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Fuel Issue


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#1 03CL55AMG

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Posted 25 June 2017 - 09:45 PM

Just curious if anyone has run into what I ran into, so I have after market Injectors.. 950/1800 and I had been running 45 to 46 lbs fuel pressure. For the most part, no issues... But occasionally under light to moderate gas pedal modulation, I would experience dead lean...like there was no fuel at all. If I let off a little on the gas it would come back to life. So , I thought... Bigger injectors probably need a little more fuel pressure. Well the problem got worse with 50 lbs pressure, so I went the other way and backed it down to 42lbs...and that cured the issue, I am not sure why...was thinking maybe the more pressure created void or air in the injectors... Don't know. I thought I would share this, perhaps someone else is experiencing this.
Forged motor, weisco pistons ,3" exhaust, garret 60 cold/ 96 hot turbo, 950/ 1800 injectors , 52mm tb, maft, meth kit.





#2 Preludedude

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Posted 25 June 2017 - 09:57 PM

You running stock ecu?   Maybe a delay before secondary injector kicked in?
Aftermarket inj usually perform around 42-44psi

#3 importwarrior

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Posted 26 June 2017 - 04:48 AM

what are you tuning with? i had similar issues but also am using MAF-T.

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#4 03CL55AMG

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Posted 26 June 2017 - 09:42 PM

Tuning with Maft right now, I am running a stock ECU...it would happen below 3 grand, isn't that when the secondary kicks in. Hopefully pretty soon I will wire up the Gen 2 Maft and some sensors..I will Road test some more soon and see if the issue stays cured.
Forged motor, weisco pistons ,3" exhaust, garret 60 cold/ 96 hot turbo, 950/ 1800 injectors , 52mm tb, maft, meth kit.




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