No fuel/fail to start

Asked by Johnathan Jun 10, 2019 at 04:29 PM about the 1985 Mercury Cougar Coupe RWD

Question type: Maintenance & Repair

Bought an 85 Cougar, test drove and it ran fine.
Now it's failing to start. It will run if fuel is poured
into the 4th throttle body. The fuel pump works
when the relay is jumped but still won't run.
Disconnecting the line from the throttle body and
jumping the relay produces fuel so I know the line
isn't plugged. I've replaced the fuel pump relay, eec,
and fuel filter so far. Tried a new ignition switch as
well. Any suggestions?

2 Answers
38,925

beatupchevy answered 4 years ago

get some test equipment to eliminate guess work , (guess work's bad Mkay) , fuel pressure gauge , multi meter , to see if there's power and ground at the fuel pump disconnect and fuel pressure , is the injector(s) firing ? Maybe some crap in the fuel tank/line

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Johnathan answered 4 years ago

Without jumping the fuel pump relay there is 0 pressure, the pump doesn't even kick on. multimeter reads 12 volts at the large terminals and 3 at the smaller on the fuel pump and ignition relays. Multimeter also reads 3 at the injectors.

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