Greetings all, my name is George; I'm new to this site. I'm hoping one of you Honda Gurus can help me with my TPS problem it's been driving me nutts for weeks trying to figure it out. I just did an engine swap. After completing my swap, the TPS became a problem. I bought a new one; I noticed the GND and PCM power prongs where flipped on the aftermarket TPS; I cut my connector and rewired it. That fixed the signal output issue, where before my voltage was going in opposite directions when opening the throttle. I'm able to get my voltage reading to .5 something volts, but I can only get the high voltage to 2. 5 volts WOT, and I noticed my voltage reading is in the negative on the multimeter. With the TPS connector plugged in, the car won't even start, I get a crank, no start situation. When I unplug the connector from the TPS. the engine starts right up and sounds fine; I drove it and if felt fine but it did start to bog out.Can the issue be on the throttle shaft itself or can the issue come from the PCM signal ?? Any feedback would be greeting appreciated. Thanks guys.

 

Rewiring is never a good idea. Don't have a wiring diagram in front of me, so can't give you electrical tests right now.

If you unbolt the TPS, and turn the TPS with your hand, can you get the 0.5 to 5V output?

 

Wiring was necessary for the aftermarket. My wiring Is good , I have a clean contact, I soldered my splices. Im familiar with the tps calibration. The issue is the voltage ranges that Im getting. Starts at .5 and only opens to 2.5 volts. This is after adjusting the TPS to get my .5 volts.

 

The reason I asked to remove the TPS and turn by hand is to see if you got the TPS key installed properly into the throttle body.

I also thought that you got the wrong part with a higher resistance, so you will only get a 0.5 to 2.5V. The actual wiring could also be the issue, where you would have to do some voltage drop tests.

 

Thanks bud

 

Can you give us the colors of the wires you have connected to the TPS.
Just wondering if you swapped the TPS and the IAD plugs since they are the same shape.