Originally Posted by blacksrt4
Just bought a 2003 Dakota Quad Cab with the 4X2.
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 not 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?
A 4.7 "Death Flash" does not exist because they were not prone to the intake valley oil leak that the 3.9/5.2/5.9 engines were.
However the stock timing advance on the standard output 4.7 engines is stupid weak. I ran up to 30* on my 4.7 above 4,600 rpm. Stock my 4.7 Ram would retard to -15*BTDC on a WOT stab at idle, slowly climb back to 0*, then start a slow creep up to 18* @ 2,600 only to fall back too 15* @ 3,600, then a slow climb to 28* total at the 5,600 rpm fuel shut-off.
Adjusting the TPS to increase form 13% to about 18% at idle makes it read closer to 80% at WOT rather than 73% that I saw stock. The part-throttle and WOT shift points all increased to a much nicer RPM, also delaying the TCC lockup slightly.
As for timing Superchips 91 program will add a large amount of timing and make the truck run much more responsively.