Throttle Position Sensor

Y

yedister

Member
Have a strange problem. I have a Accel DFI Gen 7.
When starting the engine, it starts then dies quickly.
There is no movement on the Accel dash board for the TPS. When I move the throttle by hand, it response smoothly. I performed a TPS calibration, same problem. Thanks for your assistance.
 
I'm not familiar with this system but I'll take a stab at it.

It looks like you might have overlooked the IAC, or idle air control and/or throttle blade angle adjustment..

Throttle blade angle adjustment determines slowest base idle speed.

TPS monitors throttle position, IAC maintains idle speed when Engine is idling or decelerating to an idle.

Thanks
Randy



http://www.shopsrcracing.com/calibrating-your-throttle-body/
 
The engine ran a few weeks ago, I only changed the spark plugs. The TPS works when it's calibrated. I will check the IAC as you suggested. It does not run long enough to get to operating temp. Thanks for advice.
 
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