check engine light has been on/off for a week and no cure.

coffinator6 · September 17th, 2007, 09:10 PM

well last monday I had a check engine light for a p1409 EGR vacume regulator circuit fault. the little machine at auto zone said it was a dealer code so i came and looked it up here. LOng story short my vacume lines are good. I replaced my DPFE sensor, egr valve, and my EVR control valve. and it still runs wrong. what do i need to do now? i am lost. the only thing it could be is an electrical connection or a air line behind the engine i cant see.

the car idles really bad and when i let off the gas it lunges consistantly.

anyone have any idea?

Juggalo_X · September 18th, 2007, 03:03 PM

have you checked to see if the egr diaphragm is moving freely? it may not be a problem with the vacume circuit but the diaphragm its self could be jammed

Juggalo_X · September 18th, 2007, 03:04 PM

Originally Posted by Juggalo_X

have you checked to see if the egr diaphragm is moving freely? it may not be a problem with the vacume circuit but the diaphragm its self could be jammed

that could cause the same code

September 17th, 2007, 09:10 PM	#1
coffinator6 Enthusiast 03 GT, 92 coupe 2.3T Join Date: Feb 2007 Location: Choctaw. Oklahoma Posts: 975 iTrader: 3 reviews	check engine light has been on/off for a week and no cure. well last monday I had a check engine light for a p1409 EGR vacume regulator circuit fault. the little machine at auto zone said it was a dealer code so i came and looked it up here. LOng story short my vacume lines are good. I replaced my DPFE sensor, egr valve, and my EVR control valve. and it still runs wrong. what do i need to do now? i am lost. the only thing it could be is an electrical connection or a air line behind the engine i cant see. the car idles really bad and when i let off the gas it lunges consistantly. anyone have any idea?

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September 18th, 2007, 03:03 PM	#2
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	have you checked to see if the egr diaphragm is moving freely? it may not be a problem with the vacume circuit but the diaphragm its self could be jammed

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