As of June 14, 2026, I will include an additional attachment in my D-Jetronic Fuel Injection Pressure Test kit. This will allow you to avoid pulling the hose of the cold start injector if you so choose. This 10-minute video will show you how to attach the gauge hose using this optional method.
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1970 to 1975 3.5 4.5 D-Jetronic Fuel Injection Pressure Tester w/ Video Instructions
Testing fuel pressure is a simple procedure on the D-Jetronic engines, but it is ABSOLUTELY essential. If your fuel pressure is off even a few pounds, it will dramatically change the fuel mixture, and your engine will end up running too rich or too lean.