Question about Cars & Trucks

1 Answer

What cause the engine to run rich and black smoke coming from tail pipe?

1989 nissian D21 the engine have 8 spark plugs when i start the engine black moke come out the tail pipe and the engine is running rich i replace new spark plugs and ingition wires but the fire is red what is causing this? can you send me a firing order on this engine? when i disconnect the wires from spark plugs the engine don't change why?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 507 Answers

Hmmm sounds like the fuel pump is more of the issue as its sending too much fuel into the motor making it run rich or the gas that your using is too rich for the motor itself

Posted on Apr 22, 2017


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

  • 1861 Answers

SOURCE: 1993 TOYOTA TERCEL 1500cc Valve Seals Replaced now smokes much worse

You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.

Posted on Sep 27, 2008

  • 295 Answers

SOURCE: running rich.

The next step is the throttle position sensor.

Posted on May 01, 2009

  • 15935 Answers

SOURCE: I need the firing order for the spark plugs and plug wires I recently changed them and something is not in the correct order

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question!

Posted on May 23, 2009

  • 170 Answers

SOURCE: runs rich and miss fires

Make sure the spark plug wires are on right (propper firing order), and check the TPS sensor. Are there any exhaust leaks or vacuum leaks? Did you use the original intake manifolds and Holley throttle body? If not you need to replace the PROM chip with the one from the donor car.

Posted on Sep 20, 2009

  • 293 Answers

SOURCE: Car will not start.Engine turns over but spark plugs willnot fire

I would say replace ignition coil, that might me the problem, otherwise it can be the ecu, which might have some electrical problems not allowing the car to stay running. Good luck.

Posted on Dec 29, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

How do i read the codes on a 1989 nissan D21 pickup truck?

black smoke indicates oil getting into the cylinders , get the compressions tested as a first step

Jun 11, 2017 | Nissan Cars & Trucks

1 Answer

Engine run rough and black smoke coming from tail pipe why?

Go to the wreckers car junk yard and see if you can find another module or buy a new one but yes it sounds faulty... modules are non-serviceable so just get another... Run a code reader just to make sure that it is that module thats faulty

May 09, 2017 | Cars & Trucks

1 Answer

I need to buy a new set of spark plugs do it come with intake plugs and exhaust plugs?

unfortunately spark plugs do not come with a supply of sparks
so run the fault codes to find out what is stopping the ignition system from working
could be crank/ cam position sensors , broken timing belt / chain
immobilizer or failed ignition control module

May 03, 2017 | Nissan Cars & Trucks

2 Answers

Why is black smoke coming from tail pipe

It's running rich , to much gas is getting into the cylinders . Leaking fuel injectors , a fuel pressure regulator leaking , or the PCM is supplying to much fuel to compensate for a problem that it think's exists. an O2 sensor stuck lean , a bad or dirty mass air flow sensor . Is the check engine light lit ? You should take it to a repair shop an have diagnostics run on it !

Sep 22, 2015 | 1994 Geo Prizm

2 Answers

My new spark plugs are getting wet, and tail pipe has water coming out of it?

Getting water in the tail pipe is a good sign as the engine will always have moisture when not running. Water on spark plugs is a bad sign as there may be a leak from a cracked cylinder head which is then a major job, the car should be running erratically or will stop.

To check if this is the case take out the oil dipstick and see if the oil is light brown instead of black then you have a problem as mentioned so needs major overall to the engine.

Aug 16, 2014 | 2002 Pontiac Aztek

1 Answer

Was running great then it just would not start and when it did it started idling fast now the exaust will glow red

if engine is running without missfire check catyletic converter for plugging also very rich running will cause exhaust to glow but will cause alot of black smoke from tail pipe I dont reccomend driving vehicle till exhaust or rich running is fixed can lead to engine failure

Jan 14, 2011 | Ford Escape Cars & Trucks

3 Answers

Black exhaust smoke comes out of tail pipe, now it wont run how do I fix this and where do i start

Black smoke is a sign of too much fuel. First make sure the air filter is clean. Now note if the check engine light works, and if it stays on, get the codes read to get an idea of what error the computer has found. (A bad coolant sensor for the computer can make the computer think that it's well below freezing and increase fuel) Try these as a start.

Sep 26, 2009 | 2000 Ford Focus

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

36 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

77932 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14403 Answers

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

Answer questions

Manuals & User Guides