I would appreciate some expert help on my problem...

I have already taken the MAF out and cleaned with MAF spray cleaner. No stored codes. Car just won't accelerate under full throttle. Light throttle and car accelerates briskly up to about to 3,500RPM...but then starts to buck resisting going to red line. Any suggestions on what to check or replace?

Replace MAF?

Is there a recall on the ETM for 2001 models?

Are you supposed to hear the turbo spool up on these cars?

Automatic with about 115k on the odometer.

 

I think I tried mine ('09 model) once when it's brand new and it did the same thing. So I believe it's a design feature on the car: when it's parked, it doesn't allow you to rev up the RPM higher than 3000. There may be some way to bypass this but I don't know how.

On the other hand, on older model cars such as my '94 Bronco, they don't have this feature. So when my Bronco couldn't exceed 3000 RPM, I found it's the catalytic converter which was clogged to choke the engine.

Try to drive it with low gear and see if RPM can go up...

 

Thanks for your reply...

It's when I'm driving the vehicle that it was stumbling at high RPM.
The motor rev's fine to the 4,000 limit when out of gear.

I did find a split in the rubber interconnect hose between the turbo and the intercooler pipe at the turbo down behind the motor. I replaced that hose, but it still resists to rev to red line smoothly.

Replacing the hose improved off idle performance and better mid range acceleration due to higher boost in that range.

 

How old are the COPs? When was the fuel filter changed? What is the fuel pressure @ the engine? When was the air cleaner changed?