sputter / miss at take off

[cheetahearl]

I have a 454 Mag MPI that just started to sputter / miss / cr#p out under hard acceleration, like when pulling a skier. Once moving the motor runs fine, pulls close to redline with not a trace of the problem.
Replaced fuel filter with no success, is this a job for a scan tool diagnosis, or would I get lucky with plugs, wires ??
Thanks for any pointers or experience that can be shared.

[wan hung lo]

The new fuel mix really sucks. It can't take any moisture at all. It also is more prone to shelacking. Maybe try a good fuel additive? Hope you find it soon. The season is short enough as it is!!

[DMOORE]

Might be worth a look at the plugs also. Won't cost to look.
Darrell.

[cheetahearl]

Thanks for the note..any suggestions on a good fuel additive?
The new fuel mix really sucks. It can't take any moisture at all. It also is more prone to shelacking. Maybe try a good fuel additive? Hope you find it soon. The season is short enough as it is!!

[Taylorman]

I was gonna post the same question today. Mine did the same thing saturday. Never has done that before.

[wan hung lo]

K100, you want the marine additive. Here is the website. They have a great description of how bad this ethanol mix is for small engines and boats. Especially fiberglass tanks.
www.k100fueltreatment.com

[cheetahearl]

Might be worth a look at the plugs also. Won't cost to look.
Darrell.
Thanks Darrell...good call (the price is right)