Full throttle hiccup?

[Tripps]

So in the last 2 weeks, my Carpentered Touring has developed a weird hiccup or burp, only at full throttle, and higher rpms. I can't seem to catch exactly where it is, but it's where it really starts to scream, maybe 5500-6000 rpm. It starts fine, idles fine, runs through all the gears perfectly fine. But at wide open throttle, it bucks, for lack of a better word, and keeps going, it's just a split second, but under that much acceleration you really feel the "kick", then it continues pulling fine. Any ideas, anyone?

 

[TriumPhil]

Possibly loose coil connectors that momentarily lose contact when you get on those cams. If so, they simply require recrimping and a blob of dielectric grease. Could also be something fouling with the intake of air at that speed/throttle setting.

Otherwise, call Bob and ask him what he thinks!

 

[HansO]

how old is your TPS as they can develop a flat spot if you spend a bit of time at that throttle setting I had one do that checked everything else before trying it by putting a new one in after it tested ok but while connected to to my PCV via laptop noticed a flutter in the TPS screen at that point

 

[warp9.9]

Both of the above only check the low tension leads on the coils first as it cost nothing to clean and re-crimp them. Pictured below
green abd brown wires all three coils.

 

[Tripps]

Thanks for the suggestions, I'll try them. I have a new TPS sensor that I bought when I had idle issues, but corrected with TuneECU and adjustment, so I never installed.

 

[Mittzy]

Might be the tyre spinning in the rim!!!!!!!
Just kidding

 

[HansO]

Thanks for the suggestions, I'll try them. I have a new TPS sensor that I bought when I had idle issues, but corrected with TuneECU and adjustment, so I never installed.

I had one on the shelve "just incase" glad I did and will get another next Time I order some parts

 

[Tripps]

Might be the tyre spinning in the rim!!!!!!!
Just kidding

Funny you say that, that is exactly what it feels like, I almost used that in the description, like the tire spun twice and then caught.

 

[Gregger]

When was the last time you checked the splines in your driveshaft to final drive?

 

[Tripps]

When was the last time you checked the splines in your driveshaft to final drive?

Whenever I change the tire. It was fine last time, I would say that no way could that slip and catch again, much less 10 times, I think any failure would be catastrophic.