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Old 11-09-2012, 09:22 AM   #1
eph6jonprice
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Regulator Vacuum Hose MIA...

So I go to change my fuel filter last night and there was nothing but a leftover nub of a hose on the Regulator coming off the side. So first and foremost, there isn't even a dangling hose to attach the new one to, so WHERE THE HECK DOES IT GO? And curiosity if anyone knows, could this be the source of my epic battle with error code P1192? Thanks!
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Old 11-09-2012, 09:24 AM   #2
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That line goes to the f-connector at the upper intake boot. Look for a hard plastic line with soft vacuum line (about two inches) on either end of it. It should be dangling somewhere in the engine bay.

Should solve your code (i believe thats a fuel trim code but not certain) you have an unmetered intake leak.
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Old 11-09-2012, 10:44 AM   #3
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Originally Posted by E46Mango View Post
That line goes to the f-connector at the upper intake boot. Look for a hard plastic line with soft vacuum line (about two inches) on either end of it. It should be dangling somewhere in the engine bay.

Should solve your code (i believe thats a fuel trim code but not certain) you have an unmetered intake leak.
That would be basically the best news I've had on this car in a VERY long time! Is it the lower line on the f-connector (smaller hose)? It feels attached to something but I am going to get in there with a light and make some space and see... thanks very much!
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Old 11-09-2012, 10:50 AM   #4
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Yes, the smaller hose.
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Old 11-09-2012, 10:51 AM   #5
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^
Yes, it goes to the lower (smaller) nibble of the F-connector.
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Old 11-09-2012, 10:54 AM   #6
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Yes, the smaller hose.
Awesome... thanks everyone, I'll let you know if I find anything noteworthy, otherwise should be a pretty easy fix!
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Old 11-09-2012, 12:43 PM   #7
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Interesting new development!

Quote:
Originally Posted by E46Mango View Post
That line goes to the f-connector at the upper intake boot. Look for a hard plastic line with soft vacuum line (about two inches) on either end of it. It should be dangling somewhere in the engine bay.

Should solve your code (i believe thats a fuel trim code but not certain) you have an unmetered intake leak.
Well the plot thickens!

So here are pics of what I found:

The lower hose from the F-connector that should go to my fuel filter is actually connected to this cylinder that looks like it was definitely NOT a part of the original design, and was held in by what are now a bunch of broken zip ties. What you see in the pics are the shot from the top FROM the f-connector, and then from the bottom of the cylinder that the regulator vacuum hose is connected to, and then from the cylinder back up to the top and seemingly through the firewall???

It says "vacuum" on the actual cylinder although you probably can't see it, but the question is what the heck could this be for??? And of course should I just disconnect it and connect the fuel filter to the f-connector as seems to be the original design? Baffled by what the previous owner (or dealership I bought from, who DID prove to be shady people!) did here, and if disconnecting it is going to cause problems.

Any suggestions will as always be GREATLY appreciated, and can I "bump" this so that people will read it again who may have disregarded it by now? Thanks all!!!
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Old 11-09-2012, 01:48 PM   #8
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The line you are pointing at with the screw driver doesn't look like the size of the lower F-connector hose. That hose is just a few mm wide. The first pic I can tell that is it, but it looks like it changes material/size.

Hose should looke like this:



The elbow that the hose I think your referring to looks like number 6 in this photo, but I can't be certain. When I type in the part number real OEM gives me, it comes up as the F-connector, but that image doesn't look like the F connector...



The cylinder looks kind of like this, but that diagram doesn't show the part number because its not part of that grouping on realoem. I can't find it elsewhere, though I'm sure it's there somewhere.


Last edited by WDE46; 11-09-2012 at 02:05 PM.
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Old 11-09-2012, 01:57 PM   #9
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Originally Posted by WDE46 View Post
The line you are pointing at with the screw driver doesn't look like the size of the lower F-connector hose. That hose is just a few mm wide. The first pic I can tell that is it, but it looks like it changes material/size.

