Sometimes. The diagnosis chapter from the 97 manual is here: http://users.757.org/~ken/T/04-Diagnostics.pdf

On the topic of ignition I am having great results with OEM wires and OEM plugs and old coils with 130k miles.

I have not had to troubleshoot any engine problems with my truck yet but in another world where different rules apply my idle problems have always been caused by vacuum leaks which could be anywhere. first test is to remove the oil fill cap and see if the idle is different smile


97 T100 4x4
97 328i
95 540i restoration project