Saying Hello & looking for an answer
Hello to all,
I have a 1997 540I that I have managed to put 260,000 miles on and up till now has been almost trouble free. Recently it has been starting to run rough. I took it to my regular mechanic who pulled the codes and discovered a leak on the intake mainfold seals along with a bad Knock Sensor. After all of the work is said and done, there is no codes showing with almost 1k in miles and it has started "Flatening Out" when on the freeway in the 2000 rpm in range. It almost seems like the timing is retarding or maybe something electrical (coil cut out). YET NO CODES.