Fell on its face...

[Mopar1973Man]

Got up this morning got hitched up to go get a load of firewood back in the Nezperce Forest. I managed to get heading up the dirt road climbing a fair grade. I'm like 25 miles back in the forest. It was pulling good at 25 to 30 MPH and then all of sudden lost power and fell on its face. Check engine light was set. I did the key trick to see what happened I got P1693 and P1475 (5V bus too high). I turned around and started back down hill. I noticed the throttle was not working correctly like a dead spot. If I left it to coast it would throttle on it own and knock. If a touched the throttle it would throttle normal after the dead spot. I got my phone out and fire up the iQuad app and refused connection. Think maybe the Quad has something to do with it. Ok I just pulled the main connector. I know the MAP sensor is still hooked to the Quad loom. Ok at least it would drive without bucking. 

 

(hour later)

 

I get home with the truck weak on power because of the MAP sensor not hooked up. I grabbed my code reader and here is the new list... P0234, P0236, P0237, P0238, P0253... Now the is no communication errors No P1694 or P1698. But Now I'm having trouble getting the OBDII port to read codes at all. I tried again with Marco on the phone 3 times. No communication. We are starting to think I got bad luck and both the quadzilla and my ECM is bad. Marco was suggesting to barrow a ECM and test again see if the ECM is damaged. I'm not sure about the P0253 code which is VP44 code. 

 

So now I've got to box up my Quadzilla for testing. Pull my ECM and send it to Auto Computer Specialist for testing. Might end up buying a VP44 too... Oh swell... 

[Threadzy]

That sucks! Haven’t you sent the quad out before for repair?  

[Mopar1973Man]

Nope.

 

Actually, I got all codes to clear without the Quad. Back to stock ECM. It runs fine and got the OBDII port working I had a loose pin again...

[Mopar1973Man]

 

After driving back and forth to local friends place it runs fine isn't too bad for smoke does roll some coal clears up pretty quick. Without the boost fooler I falls flat on power as it passes 20 PSI then continues slowly to build all the way to 30 PSI. Still no codes at this point or any weird issues. I'll get the Quadzilla packed up and sent in the mail to Quadzilla Power for testing and repair. 

[Doubletrouble]

 Sounds like you lucked out. May be just the quad the way it's acting. Better than ecm and the vp. At least it was able to make it home, that's always a plus.

[Mopar1973Man]

I can tell you that my trip to Boise ID yesterday sucked... Just running on the stock ECM and no boost fooler wasn't too bad. Spooled quick, it did build a good small cloud but nothing out of hand and cleaned up fast. Hit 20 PSI and from there up its a bit slower to build speed. No EGT's issues even WOT on 7% grade still below 1,200*F just standing on it. Then biggest negative, the MPG dropped hard core. Typically I see 300 to 320 miles at the half mark. Now I'm barely 240 miles at a half tank. Ugh... So I'm using @Wet Vette Hyundai to get around now. I'm just totally waiting on the box to come with the replacement... @Quadzilla Power

[Mopar1973Man]

Ok... Now I feel like a total idiot... I've gotta say "Sorry, to @Quadzilla Power" I got my new module and send back my old module after testing the old module one last time. Needless to say the new unit acted just as weird and goofy. Every time I ease out the clutch the iQuad app would disconnect. Then if I continued to drive the iQuad remains out but now tossed MAP sensor codes. Double check the MAP. Cleared the codes. Check for +12V on the red/white and the red wire. All good. 

 

Check the ground wire... The bolt was ready to fall out... So I'm betting Marco fires up my old module and finds it still functional. After I tighten the ground bolt again ALL problems stopped. Running up that rough road to go firewood cutting shook the truck pretty good so when the bolt backed out of the ground wire the module dropped and fed all kinds of weird message causing the weird throttle and knocking. 

 

So I technically owe @Quadzilla Power for the new module it was my end that failed. 

Edited September 17, 2020 by JAG1

[Mopar1973Man]

Heck that bolt has moved in like 7 years till the last wood cutting trip I shook the truck pretty good as I was climbing the grade and the rough wash board. Dodge mades it but the Cummins shakes it loose... Got to admit runs much better. 

[Quadzilla Power]

@Mopar1973Man Glad you figured it out! At least it was an easy and free fix. We see it all the time where a poor power/ground connection will screw everything up, but a lot of the time it is the last place we look. 

[Mopar1973Man]

5 minutes ago, Quadzilla Power said:

@Mopar1973Man Glad you figured it out! At least it was an easy and free fix. We see it all the time where a poor power/ground connection will screw everything up, but a lot of the time it is the last place we look. 

 

Guilty as charged...  Being I've done so much ground wire changes to the engine already and mindful of weird issues. Just never thought that it would bite me that way and create all kinds of issues. Live and learn. Let me know if I need to settle up or just swap back modules.