[RESOLVED] Explanation of how a BOOST leak can cause FUEL cut? Please.

[SnowBird]

I keep hitting fuel cut out of nowhere around 14lbs, when I usually can run 15lbs all day long all day strong with no problems. I havent checked it yet, but I heard a boost leak can cause this "cut" and I didnt see how if the air leaks/enters after the MAS. I just dont understand how it happens.

Im a true NEWB still, I still get off on stage 0 mods and stock fuel trims

 

[My1GLaser]

A boost leak causes the turbo to work harder to maintain the same intake tract pressure. While working harder it draws in more air thru the MAS and the ECU sees this excess air and cuts fuel. You don't see more boost at your gauge because it is leaking out somewhere, but your airflow is higher nonetheless.

 

[MrBoxx]

http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/186971-what-fuel-cut.html

That was found in the Frequently Answered Questions forum. Using the Search function. My1GLaser's answer pretty much sums it up, though.

 

[untouchablecc]

Just go over all of your piping. If you can do a boost leak test that would be great an spraying soapy water over your couplers helps to see air bubbles. If its not any of the connections or piping do not forget to check the fuel injector seals an throttle body gaskets. Also could be a vacuum line came off.

 

[SnowBird]

http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/186971-what-fuel-cut.html

That was found in the Frequently Answered Questions forum. Using the Search function. My1GLaser's answer pretty much sums it up, though.

DOH! Thanks, I searched for "fuel cut" but couldnt find an explanation of how it happens. I know I have a leak somewhere, my idle keeps going up a little daily. I gues a boost leak doesnt measure on a boost gauge at all though?

 

[95redturboawd]

No, it wouldn't. Only if you're doing a boost leak test, then you can tell if you have a leak by looking at the gauge.