I'm posting this as a last resort, I've searched and searched and haven't had any success. I have a 2004 350z that was a manual car, I had computer issues and I was hard up for cash so I sold the drivetrain, motor and transmission. Well a couple weeks ago I bought a totaled out 350z convertible 2004 that would start up and everything for 200 bucks. I pulled all the harnesses out of my Z, and swapped everything over. The car starts right up but the throttle isn't working. I tested continuity yo the ECM on wires on the accelerator pedal and throttle body and it's all good. When I press the throttle it will rev to about 1200 rpms and that's it, throttle wont open up. I pulled the intake to see and it reved to 1200 but the butterfly does not open at all. I'm assuming that's the ECM attempting to open it? I tested the wire that sends a signal when pushing the pedal and it is working.. as I press the pedal it will go up in voltage anywhere from 1 to 5 volts. No signal comes out of the ecm. Trouble codes are p1122 and p1126. Any help would be greatly appreciated....my other vehicle threw a rod so i gotta fix it asap.

 

With the car in drive, the ignition switched on but with the engine not running have you operated the throttle pedal several times to see if you get any voltage drop out? The feedback and throttle position sensors should be operating between 0.36 and 4.75 volts. If your readings are outside those parameters then you have a short somewhere. Either that or you have a throttle control actuator problem or something as simple as a failed throttle control motor relay. Also something else to look out for is a misaligned sealing grommet as a friend had this problem with a grommet between the ECU and the sensor and the problems he encountered were very similar to yours, This misaligned seal allowed in the smallest amount of moisture but enough to cause his Z to run in a similar way to yours. Good Luck.

 

I tried and tried...checked and checked and came up with nothing. I did find a solution though, I had a few mustang 4.6l throttle bodies laying around. I drilled the slots out a little bigger and installed the mustang cable and pedal. I'm back on the road for now at least. I do appreciate the reply!