Hey, I've got a question. So i replaced the EFI harness in my 91 300zx TT due to whoever worked on it previously lost all the metal clips and broke all the coilpack connectors and that i was getting a wierd missfire at idle that could b remedyed by wiggleing the injector harness. I pulled the old haerness and replaced with the new one i ordered from westcovinanissan. While i was unhooking the old harness i noticed whoever had it beofe me had stuck a piece of wire in the passengers bank wastegate solenoid plug. I diddnt think too much of it and went aobut my work. After getting the new harness in and pluged in i got the car to run. It runs beautifully at an idle and great as long as you dont boost. After you make more than 0-1psi it acts like it dosent want to spool and bogs out and smells liek it runs extremely rich and it wont come out of it. So i guess my question is did the ground wire that was added to the wastegate plug needed for some reasion or is my problem somewhere completely different? Meby give me some ideas for other things to check?

 

Try to put that ground wire back and see. I have a random ground running off my ptu wiring by the precious owner. But since it works, I'm not gonna mess with it.