Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 0
991 : 2011- 23
997 : 2004- 63
996 : 1997-2005 32
993 : 1993-1998 5
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 30
Cayman : 2005- 22
Cayenne : 2003- 6
Macan : 2014- 7
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
jm195
Newbie


Joined: 21 Sep 2019
Posts: 2



PostPosted: Sat Sep 21, 2019 10:28 pm    Post subject: Petrol/Fuel smell coming from exhaust 987.2 Cayman Reply with quote

Hi all,

Today I drove up North London about 25miles, all good no issues, on the way down however I noticed a lot of raw petrol/fuel smells coming from the car while sitting in traffic, windows open.

Having parked the car on my drive once I got home and trying to work out what it is, I have checked underneath for drips but nothing, I have an exhaust bypass pipe which was leaking some black oil near the weld, fuel cap was on tightly, but once I started up I could smell petrol quite strongly and it was coming from the exhaust. On first startup I also smelled burnt oil but not since.

Does this sound like anything serious or obvious as to what it could be? Does it sound like a fuel leak?/ is my car safe to at least drive to nearest garage?

After some reading it sounds like the car is running rich and maybe I've got a failed O2 sensor but nothing comes up on dashboard..

Appreciate any replies Smile
 
  
View user's profile Send private message
   
ShadesOfRed
Nürburgring


Joined: 26 Jan 2004
Posts: 492
Location: UK


PostPosted: Sun Sep 22, 2019 4:08 pm    Post subject: Re: Petrol/Fuel smell coming from exhaust 987.2 Cayman Reply with quote

jm195 wrote:
I have an exhaust bypass pipe which was leaking some black oil near the weld


That is probably a small leak in the exhaust and when the exhaust is cold water that has condensed in the metalwork is leaking out. The same water gets spat out of the tailpipe after a cold start. Nothing to worry about.

Not sure what to say about the petrol smell but worth getting codes read to see if the ECU thinks anything is amiss. When is the next MOT due - exhaust measurements could reveal all.
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7477
Location: Brighton


PostPosted: Sun Sep 22, 2019 7:07 pm    Post subject: Reply with quote

Agree ref the " oil " .

Petrol smell .. difficult .. to get it from the exhaust would indicate a pretty poorly running engine .. you will get an eml if its running that rich .

First check would be a fault code readout followed by a check of the fuel trim values with a tester.

A fuel leak ... well i've not seen it but it would drip onto the floor when stationary .

Im kinda thinking carbon canister area .. i know that's at the o/s/f wing but that's where i would be looking .

Rule of thumb ... with petrol then it's best to get it checked out by a garage .. it may be nothing .. but its a sensible approach to take .
_________________
.

My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
jm195
Newbie


Joined: 21 Sep 2019
Posts: 2



PostPosted: Sun Sep 22, 2019 7:39 pm    Post subject: Reply with quote

Started up today to see if smell was still there, apart from oily smell on cold startup which went away, didn't get the strong petrol fumes like yesterday.

I did notice my oil was quite low (bottom of the bars on oil check meter), so topped it up about 750ml. Wondering if possibly that has anything to do with it.. Car is due for MOT and oil change in late December.

Had codes read 2 weeks ago to diagnose some drive off assistance, unlucky if something happened since then, will make sometime this week to take it to a garage however to see...

Thanks for replies so far.
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7477
Location: Brighton


PostPosted: Sun Sep 22, 2019 7:45 pm    Post subject: Reply with quote

I can't really see the oil being 1 ltr down could cause this i'm afraid .

Temp does make a huge difference on parts though ... perhaps it needs to get hotter .

Drive off fault .. often it's the brake pedal switch thats gone faulty .. it's a double switch and one side activates slower than the other .. or not at all .
_________________
.

My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum