Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-25-2007, 03:00 AM
trueog's Avatar
All Star User
 
Join Date: Feb 2005
Location: Vancouver BC Canada
Posts: 400
Gas Smell/Exhaust smell through vents..

Sorry this is a little off topic Mercedes wise, but this is the only car forum I'm active with, so I can only ask you guys for help. So here I go....

I need a little help with my 1997 VW Jetta GLS 2.0L.
For the last couple months, when my wifes driving, inside the cabin area there's a strong exhaust smell that sometimes smells like gas. It seems to be coming in through the vents, and it switches between exhaust smell and a heavy gas smell. It doesn't seem to be leaking gasoline, as I've raised the car and checked. However its fuel consumption right now is out of this world, its horrible on gas and seems to be dumping raw fuel/ running very rich. I can't seem to figure out what the problem could possibly be. If you guys could give me any suggestions or idea's on what it might be it would make a world of a difference.

thanks

__________________
My Cars
Mercedes CLS
Mercedes C-Class W203 - All time favorite

R.I.P.
Mercedes C-Class - W202 Lemon
Mercedes ML - Warrior
VW Jetta Worst Car I ever owned - Alot of problems
Reply With Quote
  #2  
Old 01-25-2007, 06:13 AM
Registered User
 
Join Date: Aug 2002
Location: Southeastern PA
Posts: 3,035
It sounds like there is a major gas leak in the engine compartment. First start of the day closely inspect all the fuel line connections to see if any are wet ... it's easier to spot fuel leaks when the engine is cold ... once the engine compartment heats up any leaking fuel quickly evaporates.
__________________
Fred Hoelzle
Reply With Quote
  #3  
Old 01-25-2007, 12:49 PM
Registered User
 
Join Date: Sep 2004
Location: Seattle
Posts: 1,940
EXHAUST LEAK. Check where the down pipe connects to the manifold. Sometimes this is a "flexible" or "ball" type fitting. It can wear. Or something could be loose or...

As far as the gas smell, when the engine is cold the exhaust has gas in it, that is what the cat is there to clean up.

Mike
__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
Reply With Quote
  #4  
Old 01-25-2007, 03:07 PM
trueog's Avatar
All Star User
 
Join Date: Feb 2005
Location: Vancouver BC Canada
Posts: 400
Quote:
Originally Posted by Ferdman View Post
It sounds like there is a major gas leak in the engine compartment. First start of the day closely inspect all the fuel line connections to see if any are wet ... it's easier to spot fuel leaks when the engine is cold ... once the engine compartment heats up any leaking fuel quickly evaporates.
I've already tried finding a gas leak, and can't seem to see anything at all. But what you're saying makes alot of sense aswell regarding, it gets burned off when the engine gets hot...maybe that where the smell comes from...?

mpolli the smell usually comes in large amount at higher speeds(on the freeway), not right away.
__________________
My Cars
Mercedes CLS
Mercedes C-Class W203 - All time favorite

R.I.P.
Mercedes C-Class - W202 Lemon
Mercedes ML - Warrior
VW Jetta Worst Car I ever owned - Alot of problems
Reply With Quote
  #5  
Old 01-25-2007, 03:48 PM
Registered User
 
Join Date: Jan 2007
Posts: 154
Exhaust system or a leaky EGR perhaps?
Reply With Quote
  #6  
Old 01-25-2007, 07:37 PM
86560SEL's Avatar
Registered User
 
Join Date: Jan 2003
Location: east Tennessee (southeast USA)
Posts: 3,015
After you shut off the car, can you smell any gasoline in the engine bay?
Reply With Quote
  #7  
Old 01-27-2007, 01:50 AM
trueog's Avatar
All Star User
 
Join Date: Feb 2005
Location: Vancouver BC Canada
Posts: 400
Problem Solved!

Thanks for the input guys. The problem is solved.

I started off by changing OEM Cap/Rotor and Spark Plugs hoping to solve the burning rich problem, and it worked like a charm. Turns out one of my cables was shot, so i must have been running on 3cyc's and the computer was probably compensating for the power loss. This lead to excessive fuel consumption, it was pretty much dumping fuel like a 747 planning a crash landing.

While I was doing the spark plugs, I noticed my breather hose which looked fine from my viewing side, had actually eroded from the side facing the engine. It had a massive hole in it and i noticed oil residue against the engine. When I removed it, it was fragile and breaking with simple squeezing. I took the part to VW and they quickly found the part for me.

Cost: $125 for Bosch Spark Plug Cables
$35 for cap and rotor
$77 for oil breather hose thingy..lol.

all prices in CDN.

I had two mechanics(indies) tell me my engine was shot and no one noticed the problems of one cylinder not working and claimed head gasket as reason for oil smell entering through vents. The car runs like brand new right now and the smell is gone.

p.s. The only reason I did such a massive write up is to show people that you should always take a look your self before listening to a mechanic, i thought I was in for an engine overhaul.
__________________
My Cars
Mercedes CLS
Mercedes C-Class W203 - All time favorite

R.I.P.
Mercedes C-Class - W202 Lemon
Mercedes ML - Warrior
VW Jetta Worst Car I ever owned - Alot of problems
Reply With Quote
  #8  
Old 01-27-2007, 07:09 AM
Registered User
 
Join Date: Aug 2002
Location: Southeastern PA
Posts: 3,035
trueog, congratulations on diagnosing and fixing the gas smell issue. It's time to find another shop to work on your Jetta. The 2 shops that failed to diagnose the original problem border on completely incompetent.

__________________
Fred Hoelzle
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:09 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page