It's not a battery voltage problem. The throttleblade is usually a few degrees away from being 90 degs so that sounds normal.
Something else is not right. Is the iac screw emerging the usual approximate 1.5 threads or so out of the tb?
Unknown at this time. IAC unit was swapped from original TB straight over to new TB (bottom side of TB).
The screw that would be considered an idle adj screw on a carb, shows about 2 threads extended.
I performed a voltage test on the TPS gray wire. Less than 2V. Supposed to be 5V I think.
Battery is about 12V now. Not up to 13+V.
This engine had the top-end removed down to the block. Heads, valves, springs, gaskets, ARP studs. New timing chain & oil pan gasket. New HR motor mounts. TA Perf D-side header. New TT 80# inj. w/new chip & Racetronics inj harness. Razor alky system installed w/3.5Bar stainless MAP. Caspers audible knock detector installed at ECU. 5V to MAP taken from gray wire at ECU & routed through firewall at speedo grommet to back of intake manifold. That wire reads the same as the gray wire at TPS. Green wire from MAP to Alky PAC reads .6XX (less than 1V)
Grounds at rear of passenger head cleaned & returned to original location. Same with battery ground to engine block.
Ground from MAP to firewall by master cylinder.
Redundant ground at battery to fender-well location.
