would this have the same effect as disconnecting the positive terminal? I did a tune up on my truck this weekend and was told to reset the computer to disconnect the positive terminal on the battery.

 

I disconnect both terminals when I do any work on my truck. Only once did I have to keep my truck at 3k rpms for the pcm to establish an idle. It did have me worried though.

 

IMO, the negative cable should always be disconnected when doing any type of work that involves electrical components.

Someone else on these forums posted that you should take both the positive and negative cables off and touch them together. Seeing as the battery acts as a voltage regulator, is this a good idea?

 

I think the idea there is to make sure you discharge the capacitors and such in the PCM, so, it really does forget all the previous data. Consider that it is a RIGHT NOW discharge, I am perfectly willing to just wait for a few minutes, as opposed to possibly damaging something expensive.....

 

+1... I wouldn't do that, when you can just turn on the headlights.

 

2006 dodge ram hesitates to go into drive or on to reverse it takes like 2 0r 3 seconds to ingage but does mainly when just starting it up

 

https://dodgeforum.com/forum/2nd-gen...new-topic.html

 

Can someone seriously give a straight answer to question 'PCM relearn procedure' pretty please?? This thread is all over the place, no offence to anyone..it's been the same everywhere I've researched, even my service manual really doesn't mention anything..I read something in it a few weeks back where it said something about 40 cycles did something, but I can't find it...will post it if I do...Thanks!

 

When the pcm is reset, (deprived of power for a few minutes, or, manual reset via the appropriate scan tool) first thing to happen is when you first turn the ignition on, the pcm will re-zero a selection of sensors. (most notably, IAC, and TPS.) Initially, the PCM will run the system a bit rich, until it can collect enough data to start applying fuel trims, to keep things where they need to be (14.7 to 1) For some of the systems, there has to be enough drive cycles, before the PCM considers them "ready", that can be anywhere from just a few, to 20 or more. Varies by system. (and probably by year as well.....) I can't find any hard data on what systems take how long though.... doesn't seem to be out there in the world. Or, I am just using the wrong search terms.

 

No it's just not out there, until we find it Thank you for that info you're such a go mod!! I'm guess what I read I my SM about was referring to "40 Drive cycles" I will find it and I know that's what it said! But I get the exact words and post it for others.