nnivlemm

My 1jz swapped SC is breaking up as you rev it through the RPMs, and I don't know why. It's not the coil packs, or the MAP sensor, spark plugs are gapped properly, so I was wondering if anyone had found similar issues and fixed them.http://http://www.youtube.com/watch?v=uxk0WodV5mg

mr/griffin

hareness, sounds like weak bad ground or short something. maybe fuel filter. weak pump kinked line maybe
what fuel you running

scviolence

iTrader: (17)

what are your plugs gapped to and are you running any kind of piggy back ecus? any check engine lights?

meangreen1

iTrader: (13)

Check your fuel system. Whats your fuel psi when reving?

6SOARER

iTrader: (20)

Sorry to hijack this but since everyone is talking fuel system, How would one run a fuel pressure test on a 1JZ?

I borrowed a Master Fuel Tester kit and theres no way I can get the fitting on the Fuel Banjo bolt that lies at the end of the fuel rail. The adapter will fit but the fitting from the testers line hits the firewall.

Is there any way to test fuel pressure by the fuel rail?

meangreen1

iTrader: (13)

Make a "T" in the rubber hose and put a gauge in there. Simple test to elem. this theroy.

6SOARER

iTrader: (20)

Before when the GE was in there was no problem with fuel pressure, after I dropped in 1JZ the problem began. I wanted to put the gauge after the fuel dampner but the lines are steel. .

Im assuming pressure is good from the tank up to the dampner. Im questioning the line from the dampner to the fuel rail. I had a custom line made cause the stock link was all kinked and I initially thought that that was my problem.

RyanV

iTrader: (9)

Maybe look inside the ecu for damage.

Coil pack wiring