Board index i2/i3 Technical discussion i2/i3 for Ford vehicles Throttle jerking on F150? No power at high rpm - SOLVED!

Throttle jerking on F150? No power at high rpm - SOLVED!

Post here with any questions you have regarding theuse of the i2 on supported Ford applications.

Moderator: sohfast94


Posts: 10
I have this problem with all of the tunes. Right now I'm using the MPG boost tune. Between 4500rpm and 5000rpm the power fades and feels like it's surging. I've had this problem for a while, happens under load almost every time from 2nd gear to third.

This does not happen with the stock tune.

The log shows the throttle angle bouncing around...not sure why. Shouldn't it be smooth?

I will post a log.

Thank you.


UPDATE!!

So I have an update. My engine started misfiring on cylinder 1 on stock tune. I diagnosed it as a fuel injector because it wasn't the spark plug or the ignition coil.

It was lumpy at idle. Engine running with a mild shake. Not nice but smooth while driving. When flooring it with the stock tune it started mimicking my problem i had with the Diablosport tunes. around 5000+ rpm it start bucking and the RPM needle would randomly loose RPM's for a split second. Lose of power.

I Seafoamed the upper intake manifold 2 times and noticed a small improvement in my idle, but still misfiring. I used a lot of injector cleaner in my tank but it was not helping unclog the injector.

I did some research and bought one of these:(but the cheaper one on Amazon)

https://www.otctools.com/products/fuel- ... ning-kit-0

I hooked it up and ran 2 cans of Royal Purple Max-Clean Fuel System Cleaner & Stabilizer through it.

right away i noticed the change. No more misfiring AND the truck is running incredibly smooth. I've owned the truck for the last 18,000 miles and it's like i have a new engine.

I flashed the 91 octane tune and topped up my engine (already running 91) and the problem is GONE.

No power loss, smooth raw power now. I can't believe it.

I hope this helps.
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Last edited by sethrocon on Sat Sep 28, 2019 9:08 pm, edited 1 time in total.


Posts: 55453
Location: DiabloSport World Headquarters

what year and engine in this truck?
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST


Posts: 10
2012 Ford F150 3.5L Ecoboost


Posts: 55453
Location: DiabloSport World Headquarters

please post a copy of the info.xml file as well as the last tune written from the tunes folder so we can look into this.
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST


Posts: 10
Just wanted to tell let everyone know that I've had some luck. I edited the post.


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