little throttle response

SEL777

SEL777

One of 101
Re: little throttle response

Thanks for the input SM, as I know you guys know these trucks better than most anyone. But the example above reads he was driving it daily but not getting into boost. I can't really drive...unless I stay in my subdivision where the limit is only 20. If the shaft broke would the front side of the turbo still spin freely? Would I have to pull off the turbo to check it out? I still have my old stocker turbo as a spare....and a 67mm that Sean's been itching to get me to throw on.

No one has chimed in on the limp mode question. Hard to tell from the research here but really sounds like whats happening. Most of the suggestions for that was put in a new computer. Thoughts?

What happens when the battery is disconnected when you have code 59? Is the current program lost?

Thanks again to all who've thrown out ideas, that's the support this forum gives. Long live SyTy.net!!
 
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Mingus

Mingus

Member
Re: little throttle response

Disconnecting the battery doesn't affect the code 59 program (at least in my Ty). It does sound like it could be limp mode. You might also check the MAP. Mine would take off strong, then nose over and go lean. It turned out the no-name MAP that was in it had split at the seam. When I was in vacuum, it ran fine, as it got into boost it was separating and loosing boost signal. That made it dial back the fuel, so it went lean and fell on its face. Put in a new MAP and all was well.
 
SEL777

SEL777

One of 101
Re: little throttle response

Thanks again everyone. Sean and I were thinking to double check the map sensor too. I have 2, 3 bar maps on the truck. I can easily switch them to check. I'll keep youz posted.....if I can get to this thread. It's been maddening these last few days.
 
Sportmachines

Sportmachines

Active member
Re: little throttle response

Here to help! Depending on how the turbo broke, and type of blockage, it would cause different symptoms. The front will definatley be free, like scary free, or want slide out. lol. Should be pretty obvious.

I'm with the guys above, with all the info and checks, check the ecm and code59. Ive seen in trucks that sat for a while (for a winter or longer) without ample battery power, we sometimes have to reload the code59 tune as they lose memory or deteriorate for some reason.
 
SEL777

SEL777

One of 101
Re: little throttle response

Update!! Sean and his buddy Rich stopped by today to check fuel pressure, and look things over again, and found when revving the turbo to IC hose was collapsing. He took it off and no hesitation. He put on a new hose and voila' trucks running strong. Many thanks to Sean and Rich for taking time to come over to help me out...while I was working. I have a mysterious coolant leak to find and correct first, but at least I can drive it. I'm looking forward to logging some miles before winter, and even hit the track once a few more DM runs confirm a solid tune.
 
Don W.

Don W.

Stab it and steer it
Re: little throttle response

With all due respect to Sean and Rich "when revving, the turbo to IC hose was collapsing" doesn't make sense. How can the turbo to IC hose collapse under boost? There should virtually NEVER be vac in that hose.

That being said the hose could have failed in such a way as to separate internally creating a "flap" shutting off flow in some manner. That, to me, would be stretching things a bit because as above.

Oh well, if it is fixed then have fun at the track. :tup:
 
Sean Krupa

Sean Krupa

Moderator
Re: little throttle response

The IC to Turbo hose has like a cloth material inside of it that was coming apart. Not sure how to explain it, maybe Steve can take a picture of the hose inside. What was happening was, when reving it, once the Turbo spun the air was blowing the inside of the hose shut, restricting all the air from the Turbo. Weirdest thing I've heard of but that was the issue.

Don, your second theory is 100% correct and exactly what happened. Hard to believe but whatever material that hose is made of come apart inside .
 
Don W.

Don W.

Stab it and steer it
Re: little throttle response

Sean Krupa said:
The IC to Turbo hose has like a cloth material inside of it that was coming apart. Not sure how to explain it, maybe Steve can take a picture of the hose inside. What was happening was, when reving it, once the Turbo spun the air was blowing the inside of the hose shut, restricting all the air from the Turbo. Weirdest thing I've heard of but that was the issue.

Don, your second theory is 100% correct and exactly what happened. Hard to believe but whatever material that hose is made of come apart inside .
Click to expand...

Thank you Sean! That was definitely weird. Glad I covered my but with the last sentence...:rotf:
 
Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: little throttle response

So your truck had an aneurysm. Lol

Nice find! Have you got pics of the offending item so we know what to look for?

Glad you resolved it!
 
SEL777

SEL777

One of 101
Re: little throttle response

Thanks Neil. Just one of those weird things that is now documented for others. Just in case they run into the same thing.
 
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