Question about 1991 Mazda 929

1 Answer

91 mazda 929 valve cover gasket leaking

This problem is causing the engine to run rough and consume gas at an alarming rate.

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1 Answer

I doubt the gasket is the entire problem

Why wouldn't you replace the valve cover
gasket,then explain the driveability ones?

Posted on Dec 08, 2012

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Posted on Jan 02, 2017

  • 1341 Answers

SOURCE: 2004 Mazda RX-8 PO455

It will not go off by itself,you will need to reset it by connecting to a diagnostic tool.Once cleared if there is any other problem then it will trigger the check engine light again.Hope this helps..

Posted on Sep 03, 2009

  • 47 Answers

SOURCE: Check Engine light code 1506

this code indicates under-speed error has ocurred.
sets when PCM detects idle speed is 100 RPM lowerthan expected for 14 sec while break pedal depressedand steering wheel is straight ahead.

possible causes: IAC valve failure,intake leak,throttle body failure,opens or shorts in wiring between IAC and PCM.

Posted on Sep 16, 2009

  • 275 Answers

SOURCE: 2003 Mazda Tribute will start, idle rough for a

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

  • 1 Answer

SOURCE: oil leak in my 98 mazda protege

Could be a rear main seal.

Posted on Feb 01, 2010

  • 244 Answers

SOURCE: How to replace valve cover gaskets on a 2000 mazda

just look at the valve covers some are held in place with 6 bolts some only 3 do one at a time and keep working area clean and free of dirt n grease. clean valve cover good and have clean hands when handling gasket, and there your done just replace and bolt down , check bolts again for tightness in a couple weeks.

Posted on Apr 25, 2010

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1 Answer

My 94 nissan altima is running rough.


The valve cover gasket has nothing to do with the engine running rough. It simply seals the mating suface between the valve cover and the cylinder head. When bad, it will leak some engine oil. It will NEVER cause your problem. I suggest taking it to a reputable repair facility, and never return to the place that gave you the first diagnosis.

Oct 07, 2012 | 1994 Nissan Altima

1 Answer

1994 mazda 929 rough idle & stalling


Sometthing to think about. When it is cold the engine it runs in close loop, after it warms up it gos to open loop.

May 15, 2012 | 1992 Mazda 929

1 Answer

I have mazda 6 2004....earlier i have radiater leak...then i repaired...then again it started heavy fuel consumtion...and chek engine indicator appears on dash board...i have engine oil leakege also..


FOR oil leak issue and other problems you mentioned check the following help links:---

Radiator leaking? http://repairhelpcenter.blogspot.com/2011/12/radiator-leaking.html

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consuming more fuel? http://repairhelpcenter.blogspot.com/2012/01/toyota-tercel-consuming-more-fuel.html--------- How to maximize fuel economy on your vehicle? http://schematicsdiagram.blogspot.com/2011/11/how-to-maximize-fuel-economy-on-your.html

-------

Check Engine Light On car? http://schematicsdiagram.blogspot.com/2011/06/check-engine-light-on-car.html

---------

Common Causes of Car Oil Leaks?

http://schematicsdiagram.blogspot.com/2011/12/common-causes-of-car-oil-leaks.html

--------

Troubleshoot Car Oil leak?

http://schematicsdiagram.blogspot.com/2011/12/troubleshoot-car-oil-leak.html
---------

Car oil leak?

http://schematicsdiagram.blogspot.com/2011/12/car-oil-leak.html

---------
Car oil leaks from valve cover gasket?

http://schematicsdiagram.blogspot.com/2011/12/car-oil-leaks-from-valve-cover-gasket.html

---------


Rear oil seal leaking?http://schematicsdiagram.blogspot.com/2011/12/rear-oil-seal-leaking.html

------------

leaking oil from oil pan?
http://howtobyme.blogspot.com/2011/11/kia-sportage-leaking-oil-from-oil-pan.html

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leaking oil from timing cover?http://technoanswers.blogspot.in/2012/02/toyota-corolla-leaking-oil-from-timing.html

----------

How to Check Differential Oil Leaks and Replace Oil
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-differential-oil-leaks-and.html

----------


Oil leaks from air filter on ford?http://technoanswers.blogspot.com/2012/01/oil-leaks-from-air-filter-on-ford.html

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---------This will help. Thanks.

Jan 27, 2012 | 2004 Mazda 6

3 Answers

My 91 oldsmobile 98 runs rough in idle but when driving run smooth.


Rough idle is a very common problem on 4 cylinders, but I believe the 98 Regency has a 6 cylinder in it, right?

Sometimes the coil packs get iffy, and sometimes the EGR Valve gets a leak in it causing a rough idle.

When the accelerator pedal is depressed, it can change things so that the engine seems to run smoothly.

However, I would look for codes to see if anything intermittent is occurring in the engine that may need attention.

The OBD-I scanner can help to diagnose the problem, if anything is out of specifications on the engine in question.

The owner will have to find a technician that has such a scanner.

Aug 29, 2010 | 1991 Oldsmobile Ninety Eight Regency

1 Answer

My Mazda 626 is running rough and has sparks coming from the sides of the spark plug leads also i can hear air coming from the engine bay.


Remove you spark plug leads and see if they are soaked with oil. If so you will have to remove your valve covers and replace the valve cover gaskets. They tend to leak oil into the area of the spark plug holes. You will have to replace the plug wires also. Just replace them one at a time so you will not losthe firing order.Hope this helps. Leave comment.

Jul 11, 2010 | 1992 Mazda 626

1 Answer

How to change valve cover gasket


Remove everything above the valve cover, unbolt the valve cover remove old gasket and replace. Pay attenstion to where everything went and mark spark plug wires .

May 11, 2010 | 1990 Mazda 929

1 Answer

I have a 2005 F150, that has been running a little rough and the check engine light came on. Checked the code and it read 0305. I'm not sure what I should do next.


trouble code 0305 is for cylinder misfire. misfire code for cylinder #5 which is what a P0305 code represents. There will have leaking valve cover gaskets allowing oil to contact the boots of the ignition wires and short the high voltage to ground causing the misfire.in this case check whether plug wires, sparkplugs and valve cover gaskets are in good shape .this will help you to determine the cause of your check engine light on. This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

Mar 17, 2010 | 2004 Ford F150

1 Answer

1999 mazda 626 4cyl runs rough at idle , engine dies at idle. check engine light on fault code 171 looked for vacum leak none found. replaced MAF sessor no help. any ideas


You may have to dig deeper for a vacuum leak. It's possibly the intake manifold gasket. Try spraying some starting fluid around the intake manifold. Also try disconnecting the brake booster and plugging that hose, the diaphram in the booster could be ruptured, causing a vacuum leak. Check the PCV valve and hose too.

Mar 05, 2010 | Mazda 626 Cars & Trucks

1 Answer

I have a 1990 mazda 929 and it is sucking transmission fulid into the engine Ive change the modulator valve what else could it be. rebuilt the engine twice and same problem occures


auto trans cooler if located in radiator,check auto cooler lines run from trans(like brake line tube or rubber,run to side or bottom of radiator,could be leaking into radiator,thus engine...not uncommon or older or poor quality cars,in your case older

Oct 22, 2009 | 1990 Mazda 929

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