Porsche 944: Automotive Repair Manual--1983 thru 1989, All Models Including Turbo (Haynes Manuals): John H. Haynes, Larry Warren, Chaun Muir: 9781850106579: Amazon.com: Books
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Cooling Fan Operation and Troubleshooting - Clark's Garage
Project 944 Turbo - Avoiding Boil Over & Coilover Install
Throttle Position Switch - Information, Troubleshooting, Replacement, and Adjustment