8 miles to the gallon on my 87' 420sel - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 02-04-2005, 10:46 PM Thread Starter
BenzWorld Junior Member
Date registered: Jan 2005
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8 miles to the gallon on my 87' 420sel

Only 8 mpg's on my 420...I changed the wires, plugs and filter...could it be the EHA valve? This mechanic is trying to say I may have to change out the injectors which is like $600 a pop. Does he have to change all of them? What should I reccomend he check instead of assuming it is the fuel injectors? Any advice? besides hawking it[:0]

vinny is offline  
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post #2 of 2 (permalink) Old 02-05-2005, 06:26 AM
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Date registered: Dec 2003
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RE: 8 miles to the gallon on my 87' 420sel

assuming all else is normal, injectors maybe clogged with gump and they are dribbling out the fuel instead of a fine spray, put a heavy dose of top grade injector cleaner in and use only 93 octane fuel, also check to see tranny is not slipping. good luck
reliablebruce is offline  
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