Vacuum line

Hi,

Just looking at it, it's hard to tell. Do me a favor. First, start the engine and place your finger over the end of the connector to determine if there is vacuum present.

Next, at idle, have you noticed any vibrations or a rough idle?

I attached a pic below showing the vacuum hoses I suspect it could be related to. I highlighted them. If possible, take a pic further away from the engine so I can see more. Also, see if you can follow that hose to determine where the opposite end is.

Let me know.

Take care,

Joe

Hi, just to jump in. Start your vehicle up and turn the A/C on. Can you adjust the direction of the airflow? If it is blowing on defrost then that hose needs to attach to the intake manifold. If the air flow corresponds to the vent settings, then check to see if the EGR valve is missing the hose. Let us know.

The A/C hasn’t worked since I was like ten. I’m 27 now, lol. Someone said it was a leaking line or something. I know the blend door motor, or something is out because it just clicks when it’s turned on. And here’s the pic.

If the vacuum line is for the HVAC unit, as long as the fan motor comes on you should still be able to change. The direction of the airflow if it is vacuum operated. If it is stuck at defrost when you try selecting a different setting, then that hose is for the HVAC unit. Let us know if the air flow is stuck in defrost, please.

It is not stuck in defrost.

Hi,

Is this the engine you overhauled? Also, is there a vacuum to the hose in question? I'm trying to determine if it goes to the intake or a component.

Let me know.

Take care,

Joe

Yeah, it’s the same engine. And it’s connected to other ones that go to the HVAC the evap canister the EGR and something else that I can’t remember right now. They’re all connected into a big one that goes to the intake and the little one I Can’t figure out directly behind the big one in the intake. All the colored ones in the photo are the ones that connect to the one I’m talking about.

Hi,

I just spent an hour with no success trying to find a vacuum schematic indicating colors. My manuals don't have one.

When I look in the manuals, the only colors indicated for engine vacuum are related to the HVAC system and you are not having trouble with that system. So, that leads me to think it is either the EGR valve or the vacuum regulator solenoid.

If you look at the attached pic, it shows the items I'm referring to. Let me know if either is disconnected.

Take care and good to hear from you again.

Joe

Quick question. When you start the vehicle up, is there vacuum at that hose when at idle or not? That should help simplify things.

All of those are already connected and yes there is suction from the hose in question. I put a bolt in it, and it seems to have made the idle less rough, but I’m not sure how long I should keep it like that. And thank you, Joe. Likewise. I am not sure if the bolt effects anything because after the rebuild I only got to drive it for 3 days until my trans cooler lines went started leaking. I replaced both of those and the cooler itself but had to call for a jump because I didn’t disconnect my battery when I was working on the cooler, so it drained. The technician put the negative on the positive and positive on the negative which resulted in a huge spark and a damaged computer. So once again, my car is not working but for those 3 days the bolt in the vacuum hose seemed to work.

And when I was referring to the colored lines in the picture, I was talking about the picture I took but it doesn’t seem to have been uploaded. Let me try again.

Hi,

I certainly see it. The only thing indicated as a yellow hose is for the HVAC. Since you have no issues with the HVAC, there is a chance a different vacuum supply was attached in place of this one.

The idea you put a bolt in it is perfectly fine. You basically stopped a vacuum leak. We just need to identify where it goes.

1) Fuel pulse dampener (Between fuel rails).

2) EGR valve.

3) EGR vacuum regulator (firewall).

The three things mentioned above are components that require an engine vacuum to operate. I tried to get the best pics I could find for you to identify the parts. Also, the last pic shows a schematic that identifies each hose in the pic. Check these things and let me know what you find.

Take care,

Joe

See pics below.

All of those are already connected.

Hi,

Wow. You got me stumped on this one. I have looked through everything. Now that you have the bolt preventing a vacuum leak, are there any noticeable issues? For example, is a rough idle, something that doesn't work, any fuel smells, or anything out of the ordinary?

The last pic I attached above and labeled is a vacuum schematic from Ford. LOL That doesn't mean something isn't missing, but it matches the ones from my manual.

Just to reconfirm. With the bolt out of the end, you have a vacuum supply to it, correct? Also, the opposite end goes to the intake manifold, correct?

I'm really trying here. LOL You have done a lot of work on this, and we need to get it perfect.

Let me know.

Joe

Thank you, I really appreciate it. And yes, there is vacuum and no there was a rough idle until I plugged it. Here is my attempt at drawing how everything is plugged in, lol. they all connect to the big one that goes into the intake.

Also, here is the schematic from under my hood.

Hi,

Your drawing is perfect. I went through things again. Looking at your pic, the only thing not connected is the canister purge valve. You have the regulator, EGR, and EVAP service port connected. The only thing left is the purge valve.

Look at the pic below and let me know.

Joe

That’s what the red one on the bottom right of my drawing is connected to.

You have me stumped. The schematics all show three lines off the supply tree. I am going to ask a different tech for his opinion.

Ariana, I looked at the pics you attached above. I copied, circled, and reattached two below. What am I seeing in pic 1 that has a yellow vacuum hose going to it? EGR? Also, in pic 2, where is that physically located (shows the screw in the hose)?

Let me know.

Joe

Second pic is when I pulled it off intake and third pic is when I pulled the orange one that I plugged with a screw out of the big one that goes into the intake. The big one is what all the colored ones end up connecting into.

Based on how short it is, it must be something really close to where it is located. Do me a favor. I attached the directions below for the removal of the intake manifold. It explains all the vacuum hoses involved. See if you see anything that you may have missed.

Let me know.

Joe

See pics below.

Yeah, that’s why I’m confused because it is so short so the only place for it to go is the firewall because it is connected to the back of the one that goes into the intake, but there is nothing for it to go to on the firewall. I don’t see it in any of those pictures either and I have everything plugged in from what I can see in those photos.

It attaches to the back of the one that goes where the white circle is.

Hi,

That is the main supply port. I just listed a question regarding this. I am hoping someone has a solution. Hang in there. If it is running well and there are no issues, it will be fine.

Stay in touch if you don't hear back from me right away. If I get a reply, I will let you know.

Joe

Okay, thanks.

Ariana,

I didn't want you to think I forgot about you. I am still hoping for info on the vacuum issues. If the vehicle is running okay, keep driving it. Funny, I just now remember you having another thread started for different issues. I have to check that out to see if you replied.

Regardless, take care and know I didn't forget.

Joe

Thank you very much. I appreciate it. But yeah, It’s not running at all because of whatever the AAA guy did to my car when he switched the cables. I’m still in the middle of that. Trying to figure out how to pay for an electrical diagnosis to even get the repair estimate so they can take me seriously. They denied my claim, but I worked way too hard on this car and if it’s my fault then okay but if it’s not then I will not let them do that to me. Plus, with all the time you guys have spent helping me, you’ve also put in too much work into this car for them to mess it up in two seconds! Lol