Question about 1999 Mazda 626

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Mazda 626 1999 4 cyclinder has lttle or no power. I replaced O2 sensor, plugs, plug wires, and fuel filer. You can eventually get RPM up if you pump pedal quickly but will die if put in gear.

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Fuel pump is TOAST

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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1 Answer

Mazda misfire


Yes. If the O2 sensor is faulty, it can tell the computer the fuel mixture is too rich when in fact is is too lean.

Jul 03, 2013 | Cars & Trucks

1 Answer

Engine light came on. checked for codes, 1129 appeared. can't find the code anywhere. prior to this code, replaced O2 sensor and transmisson was rebuilt . trans was done first and then code 300 came up....



Jeep code 1129:



Possible Causes

  • RESTRICTED FUEL SUPPLY LINE
  • FUEL PUMP INLET STRAINER PLUGGED
  • FUEL PUMP MODULE
  • O2 SIGNAL CIRCUIT
  • O2 RETURN CIRCUIT
  • O2 SENSOR HEATER OPERATION
  • O2 SENSOR
  • MAP SENSOR OPERATION
  • ECT SENSOR OPERATION
  • ENGINE MECHANICAL PROBLEM
  • FUEL FILTER/PRESSURE REGULATOR (HIGH)
  • PCM

Mar 02, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Wont start


is the your car engine cranking when you try to start, first check spark plugs ignition coils, remove one ignition coil and spark plug fix the spark plug in to the ignition coil then connect ignition coil to wiring and keep spark plug body touching on ground of engine head mettle parts, ask some one to crank engine then you can see is the plug sparking or not, do the same way to all the coils and plug otherwise you have to buy a ignition spark tester, is the all the coils and spark plugs are OK then check the fuel pump, it's sitting in under rear seat, before that do one thing disconnect oxygen (O2) sensor wiring and crank engine, the thing is if your oxygen sensor completely dead fuel pump will stop working, if engine start after disconnect O2 sensor, replace new O2 sensor, otherwise need to check fuel pump relay fuse and fuel pump. is this information helped you? please vote me and give a comment.

Oct 15, 2010 | 1998 BMW M3

1 Answer

Obd2 code p0300 on mazda protege 2002


Just had one of these with a maxima, the code is multiple random misfire, when a misfire occurs, to start is do the basics, replace the plugs, check fuel pressure, clean throttle body, and coolant is topped up. also I have seen if the O2 sensor is not working correctly is can cause a misfire, you will need a scan tool to look at what the O2 sensor is doing, o rby back probing the sensor (don't damage the O2 sensor wires). If it wires replace them as well, if it has coils they usually dont give that code if one fails, it will pinpoint that a certain coil if one fals.

Oct 02, 2009 | 2002 Mazda Protege

1 Answer

89 Mazda 323 is Sputering


it could be many things. fuel pump, air filter, breather filter, pvc valve, bad spark plug, plug wires, o2 sensors, just to name a few.

Sep 22, 2009 | Cars & Trucks

1 Answer

Engine idles at 700 rpm, sometimes down to 550 rpm, and feels like it will conk out. Lately it has also started up slowly (whereas it usually starts right up). Since the symptoms started, I replaced Mass...


hi there it may be idle spped control valve it may be worth doing a cyclinder leakage test which a local garage may be able to do for u hope this helps good luck

Jul 08, 2009 | 2003 Mazda Protege

1 Answer

2002 Saturn SC1 - Starts fine and runs well until the engine gets warm. Then I will step on the gas peddle and the engine will die. Sometimes it won't die it will just have no power to move. Fuel Pump?...


Most Likely Coolant temp sensor & connector.Located in cyclinder head under upper radiatior hose.Two wires to connector yellow & black.Replacement sensor is brass (from saturn) Original is ceramic & cracks cause poor performance,stalling,idle issues.Also check plugs & wires for carbon tracking.Replace plugs & wires as a set all at once.Hope this helps

May 12, 2009 | 2002 Saturn Sl

1 Answer

P0302 CODE


Probably has a plugged catalytic converter from the misfire that was on cylinder #2, which was indicated by the code. If you wanted to confirm the plugged cat, you could remove the precat O2 sensor and drive it. It will be noisy, but if you get an increase in power, you know you have a restriction

Apr 12, 2009 | 1996 Ford F150 Regular Cab

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