Im having problems with the idle on my 300 as it keeps hunting then stalls, when I disconect the maf its like a new car idles fine.

 

I have tried a know good maf and the car is still the same! I realise it will be in safety mode but this wont matter as i am running the car in.

 

I just want it to be driveable, so I can get it looked at a garage

Think you'll find that with the MAF disconnected, the ECU goes into emergency mode.

This means that it gives the rest of the engine base settings to run on, its a temp measure, and the car will only drive steady. Dont drive it for any distance or you WILL do damage.

Have you tried cleaning the MAF plug??

Or tried fitting another MAF to test it??

Think you'll find that with the MAF disconnected, the ECU goes into emergency mode.

This means that it gives the rest of the engine base settings to run on, its a temp measure, and the car will only drive steady. Dont drive it for any distance or you WILL do damage.

Have you tried cleaning the MAF plug??

Or tried fitting another MAF to test it??

 

Tried another Maf and it was the same + it has a brand new harness so cant be that :(

Got to be something silly, sending a false reading to the ECU, like a temp sensor or something, No-one near you got a conzult they can plug in???

Tried it on the conzult and did not come up with anything apart from the O2's showing a low reading which is weird being as they are new.

 

Its weird that you disconect it and it runs fine, or when its connected partially block it with your fingers and it will idle???

 

seems to me the ecu is thinking there is more air flowing through than actually is so its pumping more fuel in.

If its faulty with it connected, surely it has to be a fault there?

sounds like you may have an air leak

My car idles perfectly well when the MAF is removed as well, however i would certainly not drive it this way. When my car some time ago suffered stalling problems, it was one of the blanks on the re-circs that had popped out, so a major leak, best try one of Vijay's boost leak detectors 1st and then the ECU temp sensor when cruddy can make her run like a bag of sh*te due to over fuelling, but deffo leak tester 1st.

smithy

Going to replace the temp sender as this is one of the things I have not done yet, the car has been leak tested all has come up ok. going to also try another ECU just incase there is a fault there