Turbo 5.3 running rough please help
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Teching In
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Turbo 5.3 running rough please help I was hoping someone could please help me out and give some advice. I just did a 5.3 swap into my 79 Malibu with a s475 turbo. I just got it tuned and it did great on the dyno. Got it home and went for a ride and I blew the maf in half. Changed that and the car was running pretty good. Went for another ride with no issues. Jumped in the car today and it idled great and the first mile was fine. After that it started running very rough. It barely wants to run at part throttle. If I jump on it it still runs rough til about 4000rpm or 5 psi then it seems to wake up and take off. I have about 56psi of fuel pressure. Car was at about 180 degrees. I'm using the stock truck maf, a 2 bar cobalt map sensor, 80 pound injectors and had the car tuned by a shop. If someone could give some advice I'd appreciate it. This is my first efi and my first turbo build so I am at a bit of a loss as where to start. Thank you
Thread Starter
Teching In
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Haven't had a chance to call them yet. I wanted call them as a last resort just so I don't bother them if it's something stupid I've over looked or my fault. And honestly I only stuck with maf because it seemed simpler and really didn't know why I should go 1 way or another. I still have a carb on my daily haha
How did it run when the orig MAF went bad, same as now-it might have killed your 02 sensor-everything is a guess now
if you messed with your throttle screw it could mess things up unless a reset was done
if you messed with your throttle screw it could mess things up unless a reset was done
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