my ignition is stock except an annoying blaster coil............. maybe I will swap the old one back...
gt90stang said:First off is your TPS adjusted correctly and is it actually going into OL or WOT operation. In WOT operation the PCM uses tables to determine the AFR from trim values learned while driving. In my datalogs with Tweecer RT the AFR is pretty close to what is in the tables. For the stock PCM the tables are shooting for 12 to 12.5:1 at OL or WOT conditions and this is what my datalogs have shown. I have leaned mine to 13 to 13.5:1 and notice a definite improvement in performance.
If you vehicle isn't getting into OL or WOT then it would normally run at Stoich in closed loop operation.
Something is out of cal. in your setup and unless you can datalog what is going on your just shooting in the dark. I use Tweecer RT and a WB02 to tune.
Good Luck, Don
Lxpony said:Don,
thanks for your reply- can you please tell me what the TPS voltage should be at WOT?
*****At WOT it should be close to 5V. The stock values are:
WOT & OL breakpoint = 2.713V above idle setpoint.
Part throttle breakpoint = 0.039V above idle setpoint.
idle setpoint = 0.95V or so...must be below 1V.
is a tweecer or custom burned chip the only way to correct the A/F ration at WOT this if I can correct it myself via a AFPR?