Relay? Something else??
 

Guys, I was out of state for a long time but now have replaced the relay - after thinking I had troubleshot it for a bad relay - and the car still won't start. Turns over great but makes no attempt to catch.

This is what I have troubleshot so far:

1. Has new air filter (and sometimes no air filter during testing)
2. Has gas in tank (was already partly full and added 4 gallons)
3. Fuel filter is CLEAR (removed and blew through it fine)
4. With or without relay (old, new, connected or not) female test lead hooked to 12V + makes fuel pump whine - it's not the fuel pump itself, that works fine.
5. When ignition is turned to ON (between AUX and START) I do NOT hear the fuel pump whine (notwithstanding 3) with either new or old relay connected. With listeners inside or outside the car. This sounds like a problem - isn't it supposed to do that for 3 seconds when the ignition is turned to ON? I used to hear it...
6. With new relay connected and fuel pump test lead connected car does not make any attempt to catch when the ignition is in START (so manually bypassing the relay to get the pump to pump fuel when the ignition is STARTing it still doesn't catch.) I did this after letting the fuel pump work for several seconds to prime the line and tried STARTing it 2-3 times for 5+ seconds each time. This is 2-3 times longer than it usually takes to start the car. Soon I will be jumping the battery...

What else can it be that - after not one starting problem in 2 years - caused one roughish start and then no start at all nada ever after? Plugged injectors (all of a sudden?) Bad computer? Where to start troubleshooting from here?

Thanks for any leads!

hello anyone knows where the fuel relay is at for a fuel injection 1986 chevy blazer ?

I’m having the same issue, specially pertaining to experiencing no issues, then one rough start and then no start really since (minus 2 times when it started but after 30 seconds shut off)