Question about Mazda 323

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Mazda 323 bj not exccelerating

Engine starts normally,but as you mash the accelarator pedal engine stutters and then stalls,I changed the air flow sensor,o2 sensor,ecu and throttle body,but same problem

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  • Mazda Master
  • 5,370 Answers

ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION


It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

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Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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These details will help.

Thanks.

Posted on Dec 31, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 321 Answers

SOURCE: buick lesabre nightmare 2

  • The PCM doesn't even see the O2 sensor until engine temp has reached operating temp,the vehicle goes from open loop when cold,to closed loop when warm,where the PCM uses the O2 sensor to measure the rich/lean of the exhaust content,and from that,adjust fuel richness to achieve 14.7 to 1 air/fuel ratio.So when cold,the O2 sensor is out of the picture anyways.When unplugging sensors,it can be deceitful.The PCM has a program whereas,if a critical sensor (such as the mass air flow) is somehow damaged and out of the picture,the PCM will substitue a generic value that will allow the engine to stay running.So,by unplugging the MAF,it did try to run on it's own better than plugged in,there's the problem area.The vehicle is running better with the MAF unplugged,because the MAF is likely bad,and the PCM is substituting it's generic value when it IS unplugged.Something to recheckThe PROM update is a newer program for the PCM,and likely won't fix it unless the PCM is bad.I would try a good used PCM as a last or later resort,because i have seen my fair share of defective PCM's too.I have taken some PCM's apart,and found capacitors that had gone bad and leaked all over the circuit board,mostly Honda and Mitsubishi and Chrysler though.Good luck,keep me posted.

Posted on Aug 01, 2008

  • 3 Answers

SOURCE: engine light on 2002 mazda protege is on even after changing o2

Try cleaning the Mass Airflow (MAF) Sensor. My 2002 Protege check engine light came on and it started stalling at stoplights if I didn't keep the engine revved a little. Manager at AutoZone checked the computer code for the light (P0171?), and it said it was running lean. He suggested I try the MAF sensor cleaner they have ($6.99) rather than replacing the 02 sensor, etc.; it made a *significant* difference. (I think I need to do it again to get it totally cleaned out, but the can is for at least 4 cleanings.) The MAF sensor is the large component that air goes through right after the air filter. If you don't have the repair manual for the car (search online for PDF's), you search for the part online to see what it looks like. Mainly, it's a tube about 4" across with some small wire things inside. The cleaner can said it was a 10 minute job; mine took 20 minutes, but only because the tube leading from the MAF sensor to whatever is next (a kind of bent elbow tube, with a couple of accordian-style ripples) tore, and I had to duct-tape that up to seal it. (Still haven't gotten that replaced - found them online for ~$40. Maybe this weekend...)

Posted on May 16, 2009

  • 2309 Answers

SOURCE: 2001 aztek misfire ad stalls when gas is given

before you spend anymore have it hooked up to a real time engine analyser like a bdm pro, or a snapon scanner, take it for a drive and snapshoot scanner when the problem arises, could be a sensor like tps or an actuator, but will not register a code, just a flag

Posted on May 27, 2010

ftw1952
  • 10319 Answers

SOURCE: I have a 2005 pt

Thisa sounds like a worn TPS on the throttle body. Although there are literally dozens of sensors that provide critical data to the engine management computer of a modern, fuel-injected engine, few are actually adjustable, or can be affected by adjustments of related components. The throttle position sensor, often referred to as the TP sensor or TPS, is one of these rare devices.


It is important to get to know the function and servicing of this sensor for a couple of reasons. As with any electro-mechanical moving part, they have been known to malfunction or ultimately just plain wear out. Besides that, they are often victims of improper service procedures. These procedures will either result in damage to the sensor, or impair its range of operation. In any event, a malfunctioning, damaged, or misadjusted TPS will cause a variety of driveablility symptoms, often accompanied by a check engine MIL (malfunction indicator light) displayed on the instrument panel.

You can follow this vidio and see how to check the TPS if it needs replacing and how to set the new one up to operate correctly. Just click onto the provide link below & good luck!

http://www.youtube.com/watch?v=A_4Us8z9Q3g

Posted on Dec 28, 2010

cansmo
  • 2431 Answers

SOURCE: car idles rough & wants

You have 2 faults going on this is common failure patter a idle air control and egr open, the 02 sensor was not at fault it was reporting the engine condition and had nothing to do with the stalling listen to the engine you may find a vacuum hose rupture follow it along the pcv valve you mainly have a vacuum leak or a open egr

Posted on Aug 07, 2011

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Had a p305 on my 2005 buick rendezvous engine light is on changed the coil pack. it still hard to start unless i mashed the gas. it stalls at the light


Starting Mode
With the ignition switch in the ON position, before engaging the starter, the PCM energizes the fuel pump relay for 2 seconds allowing the fuel pump to build up pressure. The PCM first tests speed density, then switches to the mass air flow (MAF) sensor. The PCM also uses the engine coolant temperature (ECT), the throttle position (TP), and the manifold absolute pressure (MAP) sensors to determine the proper air/fuel ratio for starting. The PCM controls the amount of fuel delivered in the starting mode by changing the pulse width of the injectors. This is done by pulsing the injectors for very short times.
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If the engine floods, clear the engine by pressing the accelerator pedal down to the floor and then crank the engine. When the throttle position (TP) sensor is at wide open throttle (WOT), the PCM reduces the injector pulse width in order to increase the air to fuel ratio. The PCM holds this injector rate as long as the throttle stays wide open and the engine speed is below a predetermined RPM. If the throttle is not held wide open, the PCM returns to the starting mode .
You could have a dirty or bad mass air flow sensor .
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I had a simular problem on my car, but it is'nt a Pontiac, it's an Mazda 323. I solved the problem to be that the Idle air control valve was dirty, and therefore sticking. This caused the engine to idle eratically and sometimes stall. Sometimes it would even stall whilst changing gear.
On most cars the idle air valve is located at the top of the engine, normally near the air filter. And to be honest is very easy to service. It's just a matter of disconnecting and cleaning it with carburetter cleaner.
You probably know this already lol, I'm not sure if you mean this when you say sensor. Hope this was of some help! :)

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Hello.

In the first instance. Unhook the air flow sensor and see if this make a difference. If it does your Mass Air flow sensor needs cleaning or replacing.

Try changing your airfilter and Spark plugs. I would also use some heavy duty injuctor cleaner in the fuel.

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lquitori, Check your air filter, and mass air flow sensor for any obstructions and then check the throttle plate on the throttle body. holler back if you need more help. quicbric

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