84 Porsche 911 firing problem

[jlittle]

Have a 84 Porsche 911 that doesn't have ignition firing (coil wire out at distributor) until you release ignition switch ( firing from coil wire then) there is 12 volt at coil during cranking. engine will start sometimes and run good only after releasing ignition switch. thanks for any help

[thelawnmower]

you might try the porsche forum. youll more than likely get a few more answers.

[jlittle]

I did already, no reply thanks

[boschmann]

It sounds like a bad ignition switch to me. The coil should have power in run & start positions.

[jlittle]

thanks boschmann I should have give more detail, after engine reaches normal operating temp it will start when in cranking position from ignition swich

[boschmann]

Have you put a test light on the + (15) terminal of the coil to see if there is power in the cranking position when cold?

[jlittle]

there voltage at t 15 in both on and crank position, I just drove the car 200 miles with no problems other than the first time I started it, by turning to crank postion then releasing switch, it takes a few times but it finally starts, I also put a remote start switch on starter. leaving switch in on position and using remote to crank that didn't help thanks

[boschmann]

I take it that says there is 12V in both positions. Do you think it could be a fuel pressure problem, particularly bleeding down pressure after it sits for a while?