Discussion:
ecm swap

I swapped an ecm between a P5000 and a C5000 and now the P5000 won't start!! Did I do something to the ecm or does it just need reprogrammed?
  • Posted 23 Feb 2010 05:33
  • By dnewfrank
  • joined 22 Dec'09 - 5 messages
  • Pennsylvania, United States
Showing items 1 - 4 of 4 results.
I swapped them and neither would start but yes they are back in the original machines. The C5000 runs but the P5000 wont start and I found out the ECM is not fried because a scanner shows most everything is activating but the injector will not operate. I'll check all the relays. THANKS for your input.
  • Posted 25 Feb 2010 02:04
  • By dnewfrank
  • joined 22 Dec'09 - 5 messages
  • Pennsylvania, United States
anything is possible, but I would not -expect- it to be "fried".
Have you swapped them back?
When you say "identical" how far apart are the serial numbers? are the sensors on the injector housing (carburetor) in the same place?
have you tried moving or replacing the relays in the relay box that is next to the fuse box?
  • Posted 24 Feb 2010 11:24
  • Modified 24 Feb 2010 11:25 by poster
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"
yes I asked myself the same question why did I swap in the first place. But I had identical C5000 i was trying to verify if I had an intermitent ECM problem. Do you think I fryed it?
  • Posted 24 Feb 2010 01:59
  • By dnewfrank
  • joined 22 Dec'09 - 5 messages
  • Pennsylvania, United States
they are not compatible, even if you get it to start, the engine will surge due to differences in transmission ratios.
why did you change it in the first place?
there are even differences between the 2004 and 2005+6 ecms on the same truck size and model.
  • Posted 23 Feb 2010 21:16
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"

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The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.
Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.
Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.