2011 m56x having some idling issues

[ackinup]

Recently been having some idling issues. They are causing misfires diagnostic states. Also vehicle didn't stay on after 2 attempts. To start, light tap on the accelerator to stay on. Anyone with my info would appreciate it.

[Ilya]

Any additional codes or just the misfire codes?

MAF? MAP?

[TomL5]

I had the same issues where the car did not stay on unless I gave it a bit of gas (from a cold start).

I ended up cleaning the air intake valves and it cleared it right up. My car is also a 2011 M56x and when I cleaned the valves at 76k miles, they were very dirty with carbon build up.

[Ilya]

I had the same issues where the car did not stay on unless I gave it a bit of gas (from a cold start).

I ended up cleaning the air intake valves and it cleared it right up. My car is also a 2011 M56x and when I cleaned the valves at 76k miles, they were very dirty with carbon build up.

You referring to the throttle body butterflies?

[TomL5]

Yes, the throttle body butterfly valves! Sorry if I used the wrong term

At first when I was having this problem,I was going down the path of looking at the MAP sensor. I thought what the heck, give the cleaning a try, and it seems to have solved my issue.

[Ilya]

OP, if you clean the valves you might have to do the relearn procedures for the idle, etc. Search the forum for them. It's not a bad idea, in your situation, to investigate that though.

[armybrat]

Yes, the throttle body butterfly valves! Sorry if I used the wrong term

At first when I was having this problem,I was going down the path of looking at the MAP sensor. I thought what the heck, give the cleaning a try, and it seems to have solved my issue.

You might have a look at this thread:
intake-valve-and-port-pictures-t612859.html

[TomL5]

You might have a look at this thread:
intake-valve-and-port-pictures-t612859.html

Holy cow, that's what the valves look like at ~92k miles?

I don't have access to a media blaster, but I may give it a go with the carb cleaner and the toothbrush.

[DFW2011M56S]

You might have a look at this thread:
intake-valve-and-port-pictures-t612859.html

Holy cow, that's what the valves look like at ~92k miles?

I don't have access to a media blaster, but I may give it a go with the carb cleaner and the toothbrush.

That was my car after using two different chemical cleaners in the previous few months. They did a little on the rear 4 ports but gummed up the valves. 92K miles. The throttle plates were nearly spotless compared to the valves themself.