My 2001 F-150 4

DINGER431

MEMBER
2001 FORD F-150
195,000 MILES

My 2001 f150 4.6 had a po402 code for the egr and I have replaced everything except egr valve, idle sucks, it kinda lopes and sometimes dies, gas milelage has not dropped off to bad just need help cannot afford a shop
thank you

Thursday, November 29th, 2012 AT 3:39 PM

6 Replies

DINGER431

MEMBER
4 POSTS

Sorry I posted wrong code its not 402, its po401

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Thursday, November 29th, 2012 AT 3:50 PM

RACEFAN966

MECHANIC
5,029 POSTS

What parts did you replace? Do you have a digital multi meter to do some testing? Have you checked all the vacuum lines and such within the EGR system to make sure none are cracked or burnt? Here is a pic of the components in the egr system.

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Thursday, November 29th, 2012 AT 4:04 PM

DINGER431

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4 POSTS

No meter, installing a tps today, installed egr solenoid, delta pressure sensor, and an iac. Still no improvements. Looked at vacuum lines and do not see any cracks.

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Thursday, November 29th, 2012 AT 5:37 PM

RACEFAN966

MECHANIC
5,029 POSTS

Ok what you need to do now is use the pic included and check the vacuum lines and make sure they are not cracked or pinched. If all is good then you need to start the truck and make sure the vacuum supply is getting vacuum. Do you have a scan tool that can live stream data? What engine do you have?

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Tuesday, December 4th, 2012 AT 2:53 PM

DINGER431

MEMBER
4 POSTS

Thanks for your help, no scan tool. I checked all lines all were good except one on top of throttle body that goes to a solenoid on the firewall. I also read where if you unplug one injector at a time you can trace a coil problem. Also its a 4.6. And thank you again for your help