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I have a '97 MM 5.0v8 168K that we have owned for 9 years. Does anyone know why all 4 plugs (AutoLite XP104) on the drivers side end up with the center electrode eroded down after ~60K, while the passenger side looks nearly new? I have seen this now on two sets of plus from this engine. I...

Update: With a NAPA bought vacuum/pressure gauge in place of the brake booster and inline w/T at small vacuum hose I get 20psi. This is at idle. When gauge is inline, then pressing brake peddle the vacuum drops some 5psi or so and immediately recovers. Hows this 20psi compared to normal? Has...

Ok I've had the '97 MM XLT at two shops. (FYI-I use the Merc to tow 450gals of water two trips 4 miles every weekend. Tows great I might add. No breaks on the trailer.) First shop Replaced master cylinder w/Reman one, new rear pads, bled breaks, checked psi at calipers (1500psi sound right)...

Thanks for the help... Great site! I,ll get a msg back here when I find the fix. SW.

I need help finding any ideas on my break issue. Can you piont me to area that would have posts on '97 MM XLT AWD with soft breaks. I have used search but can't seem to filter results well. Thanks SW. My post will be something like this: When driving after overnight, break pedal goes to...