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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,638
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Ditto all the comments above, especially Schulisco and HarryD.
Are you a DIY car guy? If so, and the price is good considering it isn't running right (at least $5000 below the market), then go for it. At least it's running, which is a good place to start. The shop that replaced the filter and pump probably were just throwing parts at the problem. Sure, change the filter because it's cheap, but the pump was probably fine. Get the old one with the car, and you will have a good spare.
In CIS, poor running almost certainly is poor fuel delivery. I find that just pouring Chevron Techron into the tank, then driving the piss out of it, will improve the running substantially. Then you can work on the finer points.
But if you are not a DIY car guy, I strongly advise you to keep looking, and if you have the cash, to go to a newer Carrera model, with the G50 transmission cars (1987-1989) being the best of the series. Of course if you can afford a 964 or 993, they are even better...
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
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