andyfreelandy

Well-Known Member

• Sep 5, 2022

• #1

It is odd TD4 fault week this week !

Had a vehicle that fumed rich diesel smell from exhaust. Cleaned inlet manifold, egr, pcv and replaced filter.
Problem solved, MOT smoke test passed. Vehicle had a set of recon injectors a year ago according to paperwork.
2 weeks later it is producing smelly fumes again. Defo from exhaust as closing all windows stops the smell coming I to the car.
Any ideas ??

Thanks again.

 

Alteredtech

Well-Known Member

• Sep 5, 2022

• #2

No smell comes from the ventilation ?
Each time I experienced a diesel smell, it was a leak in the fuel line, since I have an extinguisher in my car …

 

Last edited: Sep 5, 2022

andyfreelandy

Well-Known Member

• Sep 5, 2022

• #3

Thanks, no it's defo strong exhaust smell. Like over rich. No smoke though.
Weird one this.

 

Nodge68

Well-Known Member

• Sep 5, 2022

• #4

andyfreelandy said:

Thanks, no it's defo strong exhaust smell. Like over rich. No smoke though.
Weird one this.

Click to expand...

Is there any black smoke?

 

andyfreelandy

Well-Known Member

• Sep 5, 2022

• #5

No smoke at all. Passed mot last week.
Smell cleared after a good service, lasted a week or so then its back!

Wondered if the cat had died ? So to speak !!

 

tyregeezer

Well-Known Member

• Sep 5, 2022

• #6

Hi the only time have smelled foul diesel (no smoke is when its old it stinks) but if it cleared maybe not are you filling at same source TY

 

kernowsvenski

Well-Known Member

• Sep 5, 2022

• #7

Mine does it on the first start of the day. A small puff of grey smoke and the whiff of rich fumes for a few seconds, sometimes with an unstable idle for five or six seconds. It then clears. It's done it for yonks. I changed the glow plugs a while ago thinking that would cure it but it doesn't seem to have made much difference. My next step is to clean out the PCV and a new air filter. I have the cyclone fitted but have not touched it since it's been on the car (a long time).

 

andyfreelandy

Well-Known Member

• Sep 5, 2022

• #8

Thanks. This one does it all the time! Cleaning pcv and manifold appeared to cure it for a while. Easy to forget the pcv valve when cyclone fitted and they do stick.
Anyone had a failed cat? Does that make a smell?
Trying diesel cleaner next as that is easy !

 

J

Jayridium

Well-Known Member

• Sep 6, 2022

• #9

andyfreelandy said:

Wondered if the cat had died ? So to speak !!

Click to expand...

 

T

TommyQ

New Member

• Nov 16, 2023

• #10

Hi, did you get to the bottom of this ? Mine doing the same since around a new exhaust going on. As you say smells of really rich exhaust - no smoke, not white puff start up smell

 

andyfreelandy

Well-Known Member

• Nov 16, 2023

• #11

Never found it. Cleared itself after a while !
Maybe you have an exhaust leak?
Don't know if you are supposed to do this but I usually hold a wad of rag momentarily over the exhaust exit pipe and listen / look underneath at the joints.