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Old 10-15-2003, 06:08 PM
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EricSilver EricSilver is offline
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Join Date: Mar 2000
Location: Fairfax, VA
Posts: 1,248
At $25/injector to clean, it makes sense to instead buy new ones (at about $23/each).

The pattern of the stumble, because it has been going on so long, would seem to support your link to the injectors because it seems the same cylinder is misfiring. The feel is consistent every time.

I thought about using more Techron, or that BG44K (?), but it am doubtful of how effective it would be. It would also be great if I could figure out which injector was the really bad one.

So, another question:

Why does the injector, if that is the culprit, behave normally
on cold starts? What would make the fuel flow consistent at
start, and then inconsistent after the car has been running
(assuming also the 5 year-old O2 sensor is working properly)?
2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
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