Quote:
Originally Posted by chenium
I'm going to save my original injectors and have them cleaned as a backup
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Please be advised that no amount of cleaning will restore any internal components of the solenoid valve that have been corroded or damaged by the ethanol in modern gas. The Porsche community has been plagued by this (among other factors) for years with bore scoring and many other platforms experience fuel system problems with higher ethanol content.
A tech I know says fuel injector problems are very common on S85 engines so it is no surprise that has trickled down to ours. Wild guess on my part but I often wonder what the effect of ethanol in our fuel systems has in conjunction with the use of the cars. Do garage queens suffer more from injector failure than daily driven cars? Is long term ethanol soaking degrading fuel lines/o-rings that perhaps weren't specified for long term high ethanol content fuel? I'd like to think M engineers were more pragmatic than that.
Apples to oranges comparison but I have an 08 STI with the original injectors/coils fuel pump that I daily drive in nearly bone stock form with no added boost and have yet to experience any fuel related problems over 168K miles. But I know e85 turns the fuel lines to mush on Subarus of that vintage. My injectors on the M3 were replaced 6K miles ago to troubleshoot some hesitation issues that were actually x-pipe related according to the previous owner. So I have a little peace of mind for now but, as a weekend car I worry way more about the M.