Hi, My 1997 ford explorer has this problem that when you start the engine it runs fine then it's makes a choking sound in the throttle body area I have a video of it on YouTube here's the link And the truck doesn't give any ob11 codes.

 

Have you don't anything to try to solve this issue, such as remove the intake air tube and inspect the throttle plate? I'd start by making sure the throttle plate is clean, both front and back. I'd also clean the MAF sensor since you don't have just a stock paper air filter. If your air filter is one that uses oil to help trap the dirt, that oil has a tendency to coat the MAF sensor with a film, especially if you've ever cleaned and re-oiled since most of us tend to over-oil the filters.

-Rod

 

Yeah I've changed the o2 sensor cleaned the throttle body but I haven't tried the MAF sensor, I'm going to clean it. Thanks I'll update in a few.

 

I cleaned it and it didn't work.

 

What happens if you unplug the IAC and leave it unplugged. Do you still get the stumble? Does the engine even idle?

-Rod

 

Thats an odd sound, like something in the pulley system as if the A/C compressor trys to kick in and has a bad clutch then kicks out.