code p1518
Thread Starter
|
Junior Member
Joined: Mar 2001
Posts: 2
Likes: 0
From: SIMPSONVILLE, S.C.
code p1518
I had Autozone run the scanner on my 1999 4.2L F-150 today and the code read p1518. (imrc stuck open). I searched the archives and couldn't get a definitive answer. Does this year F-150 have vacuum lines to contro the butterfly valves or is it an electrical unit?? I crawled up in the engine bay and tried to feel around and couldn't feel any. HELP!!
thanks in advance
JEFF
thanks in advance
JEFF
Member
Joined: Dec 2002
Posts: 88
Likes: 0
From: Kissimmee, Fl
i got the same code on my 97.
The IMRC is a fail open valve(opens in the rest position).
The way the system works(atleast on my 97) is vacuum goes to a solenoid that is attached on the intake plenum, then leaves that solenoid to the IMRC. The module, which is at the back of the intake hasa vacuum diaphragm and a position switch.
What I first did was disconnect the vacuum lines from the solenoid. I pulleda vacuum(sucked) on the lines that go to the IMRC. Once I pulled a vacuum I let go, and heard both actuators hit their travel stops(meaning that if they got vacuum, they would work). Next, I started the engine and noticed that the vacuum signal to the solenoid was non existant at idle, which is when the valves should be closed in the first place.
Found the line to have a pinhole in it between the battery and the solenoid.
Just use some logic and you will solve your problem quick.
The IMRC is a fail open valve(opens in the rest position).
The way the system works(atleast on my 97) is vacuum goes to a solenoid that is attached on the intake plenum, then leaves that solenoid to the IMRC. The module, which is at the back of the intake hasa vacuum diaphragm and a position switch.
What I first did was disconnect the vacuum lines from the solenoid. I pulleda vacuum(sucked) on the lines that go to the IMRC. Once I pulled a vacuum I let go, and heard both actuators hit their travel stops(meaning that if they got vacuum, they would work). Next, I started the engine and noticed that the vacuum signal to the solenoid was non existant at idle, which is when the valves should be closed in the first place.
Found the line to have a pinhole in it between the battery and the solenoid.
Just use some logic and you will solve your problem quick.
Senior Member
Joined: Mar 2003
Posts: 102
Likes: 0
From: Somewhere in Wisconsin(for now)
I hereby grant you membership in the high mileage club.
IMRC - intake manifold runner control.
The air handler side of the fuel injection system. You'll notice it needs to be fixed pretty soon as the engine starts running rough after about 600-700 miles. I had mine replaced at 121,000.
First of all you need to understand that the part is designed to last 100,000-150,000 miles. If you are in that range, the part has served its life and simply needs to be replaced.
The bad part..... I paid $250 for the part alone and another $450 to install it. This part is buried deep inside that beautiful V-6.
The bottom line is that you're not going to keep running much longer without fixing this one.
IMRC - intake manifold runner control.
The air handler side of the fuel injection system. You'll notice it needs to be fixed pretty soon as the engine starts running rough after about 600-700 miles. I had mine replaced at 121,000.
First of all you need to understand that the part is designed to last 100,000-150,000 miles. If you are in that range, the part has served its life and simply needs to be replaced.
The bad part..... I paid $250 for the part alone and another $450 to install it. This part is buried deep inside that beautiful V-6.
The bottom line is that you're not going to keep running much longer without fixing this one.