PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (
-   Vintage Mercedes Forum (
-   -   280SE 3.5 Heavy Exhaust Smell at Idle Speed (

Jazzenco 07-09-2017 06:19 PM

280SE 3.5 Heavy Exhaust Smell at Idle Speed
Hi everybody,

I have some problem with fuel mixture I guess. Because my car exhaust smells like metal or unburned carbon too much that even when I get closer to exhaust my eyes burn or my clothes smells same. There is no black smoke but I could not solve the metter.

Car accelerates and runs good (no fuel delivery problem, because I do not feel any misfires even full load acceleration) I checked pressure regulator, it gives 2 bar to injectors.

Do you thing, ECU can be defective? It can give less amount of fuel to injectors or fuel given to combustion cambers inequally by injectors? I think lean mixture can cause like burned metal smell at exhaust?

Exhaust color looks like dark grey/black

Or some of my injectors are semi clogged or?? But this time car should work un steady or shaking?

I tried to adjust carbon from switch on ECU, but it also does not effect on this smell.

Also I have new spark plugs Bosch w7DC with 0.7mm electrode gap and my current ignition breaker gap is 0.4mm.

I wil be very happy if you have any suggestions?.

Thank you very much


optimusprime 12-31-2017 07:43 AM

I would try a bottle of injector cleaner . This will eventually clean the injectors .But that wont stop the over rich fuel to air mixture .. Do you have an option of other fuel outlets ? Might try another fuel with lower grade octain .

Dubyagee 12-31-2017 10:30 AM

Hows the air filter

Sent from my iPad using Tapatalk Pro

All times are GMT -4. The time now is 06:11 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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