lleff

Gang -

I've had my 2000 S4 for a few months & I'm having trouble tracking down a weird problem.

First, what I have: GIAC X chip, Borla exhaust, Bailey BPVs.

The problem: The car rips when engine temps are cold/cool. After a few full throttle pulls (engine warms up a bit?), I lose partial power. It feels like a boost leak, but I can't hear anything. The power drops off a bit, but not entirely (feels like a stock S4). Once the boost goes away (?), I don't get it back until the car cools down.

Observation: I shut off the car for a few minutes last night and allowed the throttle to re-adapt. I haven't validated this yet, but it seemed as though I got full boost back again... albeit briefly.

I slapped in the BPVs last weekend & they didn't help.

Thoughts? Theories? Opinions?? Bueller?

Larry Leff
Boston, MA<ul><li><a href="http://www.twofools.com">Two Fools Racing!</a></li></ul>

Ray Khan

I would look at boost vs requested and most importantly MAF readings. If you don't have a VAG tool, ask on www.bostonaudi.org if someone who has one will help you run these logs.

JoeS4

"full throttle rips" before car is warmed up are EVIL

lleff

Gee, thanks for the incredibly helpful advice.