Question about 2000 Mitsubishi Montero Sport

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My 2000 montero sport has little or no power when driving up hill

When driving up hill,depending on how long the incline,it slows down considerable to about 20mph or less.whats wrong

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I had the same issue. Going uphill at 50 MPH my Montero Sport would shudder and slow to about 20MPH. It worked ok when the road was level. I thought it was the transmission but it checked out ok. I had new plugs and wire sets so I changed one of the coils. It didn't help. In despiration I bought a good set of wires and plugs. When I changed them I noticed that on one side of the engine my valve cover had leaked and now there was oil around all 3 plugs. I replaced the valve cover gasket. When I went up the same hill that was giving me problems everything worked great.
Side note: In order to remove the valve cover gasket which had been petrofied I needed a small propane torch to heat it up and remove it. Good Luck

Posted on Jan 03, 2013

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First thing I'd do is replace the fuel filter. If the car runs fine on level ground or downhill but struggles uphill, it's usually because a clogged filter isn't allowing enough fuel through to satisfy the engine's demand for enough to keep you at speed going uphill. Try that out - it's an inexpensive part and is usually the cause of your symptoms.

Posted on Apr 22, 2009

  • zabadi mounir Apr 29, 2012

    i have the same problem losing power up hill i changed the fuel filter,i replaced the spark plugs but still the same

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