I have the same problem with my dynatek box. What is the diagnostic jumper? And is there a part number so I can order one? They also told me to check the TPS. Thing is, I checked voltage from the stock wire and it was within spec on both legs. When I checked it on the dynatek harness it reads low on one leg and right on on the other. It seemed strange to me so I got another box and harness and got the same results.
Beside the fuse box, there is a 6 wire white connector, there
is a light blue wire and a black wire that come into the
connector, Take a large paper clip, cut it off so it looks
like a large U shape. Sharpen the ends a little bit and
stick it into the connector, so the Blue and Black wires
are in contact. The white connector is where the
dealer plugs in his fancy diagnostic machine, but for
our use jumpering the blue and black wire lets us read out
the codes, clear the codes, set the Idle Speed Control and
the Throttle Position sensors, Just follow my instructions
in this post and you can do it all.
To set the Throttle position sensor, you have to remove the
front fenders as the sensor is on the rear of the Throttle
body and the two retaining screws are impossible to reach
with the body on, To set the sensor loosen the screws
slightly with a #25 Torx bit, barely move the sensor in a circular motion until the
little indicator on the pod is centered, recheck the
indicator after you tighten the rataining screws as it sometimes
moves a little, keep adjusting and tightening until you get it perfect.
When you set the Idle Speed Control, Make sure the engine is warmed
up to operating temperature.