cis too

[fly944]

Ok guys here goes nothing. I've been dealing with a cold start problem for a while now and am ready to fix the problem. My car 1976 911s is hard to start when cold. It takes a good 30-45 seconds of turning the car over (depending on temp.) to get it to fire, then usually stalls or idles low and slowly comes to life and runs flawlessly. I have already done several searches however just get confused in all the garbage. I would really appreciate any help.

[beepbeep]

Make sure WUR-thingie is working, make sure hoses going to it are tightened and not leaking.

[fly944]

ok, how do i check that? all hoses are in place.

[john walker's workshop]

first, as you work the starter, the cold start valve sprays fuel into the intake, and if you have a decent ignition system, the car will fire fairly quickly. this doesn't mean it will continue to run, as all the CS valve does is get it firing. the warmup regulator takes over from there, and keeps the mixture richer for a few minutes until the engine warms up. the sputtering and popping when it's cold usually indicates that the WUR is a bit off and not richening the mixture like it should. i would first look into the cold start system, if you have to crank for 30 seconds before it will even fire. of course the points and plugs, and general tuneup specs need to be in decent order for best results. search "warmup regulator" or "WUR", for info on how to make it run richer.

[Hladun]

Try reversing the two leads to the thermotime switch (on the left cam chain cover).

[thrown_hammer]

There is a small screen inside the in line of the WUR. Take off your fuel lines and make sure it isn't ubstructed. I blasted mine with carb cleaner and lightly blew it out with an air hose.