1jz tuning issue

[patchat88]

Hi,

I went single on my supra 1jz this winter and I have some tuning issue with my emanage ultimate.

My engine setup is:

- 1JZ stock engine
- BKR8EIX plugs
- Kenne Bell Boost-a-Spark
- Emanage ultimate and greedy map 3bar
- Borgwarner 88-75 turbo with a Quick spool valve
- 630 cc top feed injector with dual feed rail setup with a walbro 400 in-tank
- Water/meth kit
- 3'' exhaust from the turbo to the rear

I tuned it at 8psi and the a/f ratio is at 12.0 on all the pull in every gear without knocking so I raised the boost at 10 psi it start to have some misfire in the 5500 rpm range and if I put more boost is worst. At first i was thinking my ignition system was weak so I inspected all the coil pack and everything look fine, after that I have added the Boost-a-Spark and raised the coil input voltage to 15volt. Is a little better but he still cut when I raise the boost and when I go WOT.

One of the other issue is sometime the timing in the datalog is way out of range like 100+ degree of timing so I think maybe my problem come from there.

Let me know if some one have some idea to resolve my problem


Thanks

 

[cpederson]

plug gap and figure out that timming issue

 

[hvyman]

None of the coils have cracks under the blue boots?