Kaolinte

I am on the home stretch of replacing my supercharger and all of my progress came to a halt when I started the car for the first time after the supercharger swap. Initially thought that the high idle (4000 rpm) was due to a few vacuum leaks here and there since I didn't have all of the gaskets and bolts in at the time. However, once I put in all of the gaskets and bolts I started the car again. Same issue 3500 rpm idle....Closed off the IACV, and the car stalled. This should tell me that I do not have in air coming in that is not going through the IACV. From here I plugged the car up to my computer to see what if anything popped out. I noticed immediately that my TPS sensor was reading 5.06v without respect to throttle position (5.06v closed & 5.06v 100% open). Having changed to a different throttle position sensor, I checked my wiring. Everything was okay. to be sure, I cut out the wiring and wired again. Then, I noticed the sensor read 5.06 even with the 3 wires completely detached from the harness. Finally, I wired the original Stock TPS sensor back in. Voltage was still constant 5.06v regardless of throttle position. I confirmed the voltage readings with a MM. 5.06v on red/black & ~5.06v on yellow/blue with KOEO.


Does anyone have any clues as to what is going on? I am at a loss. AEM forums do not have any discussions of this.

Here is some additional background info:

I have been running the same tune without incident since 2009. Since I wasn't having any trouble with the car, I never bothered to update the firmware on the ECU. I am currently running 01V11 firmware.

Any help would be greatly appreciated.

SouthDakotaS2K

It will most likely read 5v when unplugged due to the pull-up resistor in the box. Test each of the three wires with the key on. You should have a 5v supply, ground and signal wire back to the pcm. I would have to assume you have a wiring issue.

BLAQ&GREYs2k

The TPS is bad. Replace it. Should read ~ 0.8v closed and ~4.9 WOT

gettin it

How would you rate the tps is bad? I'm having a smilar issue. My tps us reading 30% throttle in aem with the car off with the ignition on.

Kaolinte

Okay. I figured it out. The 3 pin connector to the TPS was not engaging the pins in the sensor. I wired directly to the sensor and cycled the EMS. All voltage readings went back to normal. 0.5v closed & 4.8v open.

Time to make a new connector.

Thanks for your suggestions.

gettin it

I'll have to try this.

SouthDakotaS2K

Do you have an AEM or factory computer?