unreal_news

I need to test my fuel pressure. anyone know any generic pressure gauges I could pick up from a common auto store.

thanks,
-john

Sam Lin

Any fuel pressure gauge that goes 0-100psi will work, you just need a modified fuel rail end cap to screw it in to.

Sam

Cyrus951

Sam,

Can you give more info on the rail cap, what size is it?
Do we have to fab. one, or are they available somewhere?

SamGrant951

lindsey sells a kit that comes with a new cap pre threaded for their gauge, just unscrew old, screw on new. 50ish I think.

Skip

rail cap is 12x1.5. Most pressure gauges will plug in to a 1/8" NPT. Stewart Warner makes an adapter - #114854 - usually find them for less than $10. Otherwise, it's relatively safe to just use a fuel hose attached to the end of the rail (use a clamp).

For a fuel pressure gauge, I like my Actron kit (Sears and some others carry them - ~$60)

Good Luck!

unreal_news

thanks so much for that, i hope a valve isnt sticking. hopfully just a busted regulator or injector? neways, this helps a novice shadetree mechanic along a long road.

later,
-john

unreal_news

well, i went out and bought a actron from advanced auto parts for 40 bucks. interestingly enough, the end wont screw on to the rail, but only by a hair. anyways, I may just get ahold of another fuel rail cap, and drill and tap it to fit the gauge.
Skip - did your actron fit on your rail ok?

Cyrus951

Skip if you could post pics of the install, it would help a lot.

Thanks

Eyal 951

http://www.lindseyracing.com/Merchan...e=944FUELGAUGE
I have this as well.
~Eyal

83na944

Unreal_news,

Skip gave you a maufacturer and part number for an adapter that fits the rail and fuel pressure gauge. You may have to order the adapter.

Skip

Sorry, it appears I was unclear on my previous post. The adapater I mention from Stewart Warner (others make them too) will allow you to go directly from a M12x1.5 (rail end) to a 1/8" NPT. In the kit that I have (I think may be the deluxe kit - has a lot of adapters and hoses), there was a standard schrader valve that attaches to a 1/8" NPT fitting. Put them all together and now you have a test port end cap that will work with any fuel pressure gauge. I don't have access to the car right now to snap a picture, sorry.

Alternatively, you can use the stewart warner adapter to attach a mini fuel pressure gauge (like VDO) to the end cap directly. I do not recommend leaving the fp gauge attached long term. It's not good for the gauge and I think it presents a new point of failure for possible fuel leaks.

vanosman

Anyone sell metric to NPT ?
Female M12x1.5 to Female 1/8" NPT fuel hose or brake line
or use my metric blue adapter like the Warner and fit 1/8" male to 1/8" female

This is on Pauerman 951