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Converting a 1.7 or 2.0 to Webers as opposed to keeping the FI and getting it to work right is probably the most-repeated topic here on the 914 PPBB. While I'm a strong proponent of keeping the FI, I'm going to write up as unbiased a pro/con web page as I can on the topic so that we can refer people to it.
One thing that I hear often is that conversion to Webers is cheaper than keeping the FI and fixing it - I don't believe it. If you're buying new parts, a twin 40IDF conversion with everything you need (fuel pump, pressure regulator, linkage kit, manifolds, carbs, seals, etc.) will run you a minimum of $750 from what I've seen on the web. If you already have FI on the car, you can get a rebuilt ECU for about $250, rebuilt MPS for $250, new TPS for $100, new head temp sensor for $20, new trigger contact points for $75, new intake boots for $20, various seals for another $20, and get your injectors cleaned for about $25. Total is about $760, or the same price as the Weber conversion. I'm assuming here that your air temp sensor is OK, wiring harness is OK, fuel pump is OK, and that you can fix your aux air regulator if it is sticking. Add in new hoses for a few more bucks and you've almost completely refurbished your FI system. And that's assuming that ALL of those parts are bad - which is unlikely. If you go with good used parts, the cost is far less (also true for the Weber conversion, but used Webers are often in poor condition and need lots of TLC).
Brad Anders
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