Still over boost problem

The Devils Own Chariot

The Devils Own Chariot

Active member
I was having problems with overboost or "cut out" when I approach 80-100mph at WOT. The engine cuts out monentarily and the engine light comes on. I have an all stock system except for the new intercooler pump and new intercooler lines. Have replaced all my vaccum hoses and Im not really sure what else to try. I do not have a data master yet. Could it be that little sensor that comes off the wastegate vaccum? What should I try next?
 
Last edited:
QUICK STORM

QUICK STORM

B.A.M.F. BMW Tech
Re: Still over boost problem

this is definately overboost. you need to get better boost control. search "boost control"
because you have no boost gauge or way of telling what the boost is spiking at, possible of spikes hitting 19psi or more, you are going lean. fuel is cut out at 14.7psi of boost with stock chip, and knock will happen. there is alot of reliability mods that SHOULD be done before really messing with boost or putting your foot in it.
 
SY2932

SY2932

Administrator
Re: Still over boost problem

Drop ECM and confirm what chip is in there. Had the same problem when I bought my truck back in '99. Turned out to be a non OEM chip all along...
 
You must log in or register to reply here.
Top