i have a 6.0 ls which if you drive easy its ok when you decelerate from above 40mph it will chug and die at complete stop unless you feather throttle at stop alittle then will stay idling but will start right up if dies plz help
i have a 6.0 ls which if you drive easy its ok when you decelerate from above 40mph it will chug and die at complete stop unless you feather throttle at stop alittle then will stay idling but will start right up if dies plz help
As always, tune and log needs to be posted.
FFS how can anyone help without a tune file and data log???? Seriously......
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GM Gen4 Injectors v2.1.xls
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gary 6.0.hpl
its also running very lean to lean to drive dont want to hurt anything i have 52psi fuel pressure which is oem specs any help plz
original tune 6.0_CL_Enabled.hpt
Tune posted sir
Tune and file posted sir
You won't hurt this setup being too lean.
The drivers side o2 sensor looks suspect. The fueling needs to be gone over.
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You have something going on with bank 1. It has the fuel trims pegged at +50%. Need to check the header temps with a temp gun. Might have multiple dead cylinders on that side causing a bunch of raw O2. Bank 2 is not near as bad.
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did some testing found plugs were black and wet replaced plugs checked compression have 180 across the board. have no cylinders missfiring and have 52psi fuel pressure and it still buries my fuel trim to positive 50 is there a chance i can ajust my numbers in ve table in this area to lower my trims or not work that way plz help also have no vacuum leaks any suggestions plz
Every change you make, such as replaced the spark plugs, you need to run a log and post it here for us to see.Originally Posted by [email protected]
Your tune and your data log needs to be posted.
Or else we are like slow-poke rodriguez,nothing gets done.
But yes, altering your VE table, and your MAF, and your timing, and your BRAF and a few others all control how rich it is.
Why are you starting a second thread for the same exact scenario? Stop it. Keep everything in this one thread.
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Where is your current data log after having replaced the plugs????Originally Posted by [email protected]
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new log after changing plugs plz help why so rich
It's not rich, it's lean. It's adding a bunch of fuel via the trims.
Bank 1 in worse than bank 2. Like you have injector oring vacuum leaks on that side or something like that.
It's not running hot enough either. It never even got to 180 in that log. Take the 160 stat out and throw it in the trash and put a 185 in it.
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ok thanks ill replace orings on injectors and put 185 stat in then log again . not sure about this but what if i put more fuel to it and try yes or no or even shut off fuel trims and no close loop operations like it was when i bought the car i went in and turned on fuel trims and made closed loop . i am running a 350turbo trans could this be a factor
What intake manifold is on the car?
The trans has nothing to do with the split fuel trims. They are a result of something being different from one bank to another, vacuum leaks mostly, followed by weak cylinders, manifold design, exhaust leak at the head, etc.
The injectors should fit tightly to the bores in the manifold. If you can slip them in and out easily you have the wrong size o-rings.
Before you make any tuning adjustments you need to do your best to remedy the split fuel trims.
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stock manifold they say it flows the best. im also curious when i bought this car why was trims disabled and had it set for no closed loop once i enabled these problem started im changing everything you said and intake gaskets also thanks and also injectors
Last edited by [email protected]; 04-30-2024 at 02:52 PM.
Stock intake definitely should not have split fuel trims. That means something is mechanically wrong.Originally Posted by [email protected]
No telling why it was tooned in open loop. A lot of idiots do that.
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