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Nissan pulsar 2000 running on 3 cylinders - sometimes cylinders 3 and 4 do not fire up engine is noisy / clatter sparkplugs are black

I have tried using v8 fuel and petrol injector cleaner which has not helped

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Big Poppa Ma
  • 302 Answers

SOURCE: Check engine light on

There are three kinds of gasoline engine misfire scenarios, first there is the "under load" misfire and there is the "at engine idle" misfire, and finally there is misfire continuously. All engine misfires exist because one of three things has occurred. First, a cylinder has lost compression, a cylinder needs a certain amount of compression to operate correctly. Second, the ignition system has failed or is failing intermittently, spark is needed at the time of compression to ignite the fuel air mixture. Third, the fuel air mixture is incorrect, proper mixture is needed for the ignition system to ignite fuel properly. If any of these conditions occur in the engine, the engine will misfire.
1. Low or no compression can be caused by

a. burned or leaking intake or exhaust valves
b. worn or broken piston or piston rings
c. worn out camshaft
d. wrong weight motor oil was installed holding the cam followers from adjusting
e. broken valve spring
f. failed head gasket.
2. Ignition system has failed or is failing
a. spark plug has fouled or is worn out
b. ignition coil
has failed
c. spark plug wires have shorted
e. engine control module coil driver has failed
3. Fuel/Air Mixture is incorrect
a. vacuum leak at the intake manifold
b. fuel injector has failed
c. EGR valve is stuck open
d. mass air flow sensor has failed
e. oxygen sensor has failed
f. air intake boot is cracked

common problems:
1. fuel injector has failed or is failing
2. spark plug wire has shorted
3. spark plug is worn out or is cracked
4. ignition coil has failed is failing

Testing a coil on the car is pretty easy. No special tools are required. Just remember to be careful, the amount of electricity generated by your ignition system can be dangerous. If your coil is already off the car, or if you would like a more specific data-driven test, you can bench test your coil. To set up the test, remove one spark plug wire from its plug, then remove the spark plug using a spark plug socket. Next put the spark plug back into the spark plug wire. Be careful not to let anything drop into the empty spark plug hole -- very bad.

Posted on Dec 07, 2008

  • 1118 Answers

SOURCE: cannot get 1987 chevy van 20 to keep running... stalls out

Best do a fuel pressure test. Should have chg. fuel filter from the get go. The only other filter is on the end of the fuel pump in tank. Bad gas and dirty gas will plug up fuel filter, hense burn pump up.

Posted on Apr 11, 2009

  • 1 Answer

SOURCE: Nissan b14 rough idle, black smoke

i have a nissan b-14 idle roughly sometimes cut off when in traffic. any solutions???????

Posted on Dec 01, 2009

  • 15 Answers

SOURCE: check engine light flashing runs rough not firing on all cylinder

take of the fuel filter and blow it out. i had the same problem with a 2008 ford f150 5.4 v8.

Posted on Apr 19, 2010

SOURCE: My 1986 Nissan 300zx non-turbo was running fine,

It sounds like the number 2 injector is hung open.

It will dump fuel and cause all sorts off issues with the ECU.

You should ohm that injector and compare it with the others to see if it is wildly different. If so, change it out and retest.

Posted on Jun 27, 2010

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Hi everybody, i have a 2003 mitsubishi montero limited 3.8L i was changing my sparkplugs and disconnected the three of them and forgot wath is the order to connect to the ignotion coils


Firing Order1-2-3-4-5-6.
NOTE: This engine is a six-cylinder engine. The cylinder numbers are assigned as 1-3-5 for the right bank and 2-4-6 for the left bank from the front of the engine (timing belt side). This engine is fired in the order of 1-2-3-4-5-6 cylinders.
found this helpful answer from mitsubishi mechanic on JustAnswer com

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