Question about 1995 Volvo 940

1 Answer

Hello , I've a Volvo 940 1995 with a b200ft engine. Recently I've noticed that black smoke comes from exhaust & a very poor mileage about 9 miles per gallon, engine rough at idle but clears up on acceleration and lambda light on . is this comes form a bad injectors , mass air flow or what? please help Thanks,

Posted by yk_5 on

Ad

1 Answer

nvannoy

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 234 Answers

Black smoke points to unburnt fuel. I would start by replacing the spark plugs and wires if you have not done so in the last couple of years.

Posted on Jan 21, 2010

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

2001 dodge caravan. Changed engine. Ran a few


defective catalytic convertor. It may be plugged up.Make sure ALL the exhaust line from intake manifold(at engine block) to final exhaust pipe are not clogged up.You have reverse exhaust pressure going back towards engine manifold.

Oct 21, 2014 | 2001 Dodge Caravan

1 Answer

Black smoke and bad fuel consumption what is the problem? Oh it an 07is volvo s40 20d


Hi there:Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.
How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using FixYa.

Mar 04, 2012 | 2007 Volvo S40 2.4i Sedan

1 Answer

Why do i get black smoke when i boot it hard out of the exhaust


Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor. Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil.

Aug 17, 2009 | 2005 Jaguar X-Type

4 Answers

My Corvette smokes a black sooty exhaust about half the time. I've driven it about 3000 miles in last 4 years. What is the problem and how can I repair?


Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor. Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil.

Aug 13, 2009 | 1981 Chevrolet Corvette

1 Answer

Smoke from exhaust


you put 2 many oil in the engine

Jun 01, 2009 | 2003 Saab 9-3

1 Answer

2000 Volvo V70 2.5 TDI excessive black exhaust smoke


black smoke( too much gas)
blue smoke( burning too much oil)
white smoke( burning coolant)

Apr 20, 2009 | 1998 Volvo V70

1 Answer

2001 Mercedes E220 CDI exhaust black smoke on acceleration


hello,according to service information;smoke formation or si 07.16-p-0004a (service inform) from mb ,your engine have normal function,if you want ,ask your dealer about the service inform with number 07.16-p-0004a,you can read the explanation regarding your problem,ty

Mar 14, 2009 | 2001 Mercedes-Benz E-Class

1 Answer

Smoking


Are you loosing coolant? If you are, you may have a leaking head gasket. Coolant will leak into the cylinder and is turned to steam as the engine is running and comes out the exhaust as steam.

Jun 19, 2008 | 2002 Dodge Durango

Not finding what you are looking for?
1995 Volvo 940 Logo

486 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Volvo Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...