OK guys, I am starting to give up on this car. I have another CEL and it points to vacuum leak on one of the hose. I have changed all the hoses and I am still having the CEL. I have a Y-shaped rubber connector changed today and still have the CEL. Can someone tell me what you have encountered with a vacuum leak. I have a 2001 A4 1.8TQ AWM engine.

 

you realize the CEL won't clear itself until it goes thru at least an entire drive cycle (~200 miles i think). you need a VAG-COM or at least an OBDII reader to clear the code, then retest after each component you replace.

 

I do have a VAGCOM and cleared the fault but it does come back after 100Km. So, I know it is a minute leak and it take that much time to register.

 

iv experience the CEL to come on after everyt ime im over 100 mph

this blows if its meant to be that way

this blows if it needs to be fixed because its not supposed to happen that way

 

What code are you getting?

 

dont got a vagina-com

but it goes away after 200 miles, so im not worried

 

System too lean.

 

Post the actual code.

Could be vacuum leak, MAF, O2 sensor.

 

I know it is a vacuum hose problem. Do you have CEL issue as well?

 

Yah, probably the MAF.