Exhaust Fumes

ALL OTHER MAKES ALL OTHER MODELS
Avatar
0WEN101
  • MEMBER
  • 3 POSTS
Hi, When I open a window or sunroof in my 94 citroen zx 2.0i petrol, exhaust fumes enter the cabin.

There is no leak in the exhaust. If I keep the windows up, no smell. Turning on blower doesnt cause fumes to enter either.

There seems to be an excess petrol smell from the exhaust when I nose around the rear of the car but nothing under the hood. All dry no obvious leaks.

Other symptoms which might be related are;

-can be hard to start sometimes.Doesnt matter if hot or cold. Turn it over and over and nothing.Turn it off then start again and it fires straight away.
-engine cuts out easily when starting from cold.
-the engine sometimes idles eratically
-sometimes cuts out when approaching a stop.Can start it again immediately
-fuel consumption seems higher than normal (than when I first got the car)

From reading other posts, the injectors or fuel pressure regulator might be an issue. What do you think?

thanks very much,
Mar 15, 2007 at 8:37 AM
Advertisement
Avatar
MERLIN2021
  • ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
I think you may need to replace the oxygen sensors...
Mar 26, 2007 at 9:54 AM
Avatar
0WEN101
  • MEMBER
  • 3 POSTS
Have one ordered, will reply back with the outcome.
Mar 26, 2007 at 6:44 PM
Avatar
0WEN101
  • MEMBER
  • 3 POSTS
As it turned out the smell was caused by a leaky fuel filter.

The other symptoms were cleared up by replacing the oxygen (lambda) sensor, map sensor, water temperature sensor, idle control valve (stepper motor) and cleaning throttle housing.
May 8, 2007 at 8:11 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.