I recently replaced my fuel pump on my '83SC and had trouble getting it to start and run. It would start and within a few seconds would die, you could smell the fuel like it was flooded. After letting it sit for about a week, it seemed to correct it self. I got it to start, it really blew some black smoke for a few minutes and now the problem:

Now (cold start) I can get it to start and idle but it is slow to rev and I can hear small backfires (I have a pop-off valve installed).

When the temp goes up after about 2 minutes of idling it will rev freely with no misses/hesitations but it will not idle. I can hold the rev's around 1000 rpm or so and give it gas and it seems to be fine though the rpm range but if I let off the throttle the rpm will drop and it will just die.

any suggestions on what to start looking at?

thanks

 

Hi:

First, I'd bet that it failed to start well due to air in the fuel lines and in the process of trying to get it going you flooded it. Next time, lift the air sensor flap under the air cleaner element until you hear the injectors singing evenly.

You might have either have some trapped air in the Warm-up Regulator or its faulty. The latter is NOT uncommon at all.

Bleed the system by pulling all 6 injectors out of their holders and sticking them into 6 small glass jars. Turn on the key and lift and hold the sensor plate until you see a nice even spray in all 6 injectors. You'll hear them chatter as they atomize fuel,.......

That usually purges air in the system and if that doesn't help, you will need a CIS Fuel Pressure Tester to see what your cold and hot control & system pressures are.

 

Steve,
Thanks for the help, I'll check into what you mentioned on bleeding the system by pulling the injectors out of the holders and check for a even spray from each.

Thanks again,
flagstaff_911sc