Could a pressure gauge cause air intrusion?

[ghunt]

Question...I bought a liquid filled 15 psi pressure gauge and installed it yesterday. I had to bleed the system after installing it (of course), and got the truck running (and noticed I had 2 psi of pressure at idle, but I guess that's a different story). Anyway, I drove the truck over to my girlfriend's place and spent the night there.

I went out this morning to go to work, started the truck, it fired up, stumbled and shut off. I hit the schrader valve on the filter head and a bunch of air came out along with a little fuel. I cranked and bled the damn thing for 10 minutes and it still wouldn't start (or I would get it to start briefly and it would shut off again). I finally had to crack one of the injector lines and FINALLY got the damn thing to start.

I don't know if it'll do that crap again when I go to leave tonight, I sure hope not, but I don't understand why it even did that...I saw no evidence of leaks anywhere around where I had moved things around to install the gauge plus I put new sealant on anything that I disturbed during that install. ***?

 

[plywood]

Yeah, Ok, but did your girlfriend put out?

 

[plywood]

On the serious side, it seems like once you've got some air in the system it almost hides until you shut off the truck and then maybe a bunch of small bubbles rise to from a big bubble. I don't know, just something I've noticed with mine. Maybe give it one more chance.

 

[icanfixall]

Where did you install the pressure gauge... About the only place you can see the fuel pressure after the filter and before it reaches the injection pump is at the sender that tells you the filter is plugged up... Thats the vacuum switch near the line from the filter to the injection pump. Why you still have an air leak is tuff to explain from here. Try tightening up the lines from the lift pump to the filter at the filter and both ends of the line from the filter to the injection pump... All three of these connections have a rubber seal in them. The line to the pump is 5/16 and the line from the lift pump to the filter is 3/8. Any good injection pump repair shop will have these seals... They are called olives... Don't know why either...

 

[plywood]

It's a sliced black olive?

 

[towcat]

It's a sliced black olive?

you think you're on a roll today dont'cha?

 

[icanfixall]

It's a sliced black olive?

 

[plywood]

I never though much of it considering all the arbitrary names for things til one day a member here or there told a guy to slice a piece of fuel line if in a pinch, and the duh light came on.

 

[ghunt]

Well...I went to leave work last night and it did the same thing to me again (started immediately, stumbled and shut off...then crank, crank, crank). Something was messed up with how I had that gauge in there apparently, I really don't know. I took it out and put everything back together sans that, and it seems fine, didn't give me any problems this morning.

Also I had the pressure gauge plumbed into the inlet on the filter head.

I can't really see what the problem was...because I'd actually already had all the fittings the gauge was mounted to (including the tee- just had a plug in it) in the system...I took everything apart when I added the gauge and used new thread sealant. It's a bit confusing.

By the way- what's the actual name of the "olive" seals? When I search olive seals I can't find anything, I know someone had a link to something on mcmaster-carr awhile back.