I am really confused at this point.. I just finished installing my 780cc injectors and the car was running like ****. So I look at datalogs, idle is at 19.9 AFR, this is a tune JD did for someone else on a similar setup, so I decided to make my own basemap in crome gold.. still no good. then I notice the TPS says 0% when i rev it up in the logs.. check the voltage and I get 0 volts at any position.

So, I've checked the actual wire all the way to the ecu, and it's good. I tested it by grounding a 9volt battery on one end meeting the sensor and checked it at D11 on the ecu side.. it's all good.

Not sure what to do at this point.. I tried another ECU and TPS .. what now???

 

What year? If you are saying that the ECU does not supply 5 reference volts to the TPS, then the ECU is likely bad. Have you checked the VCC2 wire?

 

I just tested voltage between the green/black and yellow/blue and i only got .25v

where is the VC2 wire? I don't have the workshop manual right now

how exactly can i test for 5v from the ecu? I tested D11 and got nothing

 

Sounds like the wire that sends the reference voltage (5V) from the ECU to the TPS is bad. What year?

 

1996.. what should i do now? shouldn't I get a steady 5 volt between those outside wires?

 

I've tried 2 ecus.. both worked fine before this

 

Unplug the TPS connector. Turn the key to ON(II). You should measure 5V from the TPS connector terminal for the YEL/BLU wire to body ground. If not, check the YEL/BLU wire for continuity or a short between the TPS connector and pin D10 of ECU connector D.

 

you are awesome!