well like i said what it was doin in the post prior thats the best i can describe it...if thats not enough well then im sorry thanks for the advise

 

just talked to a mechaninc buddy of mine and he said it sounds like its running lean...cause its choking out...i got 8.1L marines with m10 meth nozzle...?

 

IMO NO f/i system should be mail order tuned..... Too many variables

Get a wideband and a real tune in that thing before you fry that motor and slag your turbo and you have a shiny pile of junk....

 

Mine did the same thing under certain conditions. I don't know if this will help.

I changed to a way cooler burning plug, gapped them at 32, changed the maf sensor, map sensor, and had it dyno tuned. That solved everything.

Good luck. Get it tuned

 

thanks again...yeah i got a cold plug gapped at 35, still running the maf...looking around for a dyno tune shop right now...probably gonna have to go to el paso tx for that...untill i get it fixed ill just car pull to base with a buddy haha

 

I agree. You don't want to mail order tune a turbo. It's hard enough to tune in person. There are way too many things that can cause problems.

Good luck.

 

ok..I'll ask...where did you mount the meth nozzle as opposed to the maf sensor?

 

the meth nozzle is about 12 inches from throttle body....well i called some places about dyno tuning...i think el paso is gonna be about my best shot. my buddys around here took there gto's and stuff out to arizona. but the shop in el paso says $295...that sounds good right...

 

When I first started tuning with meth it would go extremely rich and shutter like your truck. I'm not sure what's going on with your setup but an extreme rich or lean condition will cause the sensation that you are feeling. You need to get that thing tuned on a dyno ASAP.

 

That sounds good, but make sure that shop has tuned trucks like yours with a turbo and they know what they are doing. The only thing worse than fudging your chit up is letting someone else fudge up your chit.

Also, if it is a lean condition you need to get it tuned asap even if you do have to pay a little more.