1971 prime fuel pump after sitting?

gbhumphrey · gbhumphrey's Garage

My 1971 911e been siting for 8 months, It cranks but doesnt seem to get fuel. If the fuel has drained / evaporated out, do I beed ti prime the fuel pump? If so , how? Or do I just need to keep cranking for a couple minutes?

PNW Targa · PNW Targa's Garage

I'm looking forward to seeing other responses to your question. My '71 needs a lot of cranking before the engine starts to catch and eventually turns over. I have a carb rebuild and ignition upgrade planned to see if either helps, but in the meantime, I'm often surprised at how long I have to crank the engine before it fires. I've never tried priming the system (aside from pumping the throttle and using the throttle lever) in any way.

rowingone · rowingone's Garage

Two things you can try . . easiest is to spray some starter fluid in the carb and once it turns over a bit it will draw the fuel up or disconnect the fuel hose and place in a jar and turn the car over until you see fuel.

gbhumphrey · gbhumphrey's Garage

it's an "e", einspunzenpupen (or however you spell it) , trans to "mechanical fuel injection, so, no carb.
BUT, I was going to try "disconnect the fuel hose and place in a jar and turn the car over until you see fuel."
That helps!

rowingone · rowingone's Garage

You can use starter fluid on a MFI car too, just remove the air filter and spray in throttle bodies. Since you have MFI are you sure your cold start injection is functional?

gbhumphrey · gbhumphrey's Garage

The cold start was replaced with a little button ti squirt fuel instead. And Im pretty sure thats working. Per your suggestion next step is disconnect fuel line and see iif its pumping out .

ErrorMargin · ErrorMargin's Garage

Quote:

Originally Posted by gbhumphrey

My 1971 911e been siting for 8 months, It cranks but doesnt seem to get fuel. If the fuel has drained / evaporated out, do I beed ti prime the fuel pump? If so , how? Or do I just need to keep cranking for a couple minutes?

I'm not sure if this will work on your 71, but on my 84 I was able to put a jumper on the fuse block to run the fuel pump without cranking the engine.

I used this both as an easy way to drain the tank, and a way to have fuel flowing through the system to check for leaks after I replaced all of the fuel lines and reinstalled my engine.

https://www.youtube.com/watch?v=ddwIAihBgco