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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > JB4 n20/26 EWG map 2 misfires
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      02-16-2017, 05:48 AM   #1
F30Nati0n
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JB4 n20/26 EWG map 2 misfires

I am running jb4 map 2 with downpipe and intake. 0-70 is perfect but after that I start to get misfires and a big reduction in boost. What could be the issue??
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      02-16-2017, 05:25 PM   #2
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Maybe you need to change your spark plugs? How many miles does the car have? when was the last time you changed the spark plugs?
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      02-16-2017, 05:59 PM   #3
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Quote:
Originally Posted by F30Nati0n View Post
I am running jb4 map 2 with downpipe and intake. 0-70 is perfect but after that I start to get misfires and a big reduction in boost. What could be the issue??
Could be spark plugs or fuel pump
Datalog and post it on n54tech
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      02-17-2017, 09:23 PM   #4
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misfires

The car has 10,500 miles on it but the engine was replaced at 7500 after I managed to throw a rod. So 3,000 on this engine cant imagine I would need new spark plugs. Also as far as posting the logs I cant seem to get it to connect to the interface. Everytime I try to connect it with correct port number and all the correct steps followed it shows up (FailedCom#4). I then tried com 1-9 and nothing worked. what could be wrong there?
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