Stumble and Back fire

[Ben's Z]

The 77 smells like it is running rich and the spark plugs tell me the same. I get a backfire and stumble pulling away from a stop under partial load at low revs. That being said I seem to be getting the same problems others have had I found searching similar posts about EFI problems; and all those seem to indicate air bypassing the AFM or the coolant temp sensor; and others indicate a lean condition with that. My boot seems to be in good shape. What kind of tests can I run on that sensor to check that? Any other suggestions? I want my pile running as good as this pile will run for my trip to Fredericksburg next month.

After this trip I am going to pull my Turbo motor from the parts car, have the head refreshed and put that in the 77 anyhow.

[cozye]

Running rich sounds like a coolant temp sensor. Use test procedure in fsm to check

[Ben's Z]

I assume that will require using an ohm meter. I don't know my arse from first base with an ohm meter..... What should I set it on?

Running rich sounds like a coolant temp sensor. Use test procedure in fsm to check

[cozye]

Resistance, ohm, depends on the brand as to how it's labeled. It's really easy.

[Ben's Z]

I downloaded the file but it says it is corrupt and I can't open it. Do you have the information on what the coolant temp sensor resistance parameters should be?

[Zed Head]

The 77 file is the whole FSM, the 76 or 78 is broken in to chapters and will probably download and unzip. They all use the same sensor. Engine Fuel section.