Question about 1993 Subaru Legacy

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Vehicle runs rough but if I disconnect alternator vehicle runs smooth

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Alternator output voltage too high

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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2 Answers

What happens if you disconnect the battery and leave it disconnected for 2-3 days


NO VEHICLE DETAILS! BUT more than likely you have plug wires crossed, double ck first before taking t/covers off to ck sprocket alignment..if all checks out and still runs rough and overheats, contenplate a head gasket situation.

Apr 05, 2016 | Cars & Trucks

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01 Ford Escape Random Misfiring Running Rough


You'll have to figure out if it is fuel or ignition related to proceed.
Could be injector problems, or spark problems.
Did you have the computer scanned for trouble codes ?

May 04, 2013 | 2001 Ford Escape

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The suv died while I was driving. Had it towed to a shop. They replaced the alternator as well as the harmonic balancer. Harmonic Balancer was replaced with an aftermarket part due to the fact Japan is not...


Assuming that the alternator was bad, preventing the battery from fully charging and the mechanic got it right. However the replacing the "Harmonic Balancer" makes no sense as the "Balancer" only smooths out the tendency of the engine to vibrate. See: http://www.youtube.com/watch?v=Ex_yJ_V5UH8
As to it running rough check the spark plug wires as these on older cars tend to break the carbon path in the center of the plug wires thus loosing spark to a plug from time to time. Start the engine at night when it is dark and look under the hood at the plug wires to see if you have any arcing. Replacing the plug wires cost a little less than 20 bucks.

Apr 13, 2011 | 2001 Mitsubishi Montero Sport 4WD

1 Answer

CAR IS NOT CHARNGING THE BATTERY BUT WHEN I DISCONNECT THE BATTERY WHILE RUNNING, THE BATTERY CABLES SHOW 14V. AND WHEN I CONNECT IT BACK, THE CABLES JUST SHOW BATTERY VOLTAGE AND IT IS GOING DOWN. WHAT IS...


You problem could be one of two thing a charging problem or a battery dying. yes you can get the voltage but not get the amperage to charge a battery. Do the lights dim at idle and brighten as you accelerate? Does the car continue to run but the battery goes down after sitting for a while? DO NOT DISCONNECT THE battery cables with the vehicle running as this can result in damage to the charging and other systems. Here are things i look for (1) does the car start on it owns without a jump? (2) does the vehicle idle smooth? A dying battery uses more charging load on the alternator and can result in rough idle and poor performance and gas mileage. (3) this is an odd one but but has helped int he past, does the battery smell like rotten eggs? When a battery is dying it can stink when it is getting a charge from the alternator. To be sure go to your local auto parts store for a free battery and charging check. Takes few minutes and no cost. Hope this helps.

Mar 05, 2010 | 1988 Mazda MX-6

1 Answer

Eagle vision 93 lot of fuel


CHECK FUEL PRESSURE AND THEN CHECK YOUR COOLANT TEMP READING.iF IT IS SHOWING 144 CHECK THE WIRE AND IF GOOD REPLACE SENSOR

Feb 26, 2010 | 1995 Dodge Intrepid

1 Answer

1996 FORD CONTOUR 4CYL ROUGH IDLE ROUGH ACCELERATION


no problem. If you are getting that low of voltage on a load then you might want to test the alternator as well to make sure it is running at capacity.

Feb 23, 2009 | 1998 Ford Contour

1 Answer

RUNS ROUGH STALLS CHECK ENG LIGHT ON


The plug is located at the bottom of the steering column.The fault seems to be the mass air meter though.

Nov 26, 2008 | 1994 Volkswagen Golf

2 Answers

Rough idle only when engine is cold


check to see if the vehicle has EGR valve most of them are either elecrtronic or vacum controlled disconnect it and start it check and see if this smoothes out cause it sounds like the valve is staying open while the engine is cold if thsi solves the problem replace the valve.

secondly take a small screw driver aor a tiny hammer and tap the valve while the engine is running if it smoothes out replace the valve the valve is carbon filled and needs to be changed .

Oct 19, 2008 | 2002 GMC Envoy

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