Miss at WOT

[patwilliams]

I have a 2001 J40JPLSIA that is missing at WOT. Will start and idle fine but when I give it throttle it starts missing and sometimes die. Rebuilt carbs when symptoms started back in the summer along with a compression test all cyl were fine. I put a timing light on each cyl and see a miss on each cyl at wot. I have used CDI troublshooting guide, Ohms on the coils checked out. I checked resistance on the power pack but the color codes did not match on the CDI troubleshooting guide. DVA out of all powerpacks will go up to 230V but will not go any higher. Shouldnt the voltage keep increasing with the rpm. If so what to do next?

[Rebel Sympathy]

Quick, dangerous, conclusion: Sounds like fuel restriction to me. Ethanol gas eats away at the internals of fuel lines and fuel pump diaphrams. Thus, you may have clogged lines/weak pump. Check it out.....