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At idle miss firing on cyl 1 3 5

Service engine light came and wher checked out computer reported miss firing on on bank of cylinders. Changed plugs and cleaned fuel injectors but. Problem persists. Cannot find any vacuum leaks

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  • Paul Ross May 04, 2013

    I don't have the codes but it was cylinder 1,3,5. The plugs were changed and the injectors removed, cleaned and tested. Problem still persists. Could it be timing? Maybe the timing chain slipped on that bank.

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  • Ford Master
  • 40,764 Answers

Check connectors for injectors and plug coils. The read out would have told you what injector or plug was faulty. Come back with the code numbers.

Posted on May 04, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

maklean
  • 1665 Answers

SOURCE: Misfire on cylinder 1 and 3

Do you observe abnormal idle speed? It may be just an indicator fault; not a really engine firing problem.
Sign up free at link http://ww.hmaservice.com/
You will find a lot of technical information for your model.

Posted on May 20, 2008

  • 12 Answers

SOURCE: Check engine light comes on temporarily - engine chuggs at idle

Before changing you pcm try cleaning your egr valve. remove the valve and see if its stuck in the open position if so use a small pick to clean around the spring.

Posted on Mar 12, 2009

66 chrgr
  • 1011 Answers

SOURCE: Getting a code of misfire on cylinder 2, Bank 1 and lean code

Higher compression usually only happens when extra oil is introduced in to the cylinder.Your rings seem good due to the good compression .If there is a worn valve guide in that cylinder this would allow oil to seep into the cylinder .Also allowing for extra rocker arm movement which could be your chirping noise and cause a rough idle.The lean code sounds like something different like the is still a vacuum leak.It sounds like you know cars well ! I hope this helps

Posted on Nov 10, 2009

wireguy212
  • 1627 Answers

SOURCE: how do i fix my 2001 cadillac catera idle problem

The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.

Posted on Jul 15, 2010

dttech
  • 4803 Answers

SOURCE: vehicle came in for check

A misfire at idle that smooths out at cruise is ALMOST ALWAYS caused by a vacuum leak. Take a hard look at your fuel trims at idle. If the Bank 2 Long Term Fuel Trim is more than + a couple points higher than the Bank 1 trim, your problem is most likely a vacuum leak. If the Fuel Trims even-out while holding the engine at 2000 RPM for about 20 seconds, then a vacuum leak is DEFINITELY your problem. I would suspect a leaking lower intake gasket leak because an upper plenum leak will normally affect all cylinders.

Posted on Jan 30, 2011

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The problem is in the bank of cylinders that includes cylinder 1. Running too lean at idle can often be caused by an air leak between the mass air flow sensor and the throttle body, a leaky intake manifold gasket, or some other vacuum leak. "False air" is downstream of the MAF sensor so it is not measured. The computer only attempts to add the correct amount of fuel to air that it knows about. It will attempt to compensate for lean mixtures but at a certain point, it will turn on the check engine light.

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