It locks the converter whenever it wants to.... :/

CSM diesel

CSM diesel

Engineer
Joined
Jun 1, 2007
Messages
479
Ok, I have a lock-up controller that is user selectable as to when the TCC locks up based on VSS signal.

What follows is my day to day argument with the PCM.

So I tell my PCM "Lock the converter at 35mph, cause thats when this little box is going to ground the TCC circuit, not before, not after, but at this speed...... got it?"

So it says "whatev... maybe, ok I'll do it sometimes, but I might find a ground loop to make it lock at a stupid low speed just to piss you off, especially when you are towing and want to be on the converter..... bwwwaaaahahahaha"

FML...

I checked the TPS, it makes 1.0v at idle, 4.9v at WFO. That seems good to go.

When the PCM tricks me and manages to lock the converter before I tell it to, I can give large amounts of throttle input and it will unlock. Like it is grounding that circuit even though I have it interrupted. Ignoring my fun little lock up box.

Its like having a lock up switch, and the converter locks up before you hit the switch.

Should I smash stuff with a hammer?

Should I install a POT in place of the TPS and make it lock up super high, even though the box will ground that circuit?

This truck takes very little throttle input to make it go. Efficient Coupling with excellent gov springs ftw!

:bang
 
I have never been a fan of the lockup controllers myself.

I have a POT on my truck, and it has been flawless. I can adjust it to lock up when i want, and it does it the same every time.

It sounds like your controller either has problems, or you have a short somewhere grounding it out. Make sure your wire doesent have the insulation rubbed off anywhere.

Eric
 
IMHO, you currently have too many variables in the circuit to properly diagnose it. I would start by removing your lockup controller and see what happens. If lockup goes back to normal, then you can likely assume that it is something with your little box. If it does not, then I would consider temporarily rigging up a lockup switch to see if the tranny follows your lockup command or not.

Personally, I think it is your aftermarket box. I feel that most of them are more or less a band aid and don't take over enough of the control of the trans to do their job properly. The one you have sounds better than a lot of them I have heard of people trying however.

I also don't believe that your TPS is in spec, but I don't have the specs in front of me to know for sure. I'll edit this later with the specs when I have more time.

I also don't really care for the POT fix either, but that is primarily because of the traffic flow and the way people drive around here. If the situation was different I think it would work fine.
 
I think I will unplug the controller, leaving the TCC circuit open physically. If it starts locking up I will have to look elsewhere.
 
make sure you complete the circuit when you unplug the box, yellow and blue wire out of the box's harness should be jumped when you remove the box. ;)
 
red96ram said:
make sure you complete the circuit when you unplug the box, yellow and blue wire out of the box's harness should be jumped when you remove the box. ;)
Click to expand...


That would allow the computer to have control of the TCC circuit. Not what I am trying to accomplish.

I am trying to find out if an erratic ground loop is being created in the circuit by something other than the PCM.
 
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