update. fuel psi idle 55 wot 62, different o2's, diff coils, diff wires, new fuel filter,cleaned injectors,new plugs, clean air filter,has a 02 computer, checked all the sensor plugs everything looks like it should work but dose not. i'm about to give up on this thing.

whats turned off in the tune
maf (still using it for IAT), knock sensors, rear o2s.

how it drives.
if i stall it up and let off the break and give it wot it spins the tires very little and stays around 3000rpm, it does not have the ***** to spin the tires past 3000 power breaking it or from a stop. it does not really begin to pull tell around 4500rpm but even then if feels VERY weak, trucks slow and very disappointing. idles wired with the headlights on,has no vac. leaks, all grounds are good and tight.

trying to figure out why it pulls timing.

PLEASE DON'T SAY ITS THE TUNE IVE GOT THAT A MILLION TIMES AND DON'T NEED TO HEAR IT AGAIN. NEED TO KNOW WHO HAS HAD SIMILAR ISSUES AND WHAT SOLVED THEM.

 

Wow, I'm surprised this hasn't been solved yet. I see you have roller rockers listed in your sig. What kind are they, adjustables? Has anybody done a compression test? Also, you keep mentioning that it is pulling timing. How do you know this? I think the basics might be getting overlooked.

 

1.75 comp magnum if i remember right. doing a compression after work some time this week. what basics are you thinking of?

 

I was having similar problem with mine. I checked the cam and sure enough it was off a tooth. So if I were you I would definitely look there.

 

ill start on that this week. it should not take that long to get it all ripped apart!!!

 

If I looked them up correctly, those rockers are mounted on studs, and are adjustable. If they are not adjusted correctly, you will have low or no compression on whichever cylinder. Maybe one, maybe more, who knows. Do a compression test on all 8 cylinders and post up your results.

If the compression test is perfect, next step is to find out if the cam was installed a tooth off.

This, along with checking fuel pressures, etc, is checking the basics. Just about everything else is chasing your tail if the basics aren't right.

 

thank you i will do that tomorrow. and as for the pulling timing i know its pulling timing cause my tuner was watching it on his computer while we were driving doing the last tune.

and thanks for all the answer that are not just ITS YOUR TUNE.

 

its a shot in the dark, but how much torque management got left on?

 

Torque management itself isnt going to hurt the lowend at all, I've got cars and trucks I have tuned out there that will bake off the tires from a stoplight at any given time with only 25%-50% torque management reduction.

 

I'm not sure on the amount of TM taken off.