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Misfire when cold moning - 2001 Audi A4

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Possible fuel quality. May also be the throttle body or idle air control valve.

Posted on May 11, 2014

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Posted on Jan 02, 2017

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Engine miss when cold, engine light on, new gas, air filter. fuel pump in tank. hot engine loght goes on off, when off at stop stalls out engine light off.


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Dec 16, 2015 | Cars & Trucks

1 Answer

Random cylinder misfire


Scan the computer for trouble codes, unless that is where you got the random misfire code. It may point out the problem. Misfires are usually fuel/air, spark (ignition), or cylinder compression related. The pcm senses a loss of power through the crank sensor, noting the crankshaft doesn't turn as fast as it should. If it cannot isolate it to a particular cylinder, it will set the random misfire code.
Would be good to know what fuel pressure is as a start. Note that cold start problems may be fuel related, as the engine requires more fuel on a cold running engine. If the coolant temperature sensor is out of whack, the computer may not realize it is a cold engine. Just a possibility.

Apr 04, 2014 | 2007 Dodge Ram Truck

1 Answer

Misfires when cold


run the fault codes first . Misfiring can be from injectors not operating properly and low fuel pressure

Mar 05, 2014 | Chevrolet Impala Cars & Trucks

1 Answer

2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua


bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

Cold engine Misfire


A 2008 mercury what? What is the model and engine size?

Apr 08, 2017 | 2008 Mercury Sable

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Hyundai Genesis V-6 engine misfire


I would check the coil those wires are probably on the same coil

May 25, 2012 | 2012 Hyundai Genesis

1 Answer

What the resistance does on top of the heater does it just tell the temperature?? it was find this moning and now i got no heat would it be my thermostat?


Assuming you mean the resistor on top of the fan motor ... That resistor controls the fan speed. Highest runs direct current to the fan, lower settings throttle the current down via the resistor.
If you mean the thermosensor on the engine coolant area, high resistance is cold, low is hot.

Dec 19, 2010 | 1993 GMC Sierra

1 Answer

Misfire, prodominent when cold start. replaced


you will need to replace the wire/coilpack for the misfiring cylinder.

Oct 05, 2009 | 2001 Ford Taurus

1 Answer

Power steering mones in the corners


Check power steering fluid first. I can always tell when a ford is coming up the street because I hear the power steering pump first. Good luck , hope it's nothing serious

May 09, 2009 | 1997 Lincoln Continental

1 Answer

Engine


hard starting in the moning if your engine is diesel check your heater plugs means when the diesel engine is cold it needs to heat up, also injection pump and injectors can cause.check the engine compretion.
the petrol engine when your sparkplugs is worn out it can be or when the cyliner head valves is leaking puting more petrol on the combustion chamber.

Oct 14, 2008 | Mitsubishi Colt Cars & Trucks

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