Hose should looke like this:

Yeah I know, strange right, but that is the line coming out of the cylinder that the original line from the f-connector goes to. And where it goes after going through the firewall is beyond me! Thinking about splitting the hose from the f-connector and running a line to the fuel filter and leaving this mystery cylinder connected? Thoughts?!?
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Old 11-09-2012, 02:06 PM   #10
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I keep editing my post keep checking it.
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Old 11-09-2012, 02:20 PM   #11
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Hmmm...I don't have a fpr on my filter, so I wonder if your car has a separate one also still? You should definitely leave that line intact.

You sure the nub you had left on your old one wasn't just broken off from one of the lines you reconnected already?

I don't know what code 1192 means off hand.
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Old 11-09-2012, 02:22 PM   #12
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I keep editing my post keep checking it.
You're awesome WDE! But I think that this is definitely some sort of aftermarket work around I'm dealing with since my understanding is that the small hose from the f-connector is supposed to go straight to the fuel filter, not to this free floating cylinder... any ideas? Here is a pic of the f-connector for reference...
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Old 11-09-2012, 02:22 PM   #13
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That cylinder is not a mystery cylinder. That cylinder is for your vacuum-controlled exhaust resonance flap. You can remove that cylinder if you wish and anything attached to it. However that "cylinder" has a vacuum line that runs from it to the intake manifold. Seems like someone got confused and routed the lines differently. Just feel under the manifold for any uncovered ports. Not sure exactly where it plugs into the manifold at.

The f connector should have the above pictured vacuum line running DIRECTLY from the upper intake boot TO the fuel pressure regulator at the fuel filter. The line clips to the oil dipstick I believe.
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Old 11-09-2012, 02:24 PM   #14
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So that's a post cat 02 sensor efficiency code.

Had you messed around with 02 sensors recently...and/or anything like headers?
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Old 11-09-2012, 02:24 PM   #15
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Hmmm...I don't have a fpr on my filter, so I wonder if your car has a separate one also still? You should definitely leave that line intact.

You sure the nub you had left on your old one wasn't just broken off from one of the lines you reconnected already?

I don't know what code 1192 means off hand.
Yeah, thanks dmax, I'll prob just end up trying to split the line since I'm assuming it was put there for some reason, whether good or bad... just wondering what the heck it is, and what else I might understand about what was done to this car before I got it!
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Old 11-09-2012, 02:25 PM   #16
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Hmmm...I don't have a fpr on my filter, so I wonder if your car has a separate one also still? You should definitely leave that line intact.

You sure the nub you had left on your old one wasn't just broken off from one of the lines you reconnected already?

I don't know what code 1192 means off hand.
All 325/330s AFAIK have the pressure regulator integrated with the fuel filter.
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Old 11-09-2012, 02:27 PM   #17
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Old 11-09-2012, 02:27 PM   #18
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Yeah, thanks dmax, I'll prob just end up trying to split the line since I'm assuming it was put there for some reason, whether good or bad... just wondering what the heck it is, and what else I might understand about what was done to this car before I got it!
No. Slow down. you're taking advice and coming up with your own solutions too quickly.
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Old 11-09-2012, 02:30 PM   #19
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That cylinder is not a mystery cylinder. That cylinder is for your vacuum-controlled exhaust resonance flap. You can remove that cylinder if you wish and anything attached to it. However that "cylinder" has a vacuum line that runs from it to the intake manifold. Seems like someone got confused and routed the lines differently. Just feel under the manifold for any uncovered ports. Not sure exactly where it plugs into the manifold at.

The f connector should have the above pictured vacuum line running DIRECTLY from the upper intake boot TO the fuel pressure regulator at the fuel filter. The line clips to the oil dipstick I believe.
Super helpful Mango, so in mechanics kindergarten terms (my current level), I should run a line directly from the f-connector to the fuel filter, and then feel around under the intake manifold for an empty spot to plug the cylinder (the hose CURRENTLY coming FROM the f-connector) into. Sound right? This issue has been driving me nuts, so THANKS AGAIN!
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Old 11-09-2012, 02:32 PM   #20
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No. Slow down. you're taking advice and coming up with your own solutions too quickly.
Also good advice
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