1jz surging idle running rich im about to burn it

[DeSloth]

This still sounds like ECU. It was a 1JZ type fault. It may be worth getting one recapped. The issue is not always visually evident.

 

[OhBeTrice]

So ive ohm tested my 5v system tps map o2 cts etc they all ohm out fine. Its a stock fpr I've tried 2. I've tried 3 ecus

 

[Suprapowaz!(2)]

Is your ECU trying to add or pull fuel? Is there a way to see what Vf is doing? As Foogoo mentioned, I'd get a pinout and begin Ohm'ing out everything.

 

[RacerXJ220]

Check the cam sensors and crank sensors also. I had one tooth off between the cam and crank and it missed badly under load so it is possible yours is maybe a timing issue. The polarity on the cps plugs might be off too.

Mechanical faults would be next to check.

Are all the plugs fouling?

 

[DeSloth]

I've tried 3 ecus

I have three 1JZ ECUs in my possession which made my vehicle run with symptoms as you describe. It is an accepted type fault, that is to say 100% of ECUs are affected.

It appears that you have tried everything else reasonable, getting an ECU recapped might be a good way to fully eliminate that as a cause. Good luck