Hi all,

I was driving from Amherst MA to New York yesterday. Car (1987 300TD with 186,000 miles) was running fine the first half an hour or so. I began to slowly lose power going up hills. At first, not too noticeable then by another 30 minutes, I crept up the last hill at 30MPH with my flashers on.

I got off the highway, car ran fine under 40MPH. Oil pressure fine, temp gauge fine. I checked the oil level, fine, checked coolant level, fine. I sat and thought about my options and decided to find a mechanic. When I restarted the car, she went fine above 40MPH again and I decided to try and make to New Haven. After about 20 miles as I was coming to New Haven, same thing started happening again.

I eventually made it back to NY driving for 20 miles and then sitting with the engine off for 20 minutes.

My first thought was a fuel problem, but why would it only show up after 20 miles? Second thought was a turbo issue but by the end of the 20 mile run, I couldn't maintain speed even on level ground.

My only other possible clue is that when I had to put the pedal down, I heard a distinct hissing sound coming from the dash.

Car is at my indy mechanic right now. Any thoughts?

Thanks
Tim

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1987 300TD wagon 193,000 miles