Join Date: May 2011
Vehicle: 2003 Dakota 4X2 quad cab
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Just bought a 2003 Dakota Quad Cab 4X2 with the 4.7L
Have been a bit dissapointed with the performance of this motor.
I have a scan gauge which reads a few different things and noticed the following which seemed odd.
1. Timing advance at WOT is around 13-14 degrees at around 3000-4000rpm and slowly climbs to 21-22 near redline (no knock detected). I haven't encountered too many motors with such low timing advance, aside from heavily boosted motors.
2. TPS voltage reads 3.6 @ WOT (seems a bit low). With throttle closed, I am getting 0.50. I checked and the throttle is opening all the way. I have loosened my tps sensor and retightened it. This has now given me a closed tps voltage of 0.56 and a WOT voltage of 3.66. Is this low?
1. do any of these values seem low?
2. Does a battery disconnect usually help reset the pcm parameters on this truck?
Also, worth noting, a dodge dealer flashed an updated file onto the PCM (as there is a sticker in my engine bay stating so). I read that there were concerns about engine knock a few years back... is the reflash meant to lower timing advance and reduce knock?
Last edited by blacksrt4; 05-30-2011 at 11:18 PM.
Reason: added details