Help!!!!04 RXP runnin like crap

[04searxp]

Hey guys any help would be appreciated. I have a 04 RXP and this year when i put it in the water it started fine but once i hit the gas started running like crap. It feels jerky almost as if the supercharger is kicking in and out. It will only go 45 mph too. i ran it for a while then figuring it was bad gas and it started to run fine just like normal and the same thing is happening again now dont have all the old gas out yet is there any other reason you guys can think of why this is happening

 

[JoeZ]

Could be the supercharger for sure.

Do a seach on here for "supercharger failure" and you'll see it is a very common problem.

Take the intake off of the supercharger and carefully try to rotate the supercharger impeller by hand. If it spins, it's time for a supercharger rebuild.

Have you replaced the washers at this point yet? (If you don't know about the washers, search "supercharger washers" on here as well).

 

[jwalts27]

I agree with JoeZ check that S/C.

 

[Dennis]

I'd try new spark plugs. (3) NGK DCPR8E

DAWG