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I have a 96 LM8 that is throwing a check engine light. The scanner code is P1537 "Idle speed auxillary inputs". Anyone have any input on this?
Posted by: Moes8
ford says that code means.............
P1537 Intake Manifold Runner Control Stuck Open
mike
Posted by: biggjohnson76
Okay, What is an intake manifold runner? and What makes it stick open?
Posted by: Psychostang
Your intake manifold is a dual runner design. The first runner is for below 3,000 rpm operation, and then there is the 2nd runner which is controlled by the IRMC system, for above 3,000 rpm operation. There is a butterfly in each of the 2nd runners, on a common shaft. The computer will open these butterfly valves via the IRMC controllers. Basically its getting a voltage feedback from one of the 2 IRMC controllers, that indicates the valve is open all the time. These valves become gummed up from egr and other sludge deposits over time. It could either be stuck open, or a false reading.
Posted by: biggjohnson76
What can I do about this problem? Is is something that an average mechanic can do?
Posted by: 1996mark8green
the diaghram that controls the intake runner is on each side of the intake at rear of intake one for each side . the have two electrical wires on each (only 96/97/98 have theses i believe i found that one of the diaghams was bad in mine and i am hunting another one thanks dave
