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Heavy smoke from the exhaust rich fuel mixture just changed full exhaust

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6ya6ya
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Posted on Jan 02, 2017

injectronic
  • 6 Answers

SOURCE: 1993 Hyundai Excel motor runs very rich fuel

sure he has an ecm installed .. its an injection based car.. probably air filter isn't that good .. also check if air intake pass is clear of any wastes

Posted on Jun 27, 2009

toneman2121
  • 775 Answers

SOURCE: Mazda B2600i

are there any fault codes present? i was looking at the fuel injection diagram on autozone.com and the only thing i can see that controls injector pulse width is the pcm. are all the injectors open for 15ms? you should also check fuel pressure. if you want to look at the diagram, go to autozone.com. register and enter you car. select repair guides, chassis electrical and the wiring diagrams

Posted on Mar 30, 2010

  • 12 Answers

SOURCE: rich fuel mixture at idle, smoke from exhaust,

change the O2 sensor/s and the mass airflow sensor

Posted on May 12, 2010

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2 Answers

Opel corsa 1.4i heavy on fuel and producing rich black smoke


You must have a fault code test run first, that is the start point on all modern systems of engine control.

Jul 07, 2016 | 2005 Opel Corsa 1.4

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Black smoke comes from exaust when I start. Could it overfuel and how can I fix it if its a new carb on my 88 2e 12valve


assuning there is nothing major wrong, get some forte injector and use it as recommended. I once had a renault laguna diesel fail an MOT test, a roadworthiness test that is, on emissions...it was absolutely chucking out black smoke but the engine ran well. I put 2 bottles of injector cleaner in the half full tank and went out for an eighty mile drive revving the engine in the lower gears. I returned to the testing station an hour and a half later and the engine was running perfectly.
Alternatively, assuming the engine runs well but is just a little smokey, have it terracleaned, this will remove most of the carbon deposits from the engine/exhaust and should increase the life of your engine simultaneously improving fuel economy

Oct 26, 2015 | Cars & Trucks

1 Answer

Why does engine run rich at times under acceleration?


not enough detail
to get an engine to accelerate , the air /fuel mixture is moved to rich in accordance with engine rpms
the more rpms the richer until the peak rpms are reached
( accelerator pump-power valve in carbies and ECM settings according to accelerator position
black exhaust smoke in diesels
so if you press the accelerator slowly then the air/fuel mixture is altered constantly in relation to the pedal setting
If you floor the pedal then it moves to rich and you get black exhaust smoke until the air mixture is again in balance

Oct 21, 2015 | Cars & Trucks

1 Answer

Black smoke from exhaust


Hi Paul,
I think you're right - it sounds like you're running to RICH (too much fuel / not enough air), but I would think that you'd see the check engine light on.
If you are too rich, there's probably an O2 sensor or other computer issue going on - and if allowed to persist, you'll probably end up with a clogged catalytic converter. As long as the sensor / computer is adjusting your air : fuel ratio, there little you can do to override it. I believe the computer will continue to adjust the mixture to get what it wants to see by the O2 sensor in the exhaust.
Bring it to a mechanic / dealer to get this fixed correctly - before you waste any more fuel or cause additional problems with the cat converter or other parts.

Good luck!

Jul 01, 2013 | Cars & Trucks

1 Answer

Exhaust pipe is blowing out a mist of black smoke


BLACK EXHAUST SMOKE IS A RICH FUEL MIXTURE.CAUSE BY WEAK SPARK IGNITION, FAULTY MAP SENSOR CHECK MAP SENSOR VACUUM HOSE AND ELECTRICAL CONNECTOR BECAUSE BAD MAP SENSOR WILL CAUSE RICH FUEL MIXTURE CHECK THE VACUUM LINE GOING TO FUEL PRESSURE REGULATOR, MAKE SURE FUEL PRESSURE REGULATOR GETTING VACUUM AT VACUUM LINE IF NOT LOOK FOR BROKEN OR DISCONNECTED VACUUM LINE TO FUEL PRESSURE REGULATOR, CHECK FUEL PRESSURE REGULATOR VACUUM LINE IF YOU SEE GASOLINE IN VACUUM DIAPHRAM TO FUEL PRESSURE REGULATOR REPLACE FUEL PRESSURE REGULATOR,CHECK THE EVAP CANISTER IF GAS SOAK IT WILL CAUSE RICH FUEL MIXTURE.

Aug 05, 2011 | 1995 Chevrolet Blazer

2 Answers

Black smoke and soot coming out of the exhaust pipe


Black smoke is caused when the mix of fuel and air becomes un-balanced. Normal mixture is 14.5 parts air to1 part fuel. When the fuel to air mixtures change because of a malfunction the mixture can go as high as 14.5 to 2 or 3, two to three times the proper amount. The black smoke is the excess fuel generated from the rich mixture and can be cause by one of the following:
  • plugged air filter
  • Shorted or stuck fuel injector
  • Failed fuel pressure regulator
  • Vacuum leak
  • Shorted ECM Sensor , scan for any problem codes if possible.

May 15, 2010 | 1992 Toyota Pickup

1 Answer

Rich fuel mixture at idle, smoke from exhaust,


change the O2 sensor/s and the mass airflow sensor

Oct 10, 2009 | 1991 Volkswagen Corrado

3 Answers

What would cause smoke to come out the exhaust pipe


WHITE SMOKE IS BLOWN HEAD GASKET. BLUE SMOKE ENGINE BURNING OIL.DUE TO WORN PISTON RINGS AND WORN VALVE GUIDES.BLACK SMOKE EXCESSIVE RICH MIXTURE.CLOGGED AIR FILTER. FUEL PUMP PRESSURE TOO HIGH.SEVERE MISFIRE.LOW ENGINE COMPRESSION.

Sep 28, 2009 | 1998 Chrysler Sebring

3 Answers

Black smoke from exhaust


hi nishga
im dave; hope i can help

First you need to determine if it is actually black smoke or if it is blue smoke. There are three colors of smoke that can come from the tailpipe. It is not white smoke obviously because that is easily differentiated from blue or black and generally indicates water or antifreeze leaking past the head gasket and into the compression area of the motor. White smoke is the steam of the water/antifreeze being emitted

Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles. The car has many seals, gaskets, and o-rings that are designed to keep the engine oil from entering the cylinder, and one of them has failed. If too much oil leaks into the cylinder and fouls the spark plugs, it will cause a misfire(engine miss) in that cylinder, and the spark plug will have to be replaced or cleaned of the oil. Using thicker weight engine oil or an oil additive designed to reduce oil leaks might help reduce the amount of oil leaking into the cylinder.

Black smoke is caused by excess fuel that has entered the cylinder area and cannot be completely burned. 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 heavy fuel odour in the engine compartment. Some of the causes of excess fuel are a carburetor that is out of adjustment which is not likely unless you have installed an aftermarket carburated system on your non-carburated car, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or emissions 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. Check the above mentioned systems and after detecting the trouble replace the faulty parts and then the engine oil and filter.

Jul 20, 2008 | 1996 Pontiac Firebird

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