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i changed both knock sensors with new ones. I forgot to pull the ECU 15 fuse but I took off and it was still the same symptoms. I also noticed that the first Knock Sensor I pulled out had a smaller hex size on it and a different color connector, my thought was that it might be a non-turbo knock...

If those other things don't work I would check out your Throttle Position Sensor. When I put my new engine in my car did the same thing except it would fluctuate from like 2500 to 3000 rpms.

If you have a jdm engine that should be the heater hose for the heater outlet. and where it should be on an american engine theres a cap. I had the problem where my heater wouldn't work and when i finally took my top end apart to put a HKS gasket on I realized the heater outlet hose i had hooked...

test your igniter and make sure thats good and if its not i have one i'd be willing to sell you.

I welded up my own 3" intake pipe to compensate for the lexus afm, and i just welded on two nipples for the pcv and the iac I didn't put the the bov one on because I have a Greddy Type RS one.

how do i know what knock sensor is bad?

I just did a Lexus MAFS/550 upgrade over the winter and now when I get going and floor it the turbo spools up real quick to like 12 psi and then it just makes popping noises and the car just doesn't have any power. I think it might be a boost leak but the thing that confuses me is that if I just...