TPS signal dropping during a 1/4 mile pass

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Joined
Jan 15, 2009
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357
First time at the track since I installed a Powerlogger. After the first pass I look at the log and I see the TPS starting about above 4 volts and then it starts to drop all the way down to low 3's. My foot was to the floor the whole time so I don't see how this can happen. I also recently installed a Casper's volt booster. Could that cause this since it's tied in to the tps? Log file attached.

After the pass I checked tps with key on engine off. Pedal to the floor it was like 4.5 volts.

Track was so crowded I was only able to make 2 passes and on the second one I blew off the up pipe.

tps drop.JPG
 

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