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Thread: Misfires and lean issues.
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03-19-2018, 09:10 PM #1Member
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Misfires and lean issues.
Good afternoon all!
I have 09 BMW 335xi with JB4 and intakes and running map 5 always.
My car has been misfiring at idle for sometime now.. but now I have been getting misfires at 6-5 gear. Example if i am in 6th gear doing 70 mpg When I floor it I get bad misfires. The only codes I got after my car goes to Limp mode is 29F2 and 29E2
I have changed my plugs and coils about 4k miles ago and my spark plug look nasty .. (pictures included) I did also compression test when engine was hot and I get 165 PSI on all cylinders...
My car currently have 64k miles only and i always use 93 gas.
I have attached picture of codes , picture of my spark plugs that have 4-5 k miles and JB4 logs (no misfires in 3rd gear)
1 log is on map 5, 3rd gear Wot
Second log is map 2 after o2 adaptation reset with Jb4 (Jb4 option 1/7)
Please help i need to fix this before i install single turbo kit,,,,
I have Index 5 injectors BTW
I did also change my fuel rail sensor from another used car trying to fix this issue but didn't get any luck after sensor swap..
My JB4 also goes to Map 4 frequently which is Lean error.
Welcome aqiii,...
NOOOOB: aqiii