Fuel Gauge on FPR Drops 5lbs when Vac Off
Hello All,
I put a new fuel pressure gauge on the the fuel pressure regulator. There was a little plug on the FPR, that is where I put the gauge. I was very careful not to get any thread sealant on the end of the gauge threads so as not to plug up the little hole.
At idle w/ the vac hose on it read 29 lbs. When I shut the car off, remove the vac line off the FPR and plug the vac line, then start the car, the fuel pressure gauge reads 24 lbs. http://forums.corral.net/forums/images/smilies/eek2.gif
I thought when the vac line is removed and plugged the pressure should go up.
I turned the adj. screw two full turns clockwise and the pressure stayed the same.
No fuel coming out the vac line nipple.
I ran the car and my wide band O2 went from around 17 at wot to around 15. Right direction.
So back at the house I turned the adj. screw one more full turn clockwise. Took the car out and 200' down the road my fuel line fitting at the fuel rail tube popped off and shot fuel everywhere. The car shut down. The fuel line is an aluminum Russell O spring type that fits over the factory style flared tube. The round spring was pretty loose inside the fitting, not tight.
I couldn't push the fitting back on by hand so I used a socket and hammer and tapped it back on the tube. I adjusted the FPR screw counter clockwise three full turns back to where it was when I started. It started with no leak at fuel connection. I slowly got is back in the garage.
Does anyone have any ideas why the fuel gauge didn't go up instead of down when the vac line was removed?
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Could I have basically closed the valve in the FPR to have popped the fuel line fitting?
The whole reason for the gauge and FPR adjustment is to get my wide band o2 #s lower to around 11 at wot.
Thanks for any ideas.