Member

Jul 16, 2005

1,930

1

57

Los Angeles, California

Jul 21, 2006

#6

• Jul 21, 2006

• #6

Kilgore Trout said:

I believe there is a TSB for the problem with difficulty starting when hot it is a known issue with no fix I think. I think I remember that if you leave the key in run for a sec to pressurize the fuel system before you turn it over it will minimize the problem.

Click to expand...

i read something like that too but thats sucks that there is no fix