I need to add a fule pressure gauge onto my 03 ecotec fuel rail. The gauge says it has a 1/8 npt connection on the back. What is the exact size of the tap im going to need?!
thank you in advance.
If you use a 1/8" NPT to 1/8" NPT nipple, you'll need a 1/8" tap
EDIT: Bah, trust me to take too long to respond...
Edited 1 time(s). Last edited Monday, July 17, 2006 10:32 AM
wow , john knows how to give US measurements , LOL j/k
but yeah what shifted said , home depot , lowes , ace hardware , sears
will all have that tap size , and look at the tap it will tell you the drill size you need also
make sure you flush and blow all the shavings out of the rail , and make sure you dont have any leaks
I don't know why GM even bothers using metric... no stores (even in Canada!) carry a large selection of metric hardware... so it's damn near impossible to find the right replacement hardware when you break hardware (heh heh.. bust a nut...)
Only thing we've got that's good.... the Robertson head screw.... way better than that Torx garbage
if you dont want to tap the fuel rail then you can use the -4 fitting on the fuel feed line.... you would need to convert the -4 to 1/8npt ....
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the braided line on the fuel rail runs to a mechanical fuel pressure gauge.... just a thought... good luck.
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John Lenko wrote:I don't know why GM even bothers using metric... no stores (even in Canada!) carry a large selection of metric hardware... so it's damn near impossible to find the right replacement hardware when you break hardware (heh heh.. bust a nut...)
Only thing we've got that's good.... the Robertson head screw.... way better than that Torx garbage
yeah i agree the torx suck , but atleast they do share some size with alen's , so if you strip the torx part you still got a chance to get it off
Another pic from the N20 FAQ section
he knows that pressure tap is there
Yea, I figured as much, but if someone else may stop by and read this and not really sure with the first pic is, the second link will help them.
If that is the wrong way to do busniess here. Well then.....
yeah true
us 2.4 people have to do the drill and tap , GM didnt give us a test port
so i just go out and buy a 4an stainless hose, how do i hook that onto the 1/8 NPT sender i have for my electronic fuel pressure guage
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
^^^ Yea just an adapter is needed.
Yea GM did screw you guys out of that test port.
