[BeauRichardson]

Alright, boosted (11 psi) , cammed, e85, lt4 high side and injectors, fore dual pump on the low side.

Car seems to run fine at idle, but at WOT it starts misfiring like nobody’s business. Breaking up, flashing CEL. The second i mat the pedal and it downshifts is when it starts. at least that what it seems like. might be a little after (like a second at the longest).

I have colder plugs, smaller gap, taylor wires. only thing else i could think of would be tune or ignition coils. i do have the msd 2-step as well.

how do i test coils? what do you think it is? anyone ever dealt with this issue?

Unfortunately that is all i can give you, i’m unable to log and i haven’t gotten an afr gauge yet. The extent of the logging i can do is with a code reader and it tells me how many misfires i have on which cylinder, but the last time i used that was before i even cammed it. It was pretty much ever cylinder but a few that was having misfires, and non of this started until after i replaced my plugs the first time.
My tuners computer has never showed misfires, and i never get codes for a misfire. i have to manually search in the code reader to even see if i’m getting misfires.

[D3adch1ld]

I had a similar issue with the taylor wires on a different platform, they were bleeding spark causing the car to hesitate/buck whenever I went to boost. Start there, then move to new plugs... btw, Amazon sells knockoffs, so I hope you got them from a parts store.

Sent from my SM-N986U1 using Tapatalk

[JANNETTYRACING]

Originally Posted by BeauRichardson

Alright, boosted (11 psi) , cammed, e85, lt4 high side and injectors, fore dual pump on the low side.

Car seems to run fine at idle, but at WOT it starts misfiring like nobody’s business. Breaking up, flashing CEL. The second i mat the pedal and it downshifts is when it starts. at least that what it seems like. might be a little after (like a second at the longest).

I have colder plugs, smaller gap, taylor wires. only thing else i could think of would be tune or ignition coils. i do have the msd 2-step as well.

how do i test coils? what do you think it is? anyone ever dealt with this issue?

Unfortunately that is all i can give you, i’m unable to log and i haven’t gotten an afr gauge yet. The extent of the logging i can do is with a code reader and it tells me how many misfires i have on which cylinder, but the last time i used that was before i even cammed it. It was pretty much ever cylinder but a few that was having misfires, and non of this started until after i replaced my plugs the first time.
My tuners computer has never showed misfires, and i never get codes for a misfire. i have to manually search in the code reader to even see if i’m getting misfires.

Coils are the very last thing that can be wrong, GM coils are ultra strong and reliable.

If I had to guess, it is in the tune part combo.

Log Low side pressure, high side pressure, and injector opening time, and report.

Ted.