Help with 2JZ Aristo Swap

[Dr Tweak]

Hey everyone,

I've ran into a problem that has me stumped. I have a car with an Aristo 2JZ swapped in. The ECU being used is the Aristo automatic 2JZ unit. The engine runs, but for some reason it will NOT rev over 4000 rpm. When it gets to about 4000, it starts popping and backfiring. I've ran the codes, and get a code 12, but the wiring for the cam/crank sensors is good and I even replaced the sensors with no effect. Has anyone seen this problem before? Any help would be great.

-Doc

 

[tissimo]

I've heard of a code 12 being the timing belt has slack in it/ maybe jumped a tooth..

 

[Dr Tweak]

I did check the timing belt and it is spot on, but I will add that to my list of things to check again.

 

[csnow]

How was the wiring on this? I am going to use the Aristo harness with Tissimo's help. Did you leave the ignitor on the passenger side or move it over to the driver side?

 

[OneJSupra]

Hey everyone,

I've ran into a problem that has me stumped. I have a car with an Aristo 2JZ swapped in. The ECU being used is the Aristo automatic 2JZ unit. The engine runs, but for some reason it will NOT rev over 4000 rpm. When it gets to about 4000, it starts popping and backfiring. I've ran the codes, and get a code 12, but the wiring for the cam/crank sensors is good and I even replaced the sensors with no effect. Has anyone seen this problem before? Any help would be great.

-Doc

Hey Doc...maybe be worth trying , see post #4 > http://www.supramania.com/forums/showthread.php?t=46093

 

[The Reaper]

ever think of using another aristo ECU to check to see if you get the same ill effects?

 

[csnow]

If you want to try another ECU, I have one. Just pay the to and from shipping and make sure you return it

 

[Dr Tweak]

Already tried two different ECUs, no change. I'll check out the IDL wire though.

I wire these up all the time and never have seen this problem before, but I normally do them in Supras, not 240s. The cost on this conversion in a Supra is $450 plus $30 for shipping for a plug and play harness.

-Doc

 

[OneJSupra]

Already tried two different ECUs, no change. I'll check out the IDL wire though.

I wire these up all the time and never have seen this problem before, but I normally do them in Supras, not 240s. The cost on this conversion in a Supra is $450 plus $30 for shipping for a plug and play harness.

-Doc

2JZ on 240...that is sweet. Doc, is the 2J staying twins or you're putting a single turbo?

 

[Boostage]

DR tweak, arent you the person that make/sells harness' for 240 1jz's on ebay?

 

[tissimo]

maybe a cps is going out

 

[Dr Tweak]

Yeap, and I've never seen this problem before.

The 240 is staying with the twins for now, but you know how that goes

-Doc