So, I have an 03' Dakota 4.7 that we tried to tune yesterday. No go. I'm assuming that I have the JTEC (early 03') and not the NGC (later 03'). What could I swap this out with to make it tunable without issues? Does it need to be from a Dakota or will one from an 03 Durango work too? Looking to pick one up from the junkyard, or aftermarket, if someone has the correct part number. We will be eliminating all O2 sensors and all emissions, so that won't be an issue. Anything else that I should know? Thanks in advance!I hope this helps...
1999-2002 4.7L - Jtec PCMs (3-plug PCM) use a 16 tooth tone ring
2003-2007 4.7L - NGC PCM (4-Plug PCM) use a 32 tooth tone ring
2008-up 4.7L - Im not sure, they may still use the NGC 32 tooth tone ring.
Also the CAM tone ring goes hand in hand with the PCM as well...so you need to make sure your camshaft tone ring goes with the correct crankshaft tone ring with the correct PCM.
The transition was done in the 2003 year and you may find a Jtec in a 2003 year 4.7L... So double check the PCM to make sure what you have.
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