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Ls swap overfueling

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Old Apr 30, 2017 | 06:36 PM
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Default Ls swap overfueling
i have a 6 liter I swapped into a nova. car has brand new 80lb injectors, 3 bar map, stock truck intake with stock regular and rails. 380 pump. The computer was flashed for everything and came off my friends ls swap that runs. Computer has flashed for 80s and a 3 bar. The motor is overfueling itself. it will run only with giving it some throttle. It won't idle or anything. When it does run it's pouring fuel. Does anyone have any ideas? Thank you
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Old Apr 30, 2017 | 06:40 PM
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Fuel pressure regulator?
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Old Apr 30, 2017 | 07:12 PM
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Originally Posted by G Atsma
Fuel pressure regulator?
I tried 2 different ones. They weren't new but I doubt 2 were bad. I guess it's possible tho
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Old Apr 30, 2017 | 07:27 PM
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There might be a reason those regulators aren't being used anymore..... jus' sayin'
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Old Apr 30, 2017 | 07:44 PM
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Originally Posted by G Atsma
There might be a reason those regulators aren't being used anymore..... jus' sayin'
other than that do u have any other idea on what could be happening?
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Old Apr 30, 2017 | 10:38 PM
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Has it done this since "day 1" or just lately? I did notice you have 80# injectors. Have you retuned for them? If not, that IS your problem.
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Old May 1, 2017 | 07:52 AM
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Originally Posted by G Atsma
Has it done this since "day 1" or just lately? I did notice you have 80# injectors. Have you retuned for them? If not, that IS your problem.
the computer is tuned for 80s. It was a junkyard motor. I didn't hear it run but I pulled the original plugs and they were burning fine. So it wasn't running rich at that time.
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Old May 1, 2017 | 09:15 AM
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Have you verified fuel pressure at the rails with a gauge?
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Old May 1, 2017 | 02:38 PM
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When you say... "flashed for 80's" and.... "tuned for 80"s"...what exactly does that mean?

T,
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Old May 1, 2017 | 04:14 PM
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Originally Posted by TomM
When you say... "flashed for 80's" and.... "tuned for 80"s"...what exactly does that mean?

T,
yes tuned for 80s. The computer works on my friends swap no problem. Car runs fine. His build is almost the same as mine
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Old May 1, 2017 | 04:38 PM
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What's the fuel pressure?
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Old May 1, 2017 | 05:29 PM
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Possible that one or more injectors are bad or the Tune still needs to be worked on.

80# is a lot for a stock motor.. What is the Duty cycle of the injectors ?... Is there any leak down why it is sitting ?

keep searching..

BC
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Old May 1, 2017 | 06:22 PM
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Originally Posted by bczee
Possible that one or more injectors are bad or the Tune still needs to be worked on.

80# is a lot for a stock motor.. What is the Duty cycle of the injectors ?... Is there any leak down why it is sitting ?

keep searching..

BC
it's a turbo build and i just put in a 228/230 cam. Idk the duty cycle. Like I said it runs fine on my friends build. Which is also a turbo ls with a small cam
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Old May 1, 2017 | 06:58 PM
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Originally Posted by Mikefliszar
His build is almost the same as mine
So what's different.....?

T,
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Old May 1, 2017 | 07:34 PM
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Originally Posted by TomM
So what's different.....?

T,
it's a 4.8 with ls6 cam
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Old May 1, 2017 | 07:53 PM
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Swap in your friends injectors and see what it does.
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