First, I'd check to see if the code actually is for the MAP. Get the problem code number, and check this out online. (Sorry, but a lot of dealers are unscrupulous.) I haven't changed the MAP on my Windstar, but they are usually: 1) available at any auto parts store (~$50-$80 try Pepboys, Autozone or Advance Auto online), 2) unplug the old, plug in the new (might be a screw or two holding it in place). This is really a do-it-yourself job. Usually, electronic parts like the MAP sensor are non-returnable if it doesn't turn out to be the problem. And before you do anything, I would carefully check all your vacuum lines for leaks, especially the PCV lines, and the hose going to the MAP.
CraigRK |