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1997 5.7 LITER VORTEC #4 CYLINDER MISFIRE

#4 CYLINDER MISFIRING

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Bad coil , bad valve , bad injector , bad spark plug .

Posted on Feb 14, 2014

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Posted on Jan 02, 2017

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I have a 2000 4.3 liter vortec and its showing a misfire on number 5 and i have checked all the basics and then some. it hesitates trying to start except for first thing in the morning


It could be a fuel or compression problem that is causing your misfire. To eliminate a clogged injector as a possible cause, you can swap injectors between cylinders and see if the fault follows the injector in question. Or it could be a fouled or incorrectly gapped spark plug causing the misfire. Do a compression check with the engine warm, preferably right after a misfire event.

Sep 17, 2017 | Cars & Trucks

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I have Codes po300,po303,po303pd toyota 4 runner


P0300 - Random/Multiple Cylinder Misfire Detected or Misfiring Of Multiple Cylinders
P0303 Cylinder 3 Misfire Detected

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Mercury cougar 1997 flashing engine light


When your engine light flashes about 95 percent of the time (f not more) means that your vehicles computer (PCM) has detected a misfire and that the misfire at the time it is flashing that the misfire is bad enough to cause damage like to the catylist converter(s), oxygen sensor and a number of other things. You need to find out which cylinder has the misfire. You can go to your local auto parts store and most of them will pull diagnostic trouble codes (DTC\'s) for free. Now once you get the DTC(s) you can narrow down whcih cylinder(s) has the misfire by what DTC they pulled. For example a DTC of P0301 means a misfire in cylinder 1, P0302 would be cylinder #2 and so forth. A P0300 means multiple random misfire a much further testing needs to be done in order to diagnose. Say you have a P0301, depending on your engine size you will need to isolate cylinder # 1 to diagnose. If you have a 3.8 liter engine in most cases it\'s the fuel injector ot a bad spark plug wire for that cylinder that is bad but if you have the 4.6 liter most common cause is a bad ignition coil for that cylinder as they have a seperate coil for each cylinder but it could be an injector too instead of the coil. I\'m just giving you the most common causes but diagnosing needs to be done in order to replace the faulty part(s). Other causes of a misfire are crank or cam position sensors, a vacuum leak, Faulty spark plug wire (if you have the 3.8), engine problems (internal), electrical and/or wiring problem or even the PCM. Many other things can cause this, these are the most common. Gatting that DTC is vital in order to diagnose. If you need further help as far as testing procedures once you get any DTC\'s I\'ll be happy to helps you diagnose the problem. Hope I was able to help you understand what\'s going on...

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1 Answer

1996 5.7 vortec misfire cyliner 4 and 6


have you cleared the codes between fault reads
clean the maf first .....replace the maf if faulty
coil packs ?
injectors

Apr 16, 2017 | 1996 Chevrolet Tahoe

1 Answer

1 cylinder misfiring.. what does that mean?



  • Hi, I can help.

  • A miss fire is when a cylinder does not fire off or fires poorly or at the wrong time. This can be a plug or plug/coil wire most of the time but not always.
  • Your engine is a 1.6 liter - 4 cylinder engine. One of them cylinder's is not firing as it should.
  • Did you get a scan and a P0 code that said cylinder misfire? List it here and I will gladly help you figure out what needs to be done to fix it.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Sep 08, 2011 | 1997 Honda Civic

1 Answer

1997 Aerostar 4 liter engine has miss on several cylinders. New wires and plugs. Miss is intermintent. Usually worse under load. At times van runs fine.


check for vacume leaks on intake and other vacume hoses. random misfire is also usually a clogged fuel filter or pressure regulator. could also be a cam or knock sensor. are their any trouble codes.

Aug 16, 2009 | 1997 Ford Aerostar Extended

1 Answer

Rough idle and misfire on ram truck


Change cam sensor & erase codes.( disconnect battery for a minute or so after.) 340 & 1391 refer to cam sensor problem, and all other 300 codes are cylinder misfires that should disappear when cam sensor fixed.

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200 Chevy Tahoe 5.7L


Do you have any engines codes like P 0300. Sounds like ignition coils ,check input wires to coils if okay replace both coils.I have seen this few times

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hi there, if you can feel the misfire at an idle but not at a higher rpm than the fuel pressure regulator is bad im working on one right now that has mifire code and random misfire codes coming up

Aug 28, 2008 | 1998 Chevrolet K1500

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