pop through tbi
#1
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Car: 1991 camaro rs convertible
Engine: Built ls1
Transmission: T56
Axle/Gears: 3:42
pop through tbi
Ok, new issue since putting in zz4 cam. i am thinking that it is a lean pop through the tbi but im not sure and wanted to get some opinions. I have 350 injectors and a ported throttle body with a tpi fuel pump. right now my fuel pressure is at 14 psi. if i snap the throttle open it occasionally pops through the tbi with flames. i have not done prom tuning yet and realize i need to do it, but in the meantime can i get the car to run without the flames at wot without tuning? could it be a rich condition?
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Car: check
Engine: check
Transmission: check
Re: pop through tbi
Ok, new issue since putting in zz4 cam. i am thinking that it is a lean pop through the tbi but im not sure and wanted to get some opinions. I have 350 injectors and a ported throttle body with a tpi fuel pump. right now my fuel pressure is at 14 psi. if i snap the throttle open it occasionally pops through the tbi with flames. i have not done prom tuning yet and realize i need to do it, but in the meantime can i get the car to run without the flames at wot without tuning? could it be a rich condition?
You can try advancing the distributor 2 - 4 degrees. There is a good possibility that will help. Once you start tuning be sure to set the ECM calibration's Initial SA to what the distributor base setting is.
RBob.
#3
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Car: 1991 camaro rs convertible
Engine: Built ls1
Transmission: T56
Axle/Gears: 3:42
Re: pop through tbi
Thanx RBob, i advanced timing a few degrees and it seemed to behave muchbetter, no popping. I decided to play around with the fuel pressure to see what would happen and when i dropped it down to the 11-12 psi it stumbled and popped through the tbi as it did before , so i put it back up to 15 psi and it was 100 times better no pop or anything. The biggest issue i have now is its running rich, which needs to be corrected through tuning.
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