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#1
08-01-2006, 11:10 PM
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vapor lock?
I just had a scary situation with my 98 ML320. I was travelling a three hour non-stop trip in 100 degree temps up here in the north woods of Wisconsin, when during my last hour of travel I lost power when I tried to pass cars or when I gave it throttle over 65mph.
It seemed like bad gas or a plugged fuel filter. (never changed the filter in 1 1/2 yrs since purchase) The next day after the temps dropped 20 deg. it ran great again. Any opinions as to what caused this? The vehicle has 162k and has not had a major service from me. As soon as the season gets cooler I plan on doing a lot of maintainence myself. If the fuel filter is the suspect where is it so that I may change it myself? Is it recommended to add fuel additive, and what kind? 
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#2
08-02-2006, 12:49 AM
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it wouldnt hurt to change the filter, but they are expensive and in my experience rarely are the problem.
by any chance did you use gasohol in the ml? it think it might be a bit more susceptable to vaporlock than straight unleaded. tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#4
08-02-2006, 11:40 AM
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vapor lock
Those are my thoughts on the pressurized fuel injection system. I never had/have this type of problem with my volvos I've had over the years.
No, I don't use gasohol. I've seen a filter for $57 on one of these links. I'm guessing it's the filter as on my older naturally aspirated cars, they've vapor locked or the filter was clogging. Do the Ml's fuel pumps overheat and act up?
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