Quote:
|
Originally Posted by veg_burner
I cleaned the banjo bolt fitting on the back of the intake manifold to the boost bleed valve. 10 lbs. of boost in the line. Hooked up the pressure gauge to the line going to the ALDA from the bleed valve, 0 psi, found I had a bad valve. Before I went and found myself a new valve I bypassed it and plugged straight into the ALDA, I figured I'd get my boost now but no change in performance. (Though I *did* check my 0-60 and it's at 16 secs.)
|
You can stop right there as far as condemning the ALDA. You
must determine why you have no boost prior to adressing issues with the ALDA. Even if the ALDA is non-functional, the engine should develop about 5 psi of boost if everything else is working properly.
Quote:
|
Originally Posted by veg_burner
Scoured the archives again and found posts suggesting my ALDA may be bad and how to check it: pump it up to 15 lbs and see if it holds. I tested four that I found at wrecking yards and they all were no good.
|
When you "pumped it up to 15 lbs.", explain how you did this. The ALDA requires pressure. You can't do it with vacuum.
Quote:
|
Originally Posted by veg_burner
Stopped by a repair shop/dismantler asking for one and the guy wanted to know what I thought was wrong. He claimed that the ALDA had no function except at altitude. From what I had come to understand through all the ALDA posts I've read is the ALDA enriches the fuel according to the boost. (Also we all know adjusting it can take out the turbo lag...)
|
You are correct. The guy has his head up his a$$.
Quote:
|
Originally Posted by veg_burner
He also looked under my hood and noticed the EGR lines were disconnected (haven't got around to installing the block off plate yet) and he told me it could be causing performance issues (!) He also said "You see that SD over there, we just got done re-sleeving the block and replacing two pistons. The owner of the car didn't want to spend the money replacing a faulty EGR valve so he stopped up the line with a BB. Within 6 months the engine melted. The EGR valve sends cooler (than compression chamber?) exhaust gases across the valves to help cool them down a little. If you sent fresh cold air the valves would warp."
|
Total and complete BS. The EGR will lower the exhaust temperature slightly, but, it is normally shut down for maximum performance at full power, so, EGR could never be the culprit for melting pistons.
Quote:
|
Originally Posted by veg_burner
Shows you how little even Mercedes mechanics know! He *did* go out of his way to try & help me
|
The mechanic is a moron. I would avoid this mechanic at all costs.