Stumble/Miss/Hesitation

[LongIslandSCREW]

Hex is in - all updates done - guess I didnt realize I had it set up already - no change in status from above messages.

[Ideal150]

Hey yall just wanted to see the outcome of this. I had heard about it before on other posts and have been experiencing the same issue with mine when im on 91 perf. I dont get it in stock or 87 perf. 06 fx4 5.4, 70xxx thanks in advance for the help!

[88Racing]

Originally Posted by LongIslandSCREW

Hex is in - all updates done - guess I didnt realize I had it set up already - no change in status from above messages.

Your hex is supposed to go here also.
http://forum.gopowerhungry.com/membe...landscrew.html

[88Racing]

Originally Posted by Ideal150

Hey yall just wanted to see the outcome of this. I had heard about it before on other posts and have been experiencing the same issue with mine when im on 91 perf. I dont get it in stock or 87 perf. 06 fx4 5.4, 70xxx thanks in advance for the help!

Good job!
I see your user cp is up to date!
http://forum.gopowerhungry.com/members/ideal150.html

[Ideal150]

Originally Posted by 88Racing

Good job!
I see your user cp is up to date!
http://forum.gopowerhungry.com/members/ideal150.html

Yes sir! Any update or idea on what could be the issue?

[LongIslandSCREW]

Hey All, this is still an issue for me. Ive run a couple tanks of gas (93 octane of course) at various speeds and drive times and its still pretty bad - I figured it would eventually work it out - Wednesday morning while stuck in traffic on the long island expressway the sputtering actually had my truck bucking while i was just touching the gas, it felt almost as if my truck was a stick and i wasnt giving it enough gas. I am also noticing that from a rolling start (under 25 mph) the sputtering occurs on light acceleration up to almost 2200 RPMS. I cant drive my truck stock anymore so if anyone knows what the problem could be please keep me posted!

Thanks so much!

Side note: My buddy suggested that it could be the transmission settings on the canned tune - he said something like maybe its too much pump pressure at a low idle? Does that make sense to anyone?

[88Racing]

LongIslandSCREW,
I'll post a note on the moderators board for Bill to look at this.
Thanx for completely the info in your user cp. I and PHP appreciate it.
Peace!

[Power Hungry]

Pete,

I have an updated file for you to download. There is a small change to the Open Loop transition that should help eliminate any tip-in stumble.

Mark,

I will have to take a closer look at the canned tunes for you calibration and see what I can come up on that. I am going to assume that the symptoms and cause are similarly caused by an Open Loop transition problem.

I don't think these issues are caused by line pressure problems because we add little, if any, pressure at light throttle and all pressures are progressively controlled by throttle position and load. The more throttle and load, the more pressure is applied to the clutches.

Keep me posted.

[LongIslandSCREW]

Thanks 88 and thanks Bill - I appreciate it! I cant go back to stock HA HA HA HA HA !!!

Bill, I am home most of the time - work out of my house. If you have seen this issue enough and would like (and its possible) I could always hook my laptop up to the programmer and take a drive while you watch and try to diagnose. I have a verizon wireless card in my laptop so mobile isnt an issue.

Rarely do i opt to drive slow so its an issue but its really not. Problem is where I live - there is always traffic!!!!

[tohi2care]

I have been experiencing the shuddering aswell. It feels like the truck is misfiring and if I turn the engine off and restart it the problem goes away. I'm going to plug my gryphon into pegasus tonight since it's been awhile and see if there are any updates.