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Time to change spark plugs?
Hi All,
Need some advice.
2015 m235i auto with Enzo 400+ Package (ECU Flash + catless downpipe). 12,872 miles.
I have a rough idle for the past 1-2 days, sputters a little during idle. Acceleration not as sharp.
1. Is this most likely a plug issue?
2. Should I go with OEM or aftermarket plugs. If aftermarket, which?
3. How difficult to change the plugs myself?
3. If I take it to the dealer, how can I best prevent them from overwriting my flash?
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