Question about 2004 Mazda 3

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2004 mazda 3 2.3l with knocking noise

I have a 2004 Mazda 3 with a 2.3l motor that has right around 100k miles on it. The only problem I am having with it is that it starts knocking on the top end as soon as it gets warm. I took it to a mechanic and his guess is that it might be a valve but I am looking for the real answer. Any suggestions are deeply appreciated!!!

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6 Suggested Answers

  • 2 Answers

SOURCE: 2002 Mazda Protege 5: I

I would check the sway bar linkages, they are usually the first to go, and they are only $40. Its an easy 'do it yourself' project, remove the old one with torches or a grinder (with a small cutting wheel). You can also use a vise grip and sockets but it takes longer.

You can't tell these are damaged until you remove the part. I change mine every 100 000km or so.

Posted on Dec 12, 2008

mnabi01
  • 94 Answers

SOURCE: 2004 mazda 3 stalls off idle

i found out from dealer there was a service bulitan for this problem. mazda reprogram the ecm for idle speed contorol . problem solved.

thank you

Posted on Jan 28, 2009

  • 131 Answers

SOURCE: How to replace knock senor switch on 2002 mazda protege 5


Removal & Installation

  1. Disconnect the negative battery cable.
  2. Remove the intake manifold.
  3. Disconnect the sensor connector.
  4. Remove the sensor from the engine block.
  5. Installation is the reverse of the removal procedure.

    0900c1528019fa95.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Knock sensor removal and installation-Mazda 3

  1. Disconnect the negative battery cable.
  2. Remove the intake manifold bracket.
  3. Disconnect the sensor connector.
  4. Remove the sensor from the engine block using special tool 49H018001 or equivalent.
  5. Installation is the reverse of the removal procedure.

    0900c1528019fa96.jpg enlarge_icon.gifenlarge_tooltip.gif GL G

Posted on May 10, 2009

  • 161 Answers

SOURCE: Check engine light/2001 Mazda Millenia

The check engine light comes on when there is a problem with your engine and throws a code which it then stores. That code can be "read" by an OBDI/OBDII scanner and should give you the info you need. If it was scanned and the codes "read" the check engine light should of been re-set. If your car is running well have your mechanic re-set it; if it comes on again take it and have it checked again. No system is fool proof and there may still be a problem. Hope this helps.

Posted on Aug 31, 2009

  • 20 Answers

SOURCE: 2003 Mazda 6 leak

i would try an easy fix for this problem, change your PCV if its burning oil like that! also checkout 6crew.com, im "ed4ward1982"

Posted on Oct 17, 2009

co7196
  • 3433 Answers

SOURCE: 2004 Mazda MPV vacuum line from pcv valve and

You have the wrong type hose on the pcv valvle. It isn't vacuum hose.

Posted on Nov 12, 2009

Testimonial: "thank you you have been very helpful i understand now but the hose that is on the new pcv valve is a vacuum hose "

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