Hey guys,
Just wondering if i can get some help/opinions on what could be the cause of my issue.
Its a Jdm K20a with a Rotrex C38-61 SC on it. Its recently been tuned and was running great for about a week.
Now its developed a bad misfire under WOT.
The Car drives good cruising around at low rpm with under 5% throttle, but as soon as i step on it.. The RPM climbs to about 3k and then starts misfiring/hesitating/sputtering. It is as if boost is just blowing the spark completely out.
So far i have tried:
- New TPS Sensor
- Different coilpacks
- Iridium Spark plugs heat range 7-9s with gapping from 0.032" to 0.020"
- Checked fuel pressure (datalogs show that it isnt leaning out or anything and AFRs stay fine)
- New MAP Sensor
- Air intake not clogged etc (Boost is being registered in datalogs, so there is no leaks)
- No leaks on my IM
- Quick visual check over most my sensor plugs that the pins were all still intact.
I think thats about it..
It started after i took the car for a 1hr drive; so heat may have been a factor. I also filled up my car with fuel. Could possibly be a bad batch? even though it drives fine on minimal throttle and cruising?
If you have an idea's id love to hear them!
Any help will be appreciated
Thanks
Ash.
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