Please help me figure out my limp mode

[H8GAS]

So I replaced all the vacuum lines yesterday and broke the nipple on the ASV in the process (I'm looking to replace it). Today I pulled the EGR off and cleaned it out and put everything back together. I plugged the vacuum line that goes into the ASV with a golf tee. There is nothing connected to the flap valve that the ASV connects to right now, should it be tied in the open position right now. I buttoned everything back up and went for a drive. Now it is in limp mode. My wife is driving it and told me that the battery light is also flickering on/off. Fortunately she is very close to home in case I have to go get her.

I have not checked it for codes yet since she has the car. I will do that when she gets home. Can somebody point me in the right direction of where to start? Or should I just post the codes on here first?

 

[H8GAS]

VCDS shows no codes.

 

[H8GAS]

I'm open to ideas....

 

[mtbr297]

I would definitely tie open the asv. Are you sure you put all the vacuum lines back on the right connections? I wouldn't think the battery light flickering would be related to your limp mode.

 

[Canadian_Grizzly]

You are on the right track... just go through the writeup in my signature.

 

[H8GAS]

Thanks for the replies! I'm at work, but will get to the car Sunday or Monday and post up any results.

 

[H8GAS]

If 1 doesn't occur, of if 2 fixes the problem; find the vacuum leak. Vacuum is drawn from the rigid line. The line splits twice such that you have 4 unregulated vac lines. One to the N18 (EGR), one to the N75 (turbo), one to the vacuum reservoir and one to the N239 (anti-shudder valve).


This is from your limp mode fix advise.

I had about 28 psi when I did step one, hook up the mity-vac to the "vac" line and start the car. Step two did fix the problem. Does this mean that the problem lies with one of the four unregulated vacuum lines?

 

[H8GAS]

Also, if I run the car with the line connected from the brake booster hard line to the "vac" port on the N75, will the car run similar to as if I had a race pipe installed? IE, run fine with no EGR or ASV function.

 

[H8GAS]

anybody?