Po206 and po208 issue after 3.9 to 5.9 swap
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Po206 and po208 issue after 3.9 to 5.9 swap
Hi all new to the forum here i did a 3.9 to 5.9 swap on a 2003 dakota truck starts and runs but got codes for po206 and po208 I add in the injectors to the v6 harness I’m pretty sure all the wiring is good any advice greatly appreciated thanks
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It runs rough dies within 30 seconds haven’t drove it since the swap motor came out a 94 ram egr has been removed I had to add injectors 7 and 8 to the harness I’m sure the wiring is right so yea it feels like a misfire no codes for misfires though
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From: Fort Worth, TX
Is the PCM out of the 94 or a 97-02 5.2/5.9 truck? That could cause a few issues. Different electronics in 94, need to use a 97-02 PCM off a 5.2 or 5.9 truck. The 5.2 will re-calibrate to the 5.9 within reason.
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I got a pcm from a 2003 ram 5.9 in it. it runs the truck and everything works except those two codes I also have a pcm from a 98 5.2 dakota it had the no bus on the odometer and gauges wouldn’t work both pcms gave me the same codes for 6 and 8 injectors so I would think it’s safe to rule the pcm out
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Legend
Joined: Feb 2005
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From: Fort Worth, TX
right..2003. Okay, so PCM has to be 2001 to 2004. They changed the communication buss to the CTM and gauges in 2000/01.
The 2003 Ram PCM should run it just fine give or take some various issues that may or may come up depending on what features the ram and dakota don't mutually have.
Which flexplate did you use? 94 V8 flexplate should be 8 window neutral balance with one offset converter hole, 97-04 V8 flexplate should be 8 window weighted balance with square converter pattern, all V6 should be 9 window neutral balance with square converter pattern. You will want to use either of the V8 flexplates, but you must use the converter to match either.
Pre-96 flexplate is neutral balance, but the converter has the counterweight welded to the casing. The offset bolt hole clocks the weight on the converter to where it needs to be in relation to the engine.
97-04 flexplate has the weight welded to it, with the converter being neutral balance.
If it dies within 3-5 seconds, that is SKIM activating because the PCM is looking for a gray/green chipped key and you have black unchipped key. If you have a gray key, SKIM should not be a factor. (the key code is programmed into the CTM which then tells the PCM to shut down if it's not detected).
The 2003 Ram PCM should run it just fine give or take some various issues that may or may come up depending on what features the ram and dakota don't mutually have.
Which flexplate did you use? 94 V8 flexplate should be 8 window neutral balance with one offset converter hole, 97-04 V8 flexplate should be 8 window weighted balance with square converter pattern, all V6 should be 9 window neutral balance with square converter pattern. You will want to use either of the V8 flexplates, but you must use the converter to match either.
Pre-96 flexplate is neutral balance, but the converter has the counterweight welded to the casing. The offset bolt hole clocks the weight on the converter to where it needs to be in relation to the engine.
97-04 flexplate has the weight welded to it, with the converter being neutral balance.
If it dies within 3-5 seconds, that is SKIM activating because the PCM is looking for a gray/green chipped key and you have black unchipped key. If you have a gray key, SKIM should not be a factor. (the key code is programmed into the CTM which then tells the PCM to shut down if it's not detected).
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I left the flexplate that came on the motor there here’s the setup 94 5.9 out 2500 ram bolted to the 2003 42re tranny and converter the converter that was on the 94s tranny had the bigger shaft for the converter I did not check for weights on the flexplate I thought all 5.9s had the weights on the flexplate cause of the way there balanced I hope I’m good there?