it occurs at moderate throttle. a hard, jerky hesitation. it feels like the spark is getting blown out. i thought that is what it was so i gapped my plugs at .030. but it is still happening. any other ideas? btw, no smoke and compression is 190 across the board. lemme know, thanks.

 

Whats your fuel setup?

 

walboro, fmu, 290cc lude injectors, and n/a uberdata (until i get dsm450s).

btw, this didnt happen until i switched from a stock p72 to a uberchipped p28.

 

i have the same exact problem

 

Your not running the FMU with the UBERDATA ecu are you?

If so, Remove the FMU~!!@!@!@~!~!~!~!~!~!