Why does my truck turn off at every stop?

80

Asked by Jul 07, 2015 at 04:57 PM about the 2003 Ford F-150

Question type: Maintenance & Repair

Hello... so my truck started dying on
me. If I have to wait at a red light, it
shakes and turns off. There's no
problem turning it back on, and stays
on as long as I'm moving - but the
minute I stop, it'll turn back off.
I already cleaned the air filter with
K&N, reinstalled it, and tested it.
Although now it won't turn off, it still
shakes and acts like its going to turn
off. Any suggestions of what else I
can check would be greatly
appreciated!
I'm at the 135,000 mark. It's a 4.6L
engine. 2003 Ford F150 Super Crew.
Thanks!

7 Answers

275,445

Clean the throttle body and IAC. Did you check your spark plugs yet, they should have been changed at 100K. CEL on?

Best Answer Mark helpful
80

Yes, spark plugs changed a year ago. I'll check the other stuff... Thanks!

22,100

Throttle body and IAC probably filthy. Tom gave the correct advice as to cleaning. DO NOT use carb cleaner, They make cleaner for throttle bodies which will not damage the coating on the parts.

What is IAC ?

Did u ever get the find what was wrong with ur truck. Im having same issue

80

Yes I did! All my mechanic did was adjust the accelerator pump! Easy fix.

80

I also googled "How to cure carburetor stumble."

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