I just got my car back from having two blown heads replaced. Check engine comes on and the code is P1407. It means no flow of EGR I understand. Its a 95 v6. i checked the hoses and electrical connections for voltage. i followed the procedures in my haynes manual and if u have one i did whats on page 6-18 and 6-19. in section 5 i did line 9, 15, 16, and 17. all checked out ok. the 18th line i couldnt quite figure out what they were saying. anyway, i need to know if the lines are hooked up correctly to start with that may be the problem. there is the pipe from the exhaust manifold to the egr valve. the first hose from the botton of that pipe goes to the backside of the DPFE sensor, the side opposite of the electrical connection. the next hose up goes to the front side of the same sensor on the same side as the connection. also from the manifold vacumm port there is a red hose that goes to the bottom port of the EVR, and from the EGR valve there is a green hose that goes to the top port of the EVR. are the hoses in the correct sequence? TIA

Billy

 

DPFE failure s fairly common espescially in the colder months. What usually occurs is the moisture from humidity gets in there, then freezes, damaging the electronics, and bam, you have a bad sensor. Try taking them both of and cleaning the out with brake cleaner, let them dry really good and reinstall them, that will help you figure out which one is bad. They'll work fine for a while, but then eventually clog back up with carbon, that is, if it's not already frozen up and damaged internally.

Ryan

 

just to clarify when u say take them both off, which two do u mean? also i was reading in my manual that when u apply vacuum to the egr valve it should move smoothly without any binding. when i apply the vacuum with my pump it was tough to squeeze up to 5 in-Hg then once past that it shot up to 9 easily. is this normal? TIA

Billy