i have an 87 240 and i am experiencing some bucking, only not at any particular speed, it will buck or jerk 1 or 2 times and some times only slightly. sometimes it will buck tru all 5 gear shifts. sometimes not at all. usually it will happen while excellerating and just after shifting to 3rd gear.

i've replaced both feul pumps, the little in tank hose, in tank filter sock, feul filter, fuel line (broke the old one changing the filter), plugs, wires, distributer cap, rotor, O2 sensor,and mass air flow sensor. it got better for a little while then came back.

i'm at a loss. my feul economy is sufferring as well. don't know if it's related, but it dropped from 30-33mpg on hgwy to 26-28. any idea's thanks.

any ideas thanks

87 245dl 284k
70 chevy c-20 ????k
68 chevy c-10 ????k


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