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i thought that the overspeed and underspeed were really high swings. i noticed with bigger cams +- 3 degrees seems to work better sometimes even less.

tune and log?

do you have a log and your tune

I had a impala do that after I disabled the vats only on the key I did not use when I programmed. If you use your key that you have been using does that light stay off?

I just by off of the dyno today I put a 98 computer in and repined the truck and worked really well

Yes you can do it but what size cam do you have ,50 duration and lobe Sep it might not want to idle that
low

the map sensor graph is only used when the mass airflow has a problem and also to compare against. i think that you could do it in either fashion. you would have to change the airflow maf...

are you going to tune it in speed density mode. if you do you will need a 2 bar map sensor and make the changes to the calibration

pcm?

what is a 0411? i looked at the pinout charts between a 98 to a 96 they are very different.

i have a plow truck that i got off a guy and the trans was blown which was a 4l60e. i had a fresh 4l80e on the shelf i put it in thinking that HP TUNER would have support but i don't think they do. ...

you should be getting 20 mpg stock what are you getting

Ground

i have a 04 duramax that i tuned on my dyno with stock turbo. It has the stock air box with a 5 inch exhaust. i built the trans with 5 disc lockup convter. when i dynoed the truck made 407.3@2896 hp...

i have a guy that is looking to do some work on 2011 2500hd eta?

the truck stops making power at 3000 to 3100 why would you want to go any higher?

how much power do you want. do you tow with it, is it a stock trans

first the tune is safe for your stock trans. second i think the tune could be smoothed a little. what other modifications do you have done to the truck

post your tune i have a 98 riv i have been messing with

okay cool :D

where in NJ are you i am in Philly PA

what rpm was you peak HP and TQ? what CR? you might not want your rpm that high. you have to find what rpm the engine makes it most power and then decide what you want your trans to shift at. what...

what is the throttle position when the knock is heard. is it very light throttle. i can't see 2 degrees being a problem. what fuel and what grade are you using

i did not save the log. i could log it with the MAF and without the MAF and post that if you would like to take a look.

with the MAF i have the issue. without it the car does everything i want it to do