Black smoke from exhaust pipe

MK.ALI

MEMBER
1994 OPEL OMEGA
2.0L
4 CYL
RWD
AUTOMATIC
500,000 MILES

Black smoke is appear from exhaust when I pressing to throttle (3000-4000) rpm. Engine is not works probably on idle (rpm is about 500).I replaced the intake filter but no change was happened. The fuel injectors eclectically works good when I am testing it. Whats your advice please? With my regards.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,913 POSTS

Two things come to mind as the first things I would look at. If you have a vacuum leak it will cause the system to run rich. Here is a guide to check for that:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Next I would check the fuel pressure regulator vacuum line to see if raw fuel is present. Here is a guide so you can see what I am talking about:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here is a guide for black smoke:

https://www.2carpros.com/articles/engine-black-smoke

Please let us know what you find.

Cheers, Ken