stv951

Hello.

I have installed a new Lindsey DPW and MBC some years ago and was extremely happy till recently.
Suddenly the car started rising boost uncontrollably. I visually checked every connection and hose, and all is in place.
I also opened the dpw and it looked fine.
I have only done about 3000 miles since installation (5 years ago)
What could have suddenly gone wrong ?

Keithr726

First remove the lines and search for leaks then test/replace the MBC, they're cheap.

Lindsey units are known for failure as they are pretty much the same part as the factory. Remove it and hook it up to some kind of pump and see what it does. Normally they fail open but you never know.

stv951

i blew on the intake side of the mbc while turning the ****, and i could feel the air flow rising, so i guess that the mbcis ok. how can i test the dpw before i change it ?

stv951

Could it be an ECU failure ?

xsboost90

did you see if the valve was stuck closed on the wastegate?

stv951

It was not stuck...
It opened and closed properly...

xsboost90

ok check this- if you have a Lindsey MBC- is the buttom pushed down all the way. If its not you will get no flow to open the WG.

stv951

please explain what you mean by buttom down? Is it something on the DPW I should check ?

stv951

What do you mean by this ?

zoltan944

I think he means the black **** is pressed in?
But that would not be true as that only locks the **** from turning and nothing else really.

By blowing on the line and feeling it rise doesn't mean your lines are good. Its about how much air. If your baseline air flow is off and it changes as you turn it only means the MBC is functional not that there isn't a hole or misconection

333pg333

Dan's about to get married so I don't think he'll be reading this. Perhaps try the Lindsey forum if it's still up and running?
http://www.turbo944.com/

lejams

The MBC internals are probably toast. Take the MBC apart. If the plastic diaphragm pieces inside look deformed etc., you will need a rebuild kit. LR MBC Kit