[E92TiAg335i]

I just installed a JB4 G5 ISO conversion with FF wires today (all else stock besides Occ and chargepipe.) The car pulls hard in map 1, but then i tried map 5... It feels like it pulls slightly harder than map 1, but if i punch it under heavy load, it will once in a while throw an engine malfunction light warning on my dash. I have to restart my car and everything is fine. It's a 2013 E92 n55 still under CPO with 22,000 miles. Could it REALLY be spark plugs already? The dealer just said they're fine and i'm pretty tight with my TA.

[Mike@N54Tuning.com]

The G5 is an N54 board. Maybe you mean N55 ISO BETA where you cut the diode and load the ISO firmware on an N55 board?

In any event for any tuning advice just post a JB4 log to the n54tech support area and they can help you with that.

Mike

[mike@x-ph.com]

Originally Posted by E92TiAg335i

I just installed a JB4 G5 ISO conversion with FF wires today (all else stock besides Occ and chargepipe.) The car pulls hard in map 1, but then i tried map 5... It feels like it pulls slightly harder than map 1, but if i punch it under heavy load, it will once in a while throw an engine malfunction light warning on my dash. I have to restart my car and everything is fine. It's a 2013 E92 n55 still under CPO with 22,000 miles. Could it REALLY be spark plugs already? The dealer just said they're fine and i'm pretty tight with my TA.

Datalogs, codes are needed so we can help you solve the issue