I still have not figured out why im not getting power to my fuel pump , relay , or fuel pump fuse but still when i run a wire from my battery to terminal G under my dash everythings work besides my throttle body injectors and i have power to one wire on each injector i dunno if one is a ground or not.But i did find out something new i have a fuse that was blown so i put in a new one and it blew it as well.I dont know what fuse it is cuase the writing has rubbed off.... its the third fuse over , second one from the bottom between the RDO fuse and the cruise fuse and its a 3amp fuse.I looked for a diagram couldnt find one. Can anyone please help me out here.


Thanks
Spencer

 

The label on that fuse is 'ECM IGN' If you can give me a fax number I will fax you Fig 8A-116--Fuse Location.
Ron

 

My fax number is (256)405-1409 .. thanks for this

 

The fuel pump relay should have 2 powers and 1 ground. The ground will only be activated when you 1st turn the key on or spin the engine over as the ECM take the ground away if it does not se an rpm signal. You should have 2 power sources to the fuel pump, 1 the relay and 2 the oil pressure switch as a redundant power supply. The 3a fuse is probably ECM fuse and if it is blowing, bad ECM. You probably have no injector pulse and you would need a noid light to verify that. The ECM grounds one side of the injector for 2 to 5 milliseconds which creates the injector pulse as that energizes the field coil in the injector and lifts the pintle to allow atomized fuel to spray in the throttle body bore. Sorry for being a little technical.

 

OK,looks like the fax went thru. Have you been able to get the ECM checked? Everything I read on your posts keeps pointing to the ECM.
It's probably a good idea to keep the problem in one thread,that way anyone who happens along will know the whole story instead of just the last half?
If you don't already have one I would highly recommend the regular shop manual. I have paid for mine many times over by not having to take the car to one of those $100/hour mechanics! Good Luck!
Ron

 

You can go on Ebay and get a cd in .pdf form for any of the C4's cheap. Just put in "84 Corvette Shop Manual" and you will get lots of hits.