Release fuel pressure

[siteunseen]

Is there an easier way than wrapping a towel around fuel filter line? Maybe some kind of valve somewhere?

Edited August 19, 2011 by siteunseen

[FastWoman]

I think the towel around whatever hose you intend to disconnect is about as easy as it could possibly get.

[5thhorsemann]

Unplug the fuel pump and crank the engine over. It is a good idea to disconnect the fp, or at least batt neg. when working in an EFI fuel system anyway.

[sblake01]

If you're talking about an EFI car, you can put 12 volts to the terminals on the cold start valve for 2-3 seconds and it will release the fuel pressure. I've actually done it with a 9 volt battery. This is what I use. 9 volt batery, momentary switch, an injector connector and some wire:

Edited August 19, 2011 by sblake01

[ll77]

I really like my fuel pressure reliever, it a very simple piece that is perfectly functional.

I took an old 12 volt wall outlet plug-in with 2 wires bound together, for something like an old radio, speakers, etc. and I cut off the outlet part and the connector, and I separated the 2 wires at only the ends, then I stripped the insulation off the 4 ends. Twist up the metal wires at each of the 4 ends and presto, I had jumper cables with tiny leads for the battery to the cold start valve.

Just remove the battery cables from the terminals and stick one end's wires between the cables and terminal posts (one wire, one terminal of course). Have the wire snug against the metal of the cable and terminal post, use the other end's leads to supply power to the cold start valve. Hold for about 15 secs, I do 20 for good measure, and you'll be able to feel that there is much more slack in the fuel lines. Pressure relieved. Then I open the gas tank cap to release the back pressure. Make sure you reconnect the cold start valve when youre done.

Make sure you DON'T TOUCH ANYTHING METAL W/ THE WIRE TO THE + TERMINAL, scary sparks will fly (I have first-hand experience). Mine had a white strip along one wire, that is the one I use for the positive terminal. You could use paint or white out to mark one wire so that you can tell them apart by the ends.

They're pretty long, so that you can take them anywhere in the engine bay and provide anything with 12V from the battery. I guess you can do this with any kind of old wire really, as long as you can make leads small enough to fit into places and not short the battery.

I notice my car starts right up with a higher idle right after, I guess because there is excess fuel in the manifold. Better than using a towel. Less messy, more professional (although I am by no means a professional). Good luck!

[sblake01]

To each his own however mine is much easier to make and to use........