Stalling

Tiny
ROBERT MARKINS
  • MEMBER
  • 2000 DODGE RAM
  • 5.2L
  • V8
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
Bought this truck tow days ago and it stalled not two blocks from the lot. The fuel indicator dropped to 0 and stayed there when tried to restart it. After a few minutes we tried it again and the fuel needle came up and the truck cranked. Drive it a bit and it stalls again. Took it to the shop and replaced the distributor instead of just the module. Still stalls. Replaced the coil pack and still stalls. Indicator shows "No Bus" on the panel and no codes show up with the OBD tester.
Any ideas would be greatly accepted.
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Saturday, April 29th, 2017 AT 5:17 AM

6 Replies

Tiny
ROBERT MARKINS
  • MEMBER
Checked truck again this morning. Started up fine and ran for a while then shut off. Reset and started again. Shut off second time then mileage indicator blinked four times and went to no bus.
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Saturday, April 29th, 2017 AT 6:55 AM
Tiny
ROBERT MARKINS
  • MEMBER
Just had the ASD relay checked and it is good. Also, read up on troubleshooting the no bus light so will try that after work.
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Saturday, April 29th, 2017 AT 8:14 AM
Tiny
ROBERT MARKINS
  • MEMBER
Started the truck and went for a test drive and the truck shut off again. Pulled a code test and came up with P0720. Looked it up and changed the output speed sensor that was pulled up when we and the parts person looked up the code. Off for another check drive.
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Sunday, April 30th, 2017 AT 12:30 PM
Tiny
CARADIODOC
  • EXPERT
I see no one replied to you yet. There's one thing you need to consider before you get too "wrapped around the axle". The things that shot out to me are "just bought" and "dealer's lot". Those are two comments often related to a vehicle that had the battery disconnected or run dead. The dealer could have installed a new battery, or, thanks to all of the many computers with their memory circuits, Chrysler says a good, fully-charged battery will be strong enough to start the engine after sitting for three weeks. That is now the industry standard. If your truck sat for two or three months, it likely needed a jump-start.

Anything that removes the 12 volts to the Engine Computer will cause it to lose its memory. All of the fuel trim numbers and much of the other learned data will begin to be rebuilt as soon as you start the engine, ... Except for "minimum throttle". Until that is relearned, the engine may not start unless you hold the accelerator pedal down 1/4", you won't get the nice idle flare-up to 1500 rpm at start-up, and it will tend to stall at stop signs. The Engine Computer will not know when it must be in control of idle speed until minimum throttle is relearned.

To meet the conditions for minimum throttle to be relearned, ... (I hope you're up for this!), ... Drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the pedals.

There may be other issues we'll need to consider, but this is one that should be addressed first.
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Monday, May 1st, 2017 AT 3:56 PM
Tiny
ROBERT MARKINS
  • MEMBER
Been trying things on the Dodge to fix it and last night was no different. Pulled the dashboard looking for possible electrical probs and found something that was not normally there unless added. A remote GPS unit and looking it up seen that it had a kill switch function. Took it off and drove the vehicle today with no stalls. So far
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Tuesday, May 2nd, 2017 AT 1:56 PM
Tiny
CARADIODOC
  • EXPERT
Interesting. Don't have a reply of value for that.
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Tuesday, May 2nd, 2017 AT 2:25 PM

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