Question about 2008 Mazda Cx 9

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Slight engine hesitation on my 2008 mazda cx9 with 80k miles, does not happen on acceleration but while at cruising sppeds of +40mph. already did transmission flush and fuel injector service but still

Is he solution replacing the spark plugs ?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

thutson66
  • 96 Answers

SOURCE: 2001 mazda protege will not start

well, with all that you have changed the only two possible things that are left PCM and the ECM....

Do you have an alarm system on this vehicle? If you purchased this car second hand it may have something that is inhibiting the engine from firing. From what you have told us here that would be where I would start looking.

I really hope this is helpfull

Posted on Aug 10, 2008

Ticodude
  • 53 Answers

SOURCE: #5 cylinder misfire

I have a corolla and had #4 cylinder misfire also diagnosed at autozone. After changing the spark plugs, problem persisted, along with the same error code, so they recommended changing the spark plug wires, and that is what fixed it. I would have changed the rotor cap too, but was low on dough. Glad that was not the problem.

Posted on Dec 29, 2008

motor1258
  • 6674 Answers

SOURCE: Flat spot around 2000r/m

Try accelerating at different speeds, for example push pedal further down, or ease into it real slow & let it climb, and see if it still dies at 2000 rpm, just to see if pedal position makes any difference to see if maybe TP sensor has bad spot.

Posted on Mar 27, 2009

  • 1 Answer

SOURCE: hesitation during acceleration

could be the type of plug you are using.I was told only to use ngk plugs.I recently put bosch plugs in my mazda 3 and the check engine light came on and it started missfiring.

Posted on May 03, 2009

  • 1 Answer

SOURCE: 2005 Mazda 3 idles rough at stop light and sometimes dies

The problem is a faulty solenoid in the vapor recovery system. The solenoid is sticking open and allowing fumes from expansion of fuel in the fuel tank to enter the air intake and smother the engine. This is how the Mazda service tech explained it to me. It is a known problem on the Mazda 3 in various trims which Mazda refuses to acknowledge. Usually the check engine light comes on and the engine diag code reads mass airflow sensor, which is incorrect. I dealt with this for 6 months on my wife's 2005 Mazda 3i before the dealership figured it out. My cousin bought a 2007 Mazda Speed 3 which developed the same problem after a few months and was cured by the same fix.

Posted on Aug 26, 2009

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Engine stumbles only in no load circumstances. Idles smoothly, and stumbles only in no


no miles stated, 400k miles> or 100 = 100k?
if any 95 has 100k miles that be like a new car. no ?
5k /year, wow...
trouble is i cant drive car. and see this effect.

the issue is acceleration, right? :called Hesitations !
and only happens on a hot engine , yes?
and never happens wide open throttle.? correct?
HAPPENS:
only when tipping in the throttle at cruise. (then self corrects )
THE TPS sensors does that.
The TPS is a demand sensor. it sees driver DEMAND
acceleration, and this is detected and the PCM goes to ENRICH mode. this is done or the engine goes LEAN until the MAP BARO READINGS, catch up and correct fueling.
that is my wild useless guess. (not driven and me not scanning the PCM while it fails.)

The TPS is a rate of change sensor.
This is because all air meters made are slow.
The TPS hides this fact. until bad.
there are other causes,but im not there with my scan tool..
and (box of gauges)

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