Question about 2005 Mazda 3
Posted by Anonymous on
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Posted on Jan 02, 2017
Depending on vehicle mileage, you are likely ready for a tuneup that would include new
1. Spark plugs
2. Spark plug wires
3. ignition cap/rotor, if used
4. new serpentine belt(s)
5. Fuel system cleaner such as Chevron Techron or Regane
6. New timing chain/belt if mileage warrants--check owner's manual
Barring serious mechanical issues, the above items should eliminate the idling problem OR make it much easier for a shop to trace the real problem using a OBDII Scan Tool.
Posted on Jan 07, 2010
check the fuel filter air filter and vacuume lines if they all good make sure the spark plugs are making a bright blue spark
Posted on Jan 20, 2010
My daughter has a 2005 Mazda 6i 2.3L and it idled rough/stall/ shift hard fom 1st to 2nd. After replacing many parts: O2 sensors ,purge valve,3way valves, plugs, and checking all hoses and no cure I discovered on another site that the Pcv valve and hose are behind the air intake. you can get to it from underneath. It runs from the bottom of the manifold to the top and I had to **** the hose at the top to pull it off the nipple. I removed the throttle body and hose, the two shuttle valves and unbolted the starter and moved it out of the way. Lube the hose well and may need a large screw driver to help push it on and then work the clamp on. You can stand up and reach under the manifold and work it on. It is exasperating but can be done. It beats taking the whole manifold off. The old hose had a 2 and half inch **** /crack in it. It has a slip cover over it to insulate from the engine and helps seal the crack at times which explains all the erratic behavior. I thought one of the other hoses up top was the pcv but was wrong. The hose $15. Bad engineering as far as location. This cured the problem. The local Dealer told me they figured out how to do it without removing the manifold and shared the info with me.Car runs great now and shifts smoothely. This task is for shade tree mechanics that like to do this stuff. Be sure and not break the top nipple, it swivels a little and appears to be made out nylon etc.
Posted on Dec 15, 2010
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