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Car cuts out at 20psi.

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dsmsaiyan

10+ Year Contributor
35
1
Jun 23, 2011
dragonballz, Arkansas
Ok, here's the deal i have a bad clutch it slips all the time so it makes me boost higher then what i have it set for. My car will do like a cut out real hard for half a sec then be fine but i always let out when it happens. My car runs great, but here's the thing it doesn't always cut out at 20psi sometimes it will hold it up to 23 or a little more then do a hard gut out for about half a sec then its good. But like i said i always let out when it happens. Can my clutch have anything to do with this?
 
It sounds like possible fuel cut but I'd check your logs. I'd also post one if you can.

As for the over boosting it's possible but I'd also check your wastegate and MBC to make sure they are working properly also. If you don't have at least a Joe P but preferably something a bit "better" like a Hallman.
 
Well i do not have a tune on the car and im running a big 16g.
 
NEED MOAR FUEL!

This just happened to me, I tried turning boost up a tad and it slowed the car down and actually richened my mixture to the point of slow. I turned boost down to 18psi and wahlah,
 
Welp, there you have it. Your stock fuel system is capable of those levels of boost. By far. Turn your boost down. The car is starving for fuel at those boost levels on stock fuel system.

But my air fuel gauge reads that im getting 10.0 amount of fuel all that i can get. This is why i don't understand.
 
Alright, I'll break it down. Just think logically here. You have stock injectors, stock fuel pump, and stock fuel pressure regulator. Your car should not be boosting over 15-16 MAX. So for you to be boosting to 20psi. Is just a no go. You need to get that boost turned down.
 
Alright, I'll break it down. Just think logically here. You have stock injectors, stock fuel pump, and stock fuel pressure regulator. Your car should not be boosting over 15-16 MAX. So for you to be boosting to 20psi. Is just a no go. You need to get that boost turned down.

Alright then thanks will do.
 
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