PMD? codes? resistor? stored values? questions...

[ghost183]

ok.. i have another one for you guys.. your opinions have grown to be more valuable than the local diesel "specialist" shop.. yah right.. lol...

after diagnosing a failing PMD, ive ordered the beefed up Dtech.. should be here right after the weekend..

but..

1) most important, would a bad PMD throw an occassional 251 and 370? and instantanious loss of power, if i shut down, clear the codes.. power is back, no issues, till the next time.. codes popping up randomly, no pattern , but definatly and only when the PMD is hot, even with the engine cold

local guys are telling me yes, but those are the same guys that were lost when i was having the WIF and rattling/loose trans issues, its them that actually threw a rod bearing in my head and killed me back then.. but anyway...

2) upon further inspection, i found the conductive strip that leads to the small chip on the back of the #9 i had in there, broken, the connection seemed to be severed, im not sure if it snapped while removing, but i strongly doubt it.. it didnt even bend when i was taking it out, it actually slid/fell out fairly easy, the locking notch has been ground away, anyway, just for test, i re-installed it and the truck ran the same way so im falling back on that the value is stored, correct? or did it default to 1? anyway

3)that brings up another question.. considering the #9 is questionable, i just popped in a #7 i had, if the #9 is stored, or default #1 for that matter, how do i teach it the 7?

recently, surrounding all the issues i was having, the battery was being disconnected for hours at a time, even overnight on one occassion, to prevent an accidental remote start, if the value stored is the default #1.. it would be prefered to revive it with the correct and current value.. no?

 

[Turbine Doc]

Possibly, generally bad drivers just die, but if resistor is damaged it should set resistor code, in a 99 you could actually run forever with no resistor until you did a TDC learn, then you would get a no start condition and should also get a resistor specific code, since yours is loose however it may be giving a errant tron feed back to the FSD, the PCM will run with the last stored value so a #7 or no resistor will not be of any consequence.

 

[ghost183]

Possibly, generally bad drivers just die, but if resistor is damaged it should set resistor code, in a 99 you could actually run forever with no resistor until you did a TDC learn, then you would get a no start condition and should also get a resistor specific code, since yours is loose however it may be giving a errant tron feed back to the FSD, the PCM will run with the last stored value so a #7 or no resistor will not be of any consequence.

hey TD.. thanks for chiming in..


so? in order to teach it the 7? i have to do a TDC offset learn? is that a procedure i can do? im trying to find info on it but getting alot of googlegobble

 

[Turbine Doc]

Yes but better to let it think it has a 9 as it is a slight bump in fuel, ever done a TDC offset learn ???, you need a bi-directional scanner to see where current setting is, when you do the bump you will see more grunt, and #7 will be recognized by the PCM.

 

[ghost183]

when you say "bump" im assuming you mean the optical bump? im planning on that as well.. so if i do the bump it will see the 7?


edit:

yah.. just read i need a tech1 or tech2, anyone have on by any chance ?

 

[chrisk1500]

Don't do the KOKO procedure without a Tech II to check on IP values....timing the IP blindly is an interesting job....

Ensure your LP is giving adequate pressure.

I can't remember - did you replace your IP after your water in fuel dilemma? If not, I hope your OS is not damaged....

 

[Turbine Doc]

when you say "bump" im assuming you mean the optical bump? im planning on that as well.. so if i do the bump it will see the 7?


edit:

yah.. just read i need a tech1 or tech2, anyone have on by any chance ?

Poor choice of words should not have used bump, TDC offset is a electrical value you need a scan tool to see it with, you may have to move IP to get "in window" 1st find a scan tool and we can try to talk you through a TDC offset.

 

[ghost183]

wow.. ive already started a search for a tech1 or 2, wow.. they are up there arent they?!?! are they the ONLY bi-directional that can be used? a bunch of my friends have the latest (within the last 18 months) matco and snapon units

i didnt change my IP, i opened it up to see for any residue from the WIF issue, and to get anidea on the bump, and its spotless in there so i put everthing back, i have a spare optical sensor just in case, but the IP has under 40k on it.. it was replaced 4 years ago under that special policy exchange..

 

[ghost183]

please tell me the tech units arent the only options here?!??!?!

 

[NVW]

http://www.autoenginuity.com/ and http://www.obd-2.com/#download here are 2 laptop scanners that will work Leo

 

[Turbine Doc]

Also some old "bricks" Snap-on MT2500 on ebay, but IMO AE & OBD2 if you have a laptop is better way to go as they have more functions than MT2500 and can capture/store more data, MT2500 I have is handy for stand alone it's a plug and play quick data grab device.

Gee Ghost 0 answers at other site how fun is that, maybe better you hang out around here

 

[ghost183]

Gee Ghost 0 answers at other site how fun is that, maybe better you hang out around here

yah.. you noticed huh?.... disappointing to say the least, but FWIW, i havent even gone back there since i posted it.. i just threw it there to see what kind of replies i would get.. you know how it is, the more the merrier.. but in all reality, i think that was it..

and what i originally posted stands more true now than before.. about your opinions and advice..

back to the scanner...

my friend has a 2500, if i grab it one day?, how hard is it to do a learn? ive read some regards to it, yours is one of them.. seems straight forward, but im more concerned if something goes bad.. i dont know.. sh*t happens.. itll be my first time going into an ECM like this so im a little shy

thanks TD, too bad this isnt a store front, ide bring coffee in the morning or lunch..

 

[Turbine Doc]

Well taint as hard as made out to be grab the scanner make sure it has correct key and year scan cartridge, MT2500 don't display zactly what T2 does but PM me when ready to have a go at it & I can talk you through it.

 

[chrisk1500]

Or keep the dialogue out in the open instead of PM so that the other OBD II folks can read and learn....just a thought....

 

[ghost183]

Well taint as hard as made out to be grab the scanner make sure it has correct key and year scan cartridge, MT2500 don't display zactly what T2 does but PM me when ready to have a go at it & I can talk you through it.

thanks TD.... any input on my "new" issue? lol.. it never ends.. i tell ya!!!

 

[Turbine Doc]

Or keep the dialogue out in the open instead of PM so that the other OBD II folks can read and learn....just a thought....

It's all in open at other site FAQ, since nobody read it what is point, nah no biggie it had some stuff in it that becomes intuitive once you have done one, that tends to confuse those that haven't done one yet.

Later I'll try to recreate that on a separate thread, just so much info and so little time for me to make it to posting these days. I just suggested PM & phone call as this looks like something he is needing help with before I'll get a chance to post it here.