Engine/Transmission (1998.5 - 2002) ECM Failure

[BWillard]

I had the "dead pedal" also! Replaced the VP, Apps, and now I'm running an HO ECM. My problem was at 1800 RPM the truck would just seem to shut down HARD! Put the new VP on... ... same thing, put a loaner APPS on..... same! Put the loaner HO ECM on (which noone said would work) and It's up and running but seems to be clattering louder and a slight stumble on the bottom. So now I'm looking into a MAD ECM or to reflash the HO to a SO or replace the stock one. Decisions, Decisions

 

[DieselMinded]

Mine is the 2001. 5 6spd

Sorry going off your sig



Didnt see the 01 @ the End.



Either Way I guess Im not alone . .



Got MY Comp back today



Comp + New Trany and WOW!!!!!!!!!!!!



Im very happy with it



V 8. 0 EDGE COMP... . NO DRAG



DM

 

[Huff N Puff]

To Dieselminded

Looking at all your troublecodes my suggestion is to look at the voltage reference line, this is usually a 5voltsthat the PCM sends to all its sensors. If that 5volt gets shorted to ground all the sensors that use that 5volt will read low. When trouble shooting a situation like this, I usually look for work that has recently been done that may have pinched the harness. Another possiblility is one of the sensors that is supplied by the 5volt reference could be shorting internally,pulling the 5volts to ground. To find this kind of failure hook a volt meter to the 5volt reference line at the PCM and disconnect the sensors that are supplied by the reference line, one at a time.

 

[DieselMinded]

#ad




UHH ... . OK



?



truck is running on loaner fine Never added anything new when ECM Died



Wheres the " voltage reference line" ?



Thanks



DM

 

[Huff N Puff]

Its really unusuall to have two bad ECMs its more likly to have a wiring problem causing what seems to be an ECM problem. Chaffing wires can be inadvertently moved temporaraly fixing your problem. If it is a chaffed reference wire, and it does find the short again you will have another pile of low sensor codes. You can only trouble shoot a shorted reference line when the short exists. If its running fine now,nothing more can be done. I was giving you these suggestions if you have another failure.

 

[DieselMinded]

Well Im running on A stock ECM now ... but my Apps seems to need reset about once a month ... . anyone expirence this ???



Also When MY ECM died I think it took my 4x4 light with it ... it hasnt worked sence ..... how do I get it back??



Thanks

DM

 

[SnoKing]

DM, maybe if we chained your hood closed and kept the key, you might have less problems!!! Did you use an arc welder on that down pipe without disconnecting your batteries???? SNOKING

 

[DieselMinded]

Yes :<



When I did my strait pipe



It was a Mig Welder And it was about 6 Mths Ago



Welded Down Pipe off truck



And I think your right :>



DM

 

[SnoKing]

Yes :<



When I did my strait pipe



It was a Mig Welder And it was about 6 Mths Ago



Welded Down Pipe off truck



And I think your right :>



DM

About the hood? SNOKING

 

[DieselMinded]

Yes,,,

I would be better off if I never opened the hood.



But its Just too much fun



:>



DM

 

[Gary - K7GLD]

Yes,,,

I would be better off if I never opened the hood.



But its Just too much fun



:>



DM

AW shucks, don't stop playing under yer hood - we all learn from your mistakes - you DO have redeeming value, even if it's only as a horrible example...

 

[Casey Ray]

AW shucks, don't stop playing under yer hood - we all learn from your mistakes - you DO have redeeming value, even if it's only as a horrible example...

PRITJ!



Casey

 

[DieselMinded]

LOL



Thats Me ...



DM