5.0 Idle issues

[gadget73]

not gonna seal without an O ring in there.

You really don't want the type of adapters that don't have cores. The coreless ones use the old R12 core and have a pushrod, but the rods are crappy and will bend, leaving the valve hanging open to leak. Those are usually the aluminum ones, the decent ones are steel.

[monotonorobo]

not gonna seal without an O ring in there.

You really don't want the type of adapters that don't have cores. The coreless ones use the old R12 core and have a pushrod, but the rods are crappy and will bend, leaving the valve hanging open to leak. Those are usually the aluminum ones, the decent ones are steel.

I’ll have to look around and see if I can find some then. The low side port came with a core installed but the high side didn’t. The valve core that was previously in the system was bent just like you said. I’ll try the advance auto retro fit ones. Or if you could tell me which brand you used for your retrofit.

[gadget73]

No idea what they are, I got them at the counter at Napa, they had them in a bin behind the counter. Some Ford high side fittings are smaller size than than GM ones, so make sure you get the right size. Offhand I want to say its 3/16 SAE vs 1/4 SAE. The low side are 1/4.

[monotonorobo]

Went out and bought a different brand and this is a pic of what I was talking about. I didn’t tighten it any more than this but you can see the o ring starting to stick up. These adapters for the high side didn’t come with a valve core in it but you can install one in it. I’m thinking maybe it’s the port because it ripped up the o rings in 3 other ports I had.

[monotonorobo]

picture didn’t go through

[sly]

Seems the host is getting quite overloaded today. posting is taking a long time. Hopefully that will clear up soon.

[monotonorobo]

Let me try again.

[sly]

Nope... we have a ticket open with the host, but it's not fixed yet.

[monotonorobo]

Alright I think I’m doing something wrong. I resolved the issue with the adapters and I hooked everything up today. I used an air compressor and one of those red harbor freight vacuum pumps that connects to a compressor. When I went to go pull vacuum I kept getting 0 psi unless I disconnected the air compressor from the pump and let the compressor build up for a bit. After I let it build up it would vacuum down to 10 inches of Mercury immediately after connecting the two again. The pressure would then leave within a minute and sit at the 0. Checked my connections and everything seemed fine but don’t know what I did wrong. I’ll send a video in a bit.

[monotonorobo]

https://youtube.com/shorts/DLztDf8kglE?si=iUKKjhOxY48w9BO-

[Tiggie]

You need an electric vacuum pump. I don't think the air compressor ones will pull enough vacuum without a lot of air volume for a long period of time.

Here's the one I bought. https://www.amazon.com/Kozyvacu-TA35...Y2hfYXRm&psc=1

[sly]

yeah... the air bypass vacuum only gets about 22 to 23 inHg vacuum with good 90 psi supply and you need to get about 27-28 to be sure. The single stage one from HF (the cheapest one) will get that far in about 10 minutes. Though, if you are pulling 10 and close valves and the vacuum bleeds off that fast, you've got some severe leak somewhere.

[gadget73]

+1 about the vac pump. Also if your air compressor just doesn't have enough volume it won't make any vacuum.

[friskyfrankie]

If you think you may have future need for a vacuum pump, I'd get a decent two stage and not fool around with one that requires an air compressor.

[gadget73]

The purpose of the vacuum is to boil off any moisture in the system. 28 inches boils somewhere in the mid 90 degree range, 29 inches is 76 degrees. The lower the vacuum, the hotter it has to be and realistically anything less than 28 inches just isn't gonna get it done.