is300 2jz-ge vvti turbo won't rev
 

hi
just fitted turbo with internal wastegate set at 0.4bar, no bov, pipes from turbo to intercooler are 2inch and from intercooler to throttle body is 2.5inch, MAF sensor is between intercooler and throttle body, all o2 sensors are in. it gets to about 4000revs and that's it. run sweet up to 4k revs. any sugestions? HELP PLEASE

For starters, I think it may be a problem that you are "blowing thru" the MAF. Easy enough to check, so try "sucking thru" the MAF and see what happens.

Yep, what hodgdon said. I'd also guess that you have a CEL on. I'd address anything that makes the stock ecu turn the CEL on. This car has many ways to go into limp mode.

Did you add fuel? Tune? You cant just slap a turbo on and expect to make mad power lol you need supporting mods. Mostly fuel when you turbo (since youre adding so much air)