1971 2.2 S no fuel help

Gearbox · 05-02-2009, 10:34 AM

Attempted to start up the 71S for the spring and it wouldn't fire. Spark is fine and the fuel pump pressurizes nicely, but still no fuel to the injectors. I took off one of the lines to the injector and nothing was coming out with the ignition on, and with several cranks. MFI belt is in place and turns the pump, but no fuel to the injectors. Any ideas? Thanks Allan

herman maire · 05-02-2009, 01:12 PM

If you have good fuel pressure/spark and know that the timing is good just keep cranking in 20second intervals . My 73 put up quite a fight when I parked it over the winter.... I just kept cranking and it slowly started to sputter to life.

Was this a running car when you parked it? your injectors are probably leaky.

RSTarga · 05-02-2009, 02:04 PM

check the filter at the tank. how old is the fuel?

Gearbox · 05-02-2009, 02:33 PM

Thanks for the replies:

Herman, When I started this ordeal, I cranked for about 30 mins untill the cold start injectors started a minor fire. The car normally would crank right over after a few cranks no matter how long it was sitting. I'm stumped. Would sitting cause the MFI pump to get stuck? Check valve?

RSTarga, Fuel is about 5 months old and comes out clean and fast from the filter.

As I recall, when I put it away last year, I noticed that the car suddenly lost power. It would start right away, but soon as you applied throttle, it would pretty much die out. I was able to nurse it back home, and never got around to checking it. Sound familar to anyone?

I'm thinking either the fuel pump isn't providing enough pressure (and I don't have a guage) or something in the MFI is stuck. Any suggestions? Thanks Allan

ossiblue · 05-02-2009, 04:27 PM

Not an MFI expert but from reading other posts, the symptoms you describe, " I noticed that the car suddenly lost power. It would start right away, but soon as you applied throttle, it would pretty much die out. I was able to nurse it back home..." do sound like a failing fuel pump or at least fuel starvation for some reason. Try checking the pressure on the fuel pump as a first order of business.

Gearbox · 05-02-2009, 07:55 PM

Thanks, I'm leaning towards that possibilitry as well. I'll pick up a fuel pressure guage tomorrow. Any idea what the optimal pressure should be? Thanks Allan

Bobboloo · Bobboloo's Garage

I don't think pressure from the fuel pump to the injection pump is all that critical. The injection pump mainly just needs enough supply from the fuel pump.

Supply rate is 900-1000 cc per 30 secs.

If your getting enough supply to the injection pump but nothing to the injectors then the injection pump would seem suspect.

P.S. I believe a pressure test of the supply to the injection pump just determines if the fuel filter is suspect.