Originally Posted by das kommisar12
I am new subscriber and in need of some desparate advice. i have a 1998 740il m60 engine w/ 130,000 miles, i finally did a compression test.the psi results are as follows: dry test- cylinder(s) 1-175,2-125,3-125,4-185,5-170,6-140,7-165,8-155 now comes wet test: cylinder(s) 1-180,2-165,3-180, 4-195,5-185,6-190,7-200,8-185 do you folks know what the limit range is for this engine? My foremost problem is misfire. I was strongly advise to start with compression test to first rule out any mechanical problems prior to testing fuel and electrical issues. Your collective opinions most appreciated!!! das kommisar12
your "dry" numbers suggest you have a big problem with 2 and 3 but the "wet" look to be fine, with compression its not so much the number but rather the consistency of the numbers in all cylinders, as a rule 10-15% or less in variation would be ideal.
what is wet and dry?