Car breaking up at WOT.

[gtx3076]

I am running E40, stock heat plugs and whoosh coil packs. I’m going to swap the coil packs back to stock to see if that solves it.

 

[SteveS]

Somehow your thread title made me think of this

Depending on what you mean by breaking up, it could be not enough spark, too much heat, or timing. Or not enough fuel. Or boost leak.

 

[gtx3076]

Somehow your thread title made me think of this

Depending on what you mean by breaking up, it could be not enough spark, too much heat, or timing. Or not enough fuel. Or boost leak.

Diluted E40 back down to around E33. Did a 3rd gear pull, car was hesitating badly under WOT or high boost.

Went home changed whoosh coil packs back to stock. Immediately went out and did a 2nd, 3rd, and 4th gear pull. No problems. Bad coil packs.

 

[gtx3076]

Ron wants me to swap them back in and monitor which coil/cylinder is causing the problem. Probably will wait until this weekend, I want my torque for my daily commute.

 

[gtx3076]

Which parameters should I be observing to see cylinder misfires?

 

[gtx3076]

I swapped the whoosh coils back in as requested. I tried a 3rd gear pull and I could feel the misfires. 101 counts in a single partial pull. I only got to 21psi before I let off. No issues all week on my stock coils.

 

[Clint Beastwood]

what monitor are you using for the misfires?

 

[gtx3076]

what monitor are you using for the misfires?

Misfire count. It doesn’t designate a cylinder so I assume it’s across all cylinders.

 

[Clint Beastwood]

bah i was looking for something starting with "cyl" lol

I like the accessport but its 2023, I sure wish it could show more than 6 monitors at a time and had a better input schema.

Like if you could create profiles from your computer or phone and then just switch profiles on the AP, that would be sweet.

 

[gtx3076]

And for anyone wondering, after I swapped back in the stock coils (again same stock heat NGK spark plugs), I monitored the same parameters, immediately did another 3rd gear pull and I hit 25psi and not a single knock count in any cylinder, and zero misfires.

 

[DEss]

And for anyone wondering, after I swapped back in the stock coils (again same stock heat NGK spark plugs), I monitored the same parameters, immediately did another 3rd gear pull and I hit 25psi and not a single knock count in any cylinder, and zero misfires.

What made you decide to change out the OEM ignition coils to begin with - age?

DEss

 

[gtx3076]

What made you decide to change out the OEM ignition coils to begin with - age?

DEss

Yes, I have 148,000 miles on the car and I had a rough idle and hard starting during the winter with the step colder plugs because they were fouling. Changed back to stock heat plugs and figured I getting new coils wouldn’t hurt.

 

[XR650R]

Somehow your thread title made me think of this

Depending on what you mean by breaking up, it could be not enough spark, too much heat, or timing. Or not enough fuel. Or boost leak.

She's breaking up! She's breaking up!

View: https://www.youtube.com/watch?v=0CPJ-AbCsT8