ok guys heres the deal ....... well im having this rather weird engine stumble .... it usualy only happins when im on the gas hard and its intermittent between 4k and 6 k ..... its almost like the engine is either choking or starving for fuel ... now i have gotten thus far i think its either a vacume leake and my secondarys arnt staying open orrrrrrrrm ... a spark related issue .... i was also told it could be a fuel thing ... now i recently put more fuel in my tank at it has yet to do it ... so do u think it could be my pump?... so many things could be wrong perhaps somone can help me .... ps i know its not my ecu lol ... that was all redone with the engine only 150k km ago

 

The first thing I would do is change plugs and possibly wires. I had a similar problem. I bet your plugs are nasty, and that would be the first thing I'd look at. Even if you changed them recently, flooding would put a bunch of crap on them.

 

check your grounds might have weak connection

 

old dirty fuel filter possibly? check it out.

 

check the ground thats on top of the rotor housing.