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Old 09-01-2002, 11:06 PM
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Join Date: Feb 2001
Posts: 199
Lightbulb I think I'm on to something

Hello everyone,
I have been trying to figure out why our '89 190e 2.6 seems sluggish and sometimes knocks bad during acceleration. Sometimes it is smooth and peppy. Could the timing not be advancing correctly? and how would I check it? Thanks to all, Have a good holiday tomorrow!
German autos!!!
'67 250se coupe
'89 190e 2.6 (gone but I kinda miss it)
'96 c220
'07 BMW x3
'59 0319 diesel Omnibus...the "O"
Italian bikes!!!
'64 Lambretta Special 185 hot rod scooter
'66 Lambretta SX200
'59 Lambretta 250 race bike
'70 Lambretta GP200
'77 860gt ducati
'66 ducati monza
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Old 09-02-2002, 04:00 PM
Registered User
Join Date: Jan 2002
Location: England
Posts: 1,841
Not sure about the 6-cyl, but the 4-cyl 190E has easy timing adjustment by twisting the distributor (undo the allen-bolt). I can't figure why your performance should change at times, and the knocking is only occasional (unless you're changing fuel), could the allen-bolt be lose? Sounds unlikely but worth checking & tightening.

You should cure the knocking first. If you don't have the oscilloscope & equipment for this, timing adjustment is easily done by any half-competent tech. From here I guess you can then see if you still have poor performance.
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
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