Hey guys…
I need some support from the N54 experts
I moved to a custom tune on mhd and made some hard pulls/ logs to see whats going on…
Now my problem… At high rpm (something about 6300-6500) i always get some misfire 29CD at cylinder 1….
I changed directly almost everything…
- All 6 spark plugs (NGK ILZKBR7B8G - 0.5mm gap)
- All 6 Delphi Ignition Coils
- New Injector from BMW dealer on Cyl.1
(Index 12 like the other 5)
I tried the OTS Stage 2 and had no problem with that… On Stage 2+ i was able only on 5th gear at 6500 rpm (WOT) make the problem come back…
On the custom map i have the problem on 3/4/5 gear at 6300-6500 rpm (WOT)…
Its a full build racecar with a dct swap but that shouldn‘t matter at all…
I was thinking about the MOSFET stuff but i have a MSD81.
I also saw a guy put some teflon tape on the injector that would help that the injector do not rattle… But usually these problems are on cyl. 6
The compression of cyl. 1 is 8bar while starting car without ignition… and the compression is not going away after stopping to crank the engine…
I‘m a bit confused. Could it really be a problem on the head? Valves? Head Gasket? Piston rings? Or some other stuff? Or is it a electric problem? I don‘t know where to continue to search for the error.
I need some support from the N54 experts
I moved to a custom tune on mhd and made some hard pulls/ logs to see whats going on…
Now my problem… At high rpm (something about 6300-6500) i always get some misfire 29CD at cylinder 1….
I changed directly almost everything…
- All 6 spark plugs (NGK ILZKBR7B8G - 0.5mm gap)
- All 6 Delphi Ignition Coils
- New Injector from BMW dealer on Cyl.1
(Index 12 like the other 5)
I tried the OTS Stage 2 and had no problem with that… On Stage 2+ i was able only on 5th gear at 6500 rpm (WOT) make the problem come back…
On the custom map i have the problem on 3/4/5 gear at 6300-6500 rpm (WOT)…
Its a full build racecar with a dct swap but that shouldn‘t matter at all…
I was thinking about the MOSFET stuff but i have a MSD81.
I also saw a guy put some teflon tape on the injector that would help that the injector do not rattle… But usually these problems are on cyl. 6
The compression of cyl. 1 is 8bar while starting car without ignition… and the compression is not going away after stopping to crank the engine…
I‘m a bit confused. Could it really be a problem on the head? Valves? Head Gasket? Piston rings? Or some other stuff? Or is it a electric problem? I don‘t know where to continue to search for the error.
Attachments
Last edited: