Explorer Swap Question 2: Fuel Line Test

[John Griswold]

Getting close to starting the new Explorer swap. I was wondering if before I put on the upper manifold would it be possible to cycle the fuel pump and pressure test all the fuel line fittings and injector seals. EFI Gary says the pump will run for 2 seconds each time the key is turned on without starting the engine. The line could be vented through the Schrader valve. Can this be done? Should this be done? I also have the Fuel pressure gauge to go on the Schrader valve.
Thanks

 

[DirtDonk]

I don't see any issue with that. Testing is a good thing even if putting the upper on and taking it off isn't that big a deal when it's new. Once it's been on awhile though, it can stick a bit and besides, once you get it running you hate to take anything apart!

But there is nothing for the upper to do until the engine is running. The vacuum items don't care, and there are no sensors in the upper that I remember (some uppers had the ACT there, but I think the Explorer's is elsewhere or non-existant?

So no, fire away!
Isn't there a pin or three you can activate to keep the pump running while you check things too? Thee OBD-I setups had that test connector which came in real handy, but I don't remember the Explorer OBD-II having anything like that.
Luckily just cycling the key a few times should pressurize the whole system and if it's tightly sealed and the pressure regulator is working, you should not get much bleed-down over a short period.

Paul

 

[sanndmann3]

If I remember correctly, I popped the plastic cover off one of the relays and held the contact points closed, activating the fuel pump. The cover did not come off easily so it was scrapped out and replaced after the test.

 

[John Griswold]

So it sounds like I should be able to pressurize the system and check it. Guess I'll try the 2 second cycles before I try and identify the relay but that would be a good idea. Thanks for your help!

 

[hankjr]

when i first cranked, the two second pulses did not get me to the pressure that started causing leaks. i didnt see them until the pump ran a while. i would suggest powering longer if you are going to go to the trouble of a test/bleeding, i would run the pump longer.

Hank

 

[garberz]

So it sounds like I should be able to pressurize the system and check it. Guess I'll try the 2 second cycles before I try and identify the relay but that would be a good idea. Thanks for your help!

To run the fuel pump continuously. Pull the pump relay, jumper the socket, pin#30 and #87 together. #30 is the fused 12v. and #87 goes to the pump.

Mark