Hi, I have a car here with a S6 pnp ecu. It happened now 2 times after the car has standed for a while that on key on the IMAP sensor reads a wrong value like 70 kPa with key on engine off. (ambient is 101 kPa). The car starts and the IMAP lives but offcourse it runs rather lean and stalls with the 30% too low value. I opened the ecu one time and checked the pcb but nothing abnormal could be seen. Assembled again then it has been fine for months. Now yesterday the car standed for a bit over a week and the problem was there again. The ecu is in an FC on stock location so I just slapped the footrest plate and bang the reading was correct againt. So it must be a loose connection or bad solder point.

Rather dangerous if this happens under boost id say. I think I will run the map hose to the EMAP sensor and configure it that way in the software. The car is using an external EMAP sensor.

 

Hey mate, I had a problem with both my map sensors, they'd both spike and/or float intermittently by up to 15kpa. Adaptronic fixed it under warranty. Do you see any error on the EMAP sensor or does that read correctly?

 

the car has external EMAP sensor so I wasnt checking the internal one. As of yesterday i connected the hose from map to the EMAP port and use that sensor for IMAP. Lets see how it goes

 

Have you fixed this issue yet, I have the same problem where IMAP reading is way off and stall.

 

imo your best solution is to wire in an external map sensor because it seems like the ones used inside these ecu’s are not dependable.

otherwise I would not be surprised if the internal MAP sensor is bad and needs to be replaced. If you’re unable to calibrate it properly then that’s likely the case.
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Iirc we used the emap sensor then as imap sensor. For emap I used an external sensor from a mercedes om642. These have emap sensor as stock