[rbuswell]

Originally Posted by djnolan

To check fuel pressure: Fuel Pressure - Checking

Not sure if this would rule out a partially clogged filter and fuel delivery problem but a good place to start.

Vacuum line routing here: Fuel and Vacuum Line Diagram (1985.5 and Newer N/A 944s)

If you have a fuel pressure gauge that doubles as a vacuum gauge I think it should read around 17 Hg at idle.

The filter is a Mahle and has nearly zero hours so unless the tank was totally full of sludge, which is a possibility, that doesn't seem likely. I drained the tank when I first bought the car since it had sat for a few years. It looked clear and I even ran the fuel in our lawn mower. Time to crack open the bible we all know as Clark's Garage. It's also befuddling why it happens in a fairly narrow range of driving.

Given the age of the car and having no idea how old nearly all the consumable parts are, I'm tempted to start throwing parts at it. I'd like the car to be my daily driver and road trip car (i.e. reliable). I'd replace a lot of that stuff anyway.