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91subaru legacy misfires and runs rough at idle

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: rough idle and intermittant misfire

I have a 2006 with 37800 miles was told today that the fan motor and radiator must be replaced. When the car started to overheat due to the fan motor not running fast enough it blew the freon out too so now a/c wont work either. The bill is close to 1000.00 Dodge offer to pay for labor as GOOD WILL GESTURE 144.00 to be exact. I have taken it in over and over with the same complaint you have described and was told to get a tune up so I did. Warranty espired exactly 3 weeks ago. My sugestiojn would be to sell the damn thing!

Posted on Aug 29, 2008

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redbeard00
  • 957 Answers

SOURCE: P0301 - Cylinder 1 Misfire Detected on a 1998 s-10 idles rough

Sounds like a bad fuel injector. Shop would need to run a contribution test to confirm. I must say, good detective work, good luck.

Posted on Apr 29, 2009

  • 599 Answers

SOURCE: BMW Z3 rough idle on start codes read P1189 , P0173

all the codes you have are all related to the fuel trim, this problem needs to be looked at with a european capable scanner for futher tests sorry.

Posted on Dec 05, 2009

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  • 752 Answers

SOURCE: rough idle. rpms drop. misfire.

try your coil packs they go over your sparks or do plugs first and see what happens do affordable first

Posted on Feb 01, 2010

  • 1 Answer

SOURCE: 2002 Ford Taurus SEL, DOHC Misfiring

Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..

Posted on Aug 15, 2010

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Check engine light flashing check engine soon smell of gas and not running smouth


Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD

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Car runs smooth, until I have to stop at red light or stop sign, then it runs rough. When I put it it neutral, it runs smooth. Could that be the EGR valve sticking? Any help would be appreciated, than


Depends on what you mean by rough. Could be a cylinder misfire.They sometimes are not noticed as engine speed increases during driving or under light load as when idling in neutral but at idle under load as when stopped at a light in drive became noticable.
Could also be running rich. The causes of either are too numurous to list.Consult a good mechanic who can actually see and hear the problem to put you on the right track.

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I have the same problem!Running on three.I have checked compression,wires,plugs.Changed injecters,plugs.
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Nov 21, 2009 | 1998 Subaru Legacy

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Replace the catalytic converter and EGR valve

Jun 03, 2009 | 1991 Subaru Legacy

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P0301 - Cylinder 1 Misfire Detected on a 1998 s-10 idles rough


Sounds like a bad fuel injector. Shop would need to run a contribution test to confirm. I must say, good detective work, good luck.

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I'd suspect a vacuum leak in the inlet manifold, check to see if any vacuum lines might have fallen off. This can cause a lean misfire at idle, but often it's not enough of a leak to make it lean enough to misfire at higher rpm. If a leak is not obvious, check if it is a leak by buying a can of engine start (or even CRC will do) and spray it all around the inlet manifold. If the idle smooths out while you're spraying then then goes rough again, it is a leak. By spraying in specific areas you can narrow down the area of the manifold or gasket that is leaking.

Hope this helps.

Oct 26, 2008 | 1997 Subaru Legacy

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