EVAP line test

[flyromeo3]

So after changing my o2 sensor B1 S2 I cleared the CEL and all was fine.
The following day the CEL came on:

1 Fault Found: 17884 - EVAP Leak Detection Pump: Insufficient Vacuum P1476 - 35-00 - -

At times I do get this gasoline odor in my car and I assume its coming from the engine bay but, I can never get that hint of gas when i pop the hood open. Which leads me to think its the gasket in the fuel tank.

I also read on how you can progam your VAG to test certain functions in order to better isolate the problem.

All I can think of is that when i had my car on the lift I fished my hand up through the back of the egine to get the o2 harness up by the plug. could I of knocked loose a hose or cracked it?

The repair manual I have doesnt show me a diagram of the EVAP hoses in this system. Has anyone had this problem and fixed it? Lately, its been one of those things when I fix one thing something else pops up.

I'm at the point I feel like getting rid of the car but, I like her a lot
99.28. 30v.

[karmad]

i have same prob lmk if u get a fix

[flyromeo3]

im just getting home from work so im going to take a look and see if i may of knocked a hose loose or something. I'll also VAG it and see what i get again. watch it be a different CEL code this time!,......


not to mention, there was like a faint odor of fuel in my car that went away in about 20 seconds. Thinking it may be a valve or something opening up releasing the vapors. Since I had my heater thats probably why i smelled that. Which is why i think i knocked a hose loose around the o2 sensors area.

[flyromeo3]

*bump*

anyone have a diagram of the EVAP system for a 99 2.8 30v?

[Stumanbmx]

My EVAP system will throw a code every winter when it gets bitter cold. Just clear it and see if it comes back.

[flyromeo3]

^^ done that like 4 times. Comes back on a day later.

[Stumanbmx]

Nevermind then, sounds like you actually have a problem.

[flyromeo3]

lol.. I cleared it and im sure it'll come back on while im driving to PA tonight.
hopefully not

[flyromeo3]

bump

CLE back on

[flyromeo3]

Question. THe EVAP pump only pressurizes the fuel tank right? So the problem may be the Gas cap or the hose from the LDP to the fuel tank to test for pressure?

Also are there any tips or tricks on using VAG to narrow down where the leak may be?

[flyromeo3]

bump........anyone?

[flyromeo3]

:update:

based on the error code: 17884 - Insufficient Vacuum, I pretty much thought I had a leak in a hose or something. What drove me nuts is where is this pump getting vacuum from. So after weeks of searching and reading, basically it receives vacuum from intake manifold.
So this weekend I put the car on a lift. Inspected the lines under the car, by the gas tank, and behind engine. Still couldnt find a problem.
So, I removed my intake and plugged in a smoke detector and still no leak in the lines.
What I did discover, although Im aware of a broken vacuum hose is that smoke started to come out of that hose. Im thinking to myself, WTF is this hose.

So after gazing into my new bentley book, that hose is part of the "check valve" thats ontop of the back of the engine. One hose goes to some valve thats on the front of Bank 1. The other apparently goes to some vacuum reservoir thats in the front Right wheel liner? ( anyone know what that reservoir looks like? )

Since smoke was coming out of that hose during my troubleshooting, im suspecting thats why im getting that insufficient vacuum code. Odd but, am wondering if that could be the culprit.

Does anyone think or suspect that this hose would trigger that CEL for my EVAP?

ohh btw,...does a burning clutch smell like a dead mouse? Long story short, since my car is lowered I needed to put the front of some wooden blocks to get the lift under. while giving gas, the garage started to smell like something died in my engine.
I already found a friggin mouse in my engine ( dead of course ) just hope I dont have another one. Plus, the smell is around the front right wheel liner which I hope they didnt use to build a nest. they probably nibbled on some of the hoses so that I have to check.

imm have to buy a cat and leave it in my garage from now on =(

sorry for the long post

[flyromeo3]

*bump

[flyromeo3]

ok, since i guess i'll be talking to myself in this thread I'll add some updates to this.

So I looked at this link
http://forums.audiworld.com/a4/msgs/2528297.phtml

and the hose that im describing above as being broken connects to this blue bottle.
Hopefully today I'll repair it, reset the light and pray it doesnt return. Apparently, that line does serve a function to the LDP system.

[flyromeo3]

So this morning I replaced the LDP from a 99 passat. LDP's are identical, part number included. Only difference is the bracket they sit on. I had utilize the existing mounting bracket off my car and swap the LDP's around. I drove maybe 20-25 miles so far today and no CEL. I plugged my vag-com and checked the readiness and it shows Failed or Incomplete. I decided to check the fault codes since usually it'll show up there and not trigger the light yet. So upon checking No Fault Codes found.

If it works great. I can finally pass emissions.
If not, next step is to replace fuel pump relay.

[flyromeo3]

ok, so checked readiness today and it shows Passed.
No more CEL

EVap problem seems fixed.

will confirm in a couple days.