Question about 1985 Mercedes-Benz 300

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Runs rough when cold, ok when wam - 1985 Mercedes-Benz 300

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Make sure,you dont have air in your fuel lines,if not next check you glow plugs

Posted on Jun 22, 2009

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2007 1,5 Proton Arena. Cold starting very rough (stalls). Once on temp all Ok. ps yellow engine light on whole time.


You need to have the diagnostic codes read. Anything else is pure guessing. Those codes can point you in the right direction and often will tell you exactly what is wrong.

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4.6l. After warm-up, why does it run rough with missing?


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Starts ok when cold, when reaches normal running temp misses and runs rough.


Check ECT engine coolant temp sensor for sticking too cold letting engine run too rich causing flooding.

Dec 05, 2015 | Cars & Trucks

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Car runs rough when ac is cut on. seem like it puts a load on engine.


I believe your A/C idle up valve may have failed. They do this when hot, but test OK when cold. See here p228

http://www.turboninjas.com/camry/eg1.pdf

Mar 31, 2013 | 2007 Toyota Camry

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97 cavalier starts and runs ok from a cold start after a few minutes of warm up it starts to run rough and miss. If i try to drive it it will start out ok but won't shift automaticly but shifts fine m


Sounds like possibly more than on problem, crankshaft position sensor, or ignition module likely on starting prob which maybe affecting shifting due to hard code in ecm, or shift prob could be shift solenoid in valve body of transmission. Both parts readily available from local parts store

Nov 27, 2011 | 1997 Chevrolet Cavalier

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Stalls when trying to start ,4 to 5 times in a row. after it wams up , it runs okay thanks mike


CHANGE SPARK PLUGS AND WIRES AND FUEL FILTER IF IT HAS BEEN A LONG WHILE. SOUND LIKE VECHICLE NOT GETTING ENOUGH FUEL OR SPARK FOR COLD ENGINE START UP.

Sep 28, 2010 | 2000 Mercury Grand Marquis

1 Answer

Rough idle,tps,iac,fuel pump and filter replaced,was running great,then all of a sudden,started running bad at idle,runs ok going down the road...any thoughts?


does it run rough after warm up??or cold too,,u mite have a vacuum leak,,,take some injection cleaner spay,,carb or brake cleaner spray,,seen many different spays used,,,but spay around air intake,,around base,,see if engine will stumble,,also seen temp censer problems,,where its tell the ecu that the motors cold,so it rich-ens the fuel,,injector,,hoped it helped,,

Apr 25, 2010 | 1994 Chevrolet S-10 Blazer

3 Answers

2001 mazda tribute v6 runs rough cold ildes at about 200 rpm till it warms up then its ok what could it be


I replaced the upper & lower manifold runners seals, now it runs perfect, The reason it runs ok when warm is because the manifolds expand and seal the gaps on the surfaces that the worn old seals are not closing. Also change the spark plugs.

Jan 15, 2010 | 2001 Mazda Tribute

1 Answer

Car runs rough when cold


did you check the timing?

Mar 25, 2009 | 1997 Pontiac Grand Prix

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