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I'm trying to get something more than an anemic 23 highway MPG out of my '88 240DL. It runs well but lacks power (as far as I can tell, I haven't driven other 240s). Is there a good section on FI in the Bentley manual?
So far: new air mass meter, new ignition control unit, new coil, sparks & wires, new battery, new cap & rotor, timing adj. and fuel mixture adj. What else might I look at to see where I'm losing efficiency?
My Haynes manual mentions that a loose distributor shaft will cause poor gas mileage. How would I diagnose problems like that with the distributor?
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