Hello everyone,
I'm new to the forum and hope maybe someone has an answer for me. I have an 85 500 SEC Euro and when you first start it up in the moring it will idle fine until you try to give it gas. Then it wants to die, sputter and acts as it is getting no fuel. Once the Temp hit about 80 Celsius on the temp gauge it runs just fine. Ive tried all the basics, Plugs, Cap, Rotor, Wires and even the cold start valve. Any ideas would be a great help. Thanks Ed

flat spot during acceleration = control pressure problem according to trouble shooter, you need a fuel pressure gauge to test it

Would a fuel pressure regulator only do that when engine is cold and then work fine when warm up?