I just posted this in the 3rd gen section but I'm trying to get as much input as possible.

First let me give some info on my setup...

BDC HBP
850,1600cc injectors 40psi base pressure, supra tt fp
jacobs electronics FC1000 amping anFCleading coil, stock trailing coils
single turbo, catless exhaust.
emmisions removed
PFC w/commander
motor has about 1100miles on it
pulls about -12 inHg of vacuum at 1300RPM

Now here is my problem. I set the TPS following the instruction on this forum but the car doesn't want to idle with the tps at the optimal settings,so I have it adjusted toward the high end(though still within spec)

With these settings I can get solid idle between 1300-1500 RPM. And it is set to stay within that range when my A/C is activated(fans) And also under electrical load(lights). Now here is the weird part. As long as the car is not rolling, the idle will hold. But whenever I'm coasting (to a stop for example) the idle will slowly drop until the car stalls. This happens while the clutch is engaged and in gear as well as when the clutch is disengaged and the car in neutral.

The only time the car will hold an idle while coasting is when The TPS is not set within the corract range(on the high side). It doesn't have to be far off butas long as the TPS is set correctly the car will not coast whithout having to keep giving it some gas.

Is it possible that my TPS is the problem even though it isset within spec?Oris there something else I'mmissing?

The car will idle and drive great if the TPS is set wrong, but I was under the impression that it needs to be withing spec for optimum performance and driveability. Can anyone help point me in the right direction?

Thanx
Cyan

 

Cyan, try this in the PowerFC section and ask Chuck Westbrook. Also, target RPM for idle on your engine ought to be 1200-1400rpm.

B

 

Will do thanx