Well, my friend has a 2000 Xtreme that has a vortech supercharger on it, crane fireball ignition with the ign retard box. It has a problem that we can not figure out. When he bought it it ran perfect, now if you give it about 50% throttle it accelerates fine. If you are just driving and give it 100% percent throttle it just revs up to around 3500-4000rpm and just sits there and doesn't even move. At first we thought it was the transmission, but I do not think that is it. Maybe something with ignition or some type of electronics issue. Any help would be greatly appriciated. Also, if anyone knows somewhere around the dayton/cincinatti ohio area that would be able to tune his truck that would be a greate help also. Thanks everyone, Paul

 

Sounds like spark blowout. Did you pull the gap on the plugs any? If not, that's the first thing that I would try.

 

Have you tried reprogramming that PCM????

 

Well, the wierd thing is it all of a sudden started doing that. He has replaced the plugs 02sensors and wires. Im not sure why it started do it. Also another thing that we noticed was if it is relatively humid outside the truck doesnt like to start. My dads vette did that one day, and all of a sudden it just started. Does anyone know anyone around the dayton cincy ohio area that woudl be capable of tuning this truck or at least giving it a shot to figure out what could be wrong with it. Thanks Paul

 

Anyone have any ideas, should we try unpluging the ignition box, or something like that. Thanks For Your help, Paul