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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...

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...

new log after changing plugs plz help why so rich

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...

i noticed im getting to much fuel at low speeds can i go to my ve tables and lower the numbers in that area where im to rich to solve this concern or not very new tuner here

Tune and file posted sir

Tune posted sir

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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

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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...

yes i had that problem myself and found out they sold me sensor 2 instead of sensor one and my mv stayed at 450 like yours and would not go into closed loop make sure you have sensors 1 installed...

Can I edit my tune file then save it and write it to pcm later or does it need to be done when I download the tune file

Just the 6.0 engine and factory pcm and have painless wiring harness

Ok thanks will do that and repost this weekend thank you sir

Ok I?ll add on to the obd harness so it reaches inside of vehicle thanks everyone for the advice it helped tremendously

Do I need to change my ect from 285 to something else so I achieve closed loop and also my obd is underhood so it?s hard to test drive and log only can do it at idle is that ok

Can I go into editor and just enable my fuel trims or it needs to be programmed in pcm

Yes fuel pressure is 60 psi also uploaded original tune and it shows long and short term fuel trims disabled and ect set to 285 so never goes into closed loop does this sound right

Just posted the log and file thanks

new tuner here need help with this tune to see whats wrong with this doesnt run well 2003 ls 6.0 ltr with sloppy stage 2 cam and lc9 heads in a 78 trans am plz help


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Don?t know who tuned it the previous owner just said it had a bad ass tune which I think it?s junk I have a log and tune file getting ready to post on the site for help

P59 platform

Bought a 78 trans am with ls 6.0 ltr noticed doesn?t have the power it should. So I bought a mpvi3 and download the file and noticed that my long and short term fuel trims are disabled and my oxygen...

I purchased 2 credits to license my device to car how long are they good for how many times can I scan and tune my car with them thanks again for the advice and help

Okay thank you for your time and advice I will purchase some

Just bought a mpvi3 does this unit come new with credits or I need to purchase thanks