Car: MY06 S2000
Mods: Greddy Turbo, test pipe
Plugs: NGK BKNR7 stock gap
Engine Management: Flashpro
MAP sensor: Hondata 4bar

Issue: I tried a WOT pull 3rd gear from 3000RPM-5000RPMs, looking at the AFRs I was seeing a 10.5AFR starting and it leans out to around 11.5-12.5 BUT as soon as I hit around 5k it missfires and the CEL flashes so I back off.

Looking at the datalog, engine RPMs peak around 4500ish (around 1k off from tach) my AFRs are consistent averaging 11.5-12.5 from 3-5k and boost around 7lbs climbing to 9lbs and dropping to around 5 near the missfires

Any input would help...Kinda sucks having the car fall flat on its face WOT and not being able to finish out my tune to smooth the AFRs


NOTE: car was running fine with emanage ultimate, greddy boost sensor, and i was able to go past 5k with no missfires/CEL

Could it be hondata's 4bar map sensor crapping out?

 

did you get the flashpro tuned or your doing it yourself? from what i heard. you dont need a hondata map sensor for the greddy turbo kit . i could be wrong tho

 

Doing it myself. I know im not a tuning pro but I know my basics lol

Stock MAP is only rated to handle about 10lbs..and mine broke due to boost spikes

 

record a datalog and post it. make sure to post the map you're using as well.

 

might be a tuning issue

 

Found the issue

The 4bar Map was acting up and not reading boost correctly

 

thats good.

 

Glad you got it figured out, but why are you using a 7 heat range spark plug? I believe you should be using an 8 or 9.

 

Colder h/r the better. I'd also reduce the gap to help with any other detonation/spark issues.

 

Im not running much boost to be that concerned..that and ive had the electrode part break on colder plugs and that was scary