Received code reader on Friday. Read code today. I am only getting an enhanced code of P1518 - Intake Manifold Runner Stuck Open Bank1. There were no pending codes. Autozone did not erase code, so don't know why my reader is providing different data. They used an Actron scanner, but it appeared to be a different model.
Erased code, warmed up engine, and drove for 5 miles. Check engine light did not come back on. I will research code further, and monitor for re-occurrance.
Search Info: http://autorepair.about.com/library/faqs/bl660e.htm
The intake manifold has what is called Intake Manifold Runner Control (IMRC).
The air induction system improves engine performance by using the intake manifold runner control (IMRC) assemblies as follows:
The intake manifold has two runners per cylinder, feeding each of the intake parts in the cylinder heads.
The IMRC assemblies are located between the intake manifold and cylinder heads, providing two air passages for each cylinder.
One air passage is always open and the other passage switches from closed to open by means of a valve plate.
Below 3000 rpm , this valve plate is closed to improve low-speed and cold engine performance.
Above 3000 rpm , this valve plate opens to improve high-speed engine performance.
The valve plates are opened and closed by the IMRC deactivation motor, which is controlled by the powertrain control module (PCM)
There is a TSB addressing this DTC and it may or may not be due to a PCM programming error. You should take it to a Ford dealer and let them inspect the system and reprogram the PCM. The TSB is number 02-15-3 dated 08/05/02.
Article No.: 02-15-3
Malfunction indicator lamp (mil) illuminated with diagnostic trouble code (DTC) p1518 intake manifold runner control (IMRC) - vehicles equipped with 3.0 liter 4v engine only.
1996 - 1999 Taurus
MERCURY: 1996 - 1999 Sable
Some vehicles equipped with the 3.0LE 4V Duratec engine may exhibit a Malfunction Indicator Lamp (MIL) illuminated with a Diagnostic Trouble Code (DTC) P1518, Intake Manifold Runner Control (IMRC) stuck open, with no driveability concerns present. This may be caused by the calibration of the Powertrain Control Module (PCM).
If the SES light is out, it means that the condition that turned it on no longer exists but the code will still be stored in the PCM's memory.
Technical Service Bulletin: #8583
I will have to retest and run the rpms above 3K and see if it comes back on, but it sounds like it may just be a reprogram at Ford dealer.
Saturday, December 1st, 2007 AT 12:13 PM