Quote:
Originally Posted by beetle6986
My misfire has only gotten worse. Last week I checked cylinder compression. They were all very low but close in numbers. The cheap harbor freight tester I used reads low because of how it is designed. I just finished the walnut blasting last night and that didnt help either. Below is what I have done to date. Getting tired of BMWs. Dealing with this is a PIA and now I found out my 2013 X5 needs a new engine (uses a quart of oil every 600 miles). These cars just seem too unreliable.
exhaust vanos replaced
new oem plugs
new oem coils
walnut blasting
compression check
swapped injectors with old injectors I had from other cars. made no difference swapping out 2 at a time.
Next
intake vanos replacement
Remove JB4 tune?
Replace precat 02 sensors?
Swap more injectors around or just buy a set?
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I replaced all of the injectors with index 12 injectors and the car still misfires! I guess I will remove the jb4 and see if that could be causing it. then do O2 sensors next. After that.... off to the junk yard and I'm done with BMW. I'll go back to american made.
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2008 335xi - JB5 ISO e50, VFSR catless DP, DCI, VFSR FMIC. Fuel it stage 1, VMR V710s. 407/446 rwhp/rwtq.
2004 Cobra - Basic bolt ons with a tune. 450rwhp/rwtq450. Port coming soon.
2013 X5 50i - muffler delete, xHP tune, ESS tune on the way.
2016 Mustang GT Roush Phase 2 with VMP 767 HP kit.