Engine Runs Rough When First Started

Engine Runs Rough When First Started. Also, the fuel pressure regulator can fail to hold pressure, causing too little fuel to reach the engine. When at a dead stop, cold engine, rpms will somewhat drop and you can feel the car 'shudder' per say.

Toyota Auris Hybrid Engine running rough and ratttling from www.toyotaownersclub.com

Once the engine warms up though, these symptoms go away completely. When you start the engine, it won't run at a steady rate. Engine misfire or rough engine idle on gm 4.8l, 5.3l, 6.0l is becoming;

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When it was new i got around 15mpg around town and now get around 13mpg. It may almost stall, or it may run at varying rpms without your putting your foot on the gas, or it may do both.

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When it was new i got around 15mpg around town and now get around 13mpg. Then it idles down, but then sometimes that idle is rough, or loping.

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Checked plugs, cap, rotor and wires and all seemed quite new. If your engine starts operating in a manner that gives you the perception of “running rough”, it is likely due to a handful of common causes.

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When it was new i got around 15mpg around town and now get around 13mpg. That will prove you have a.

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That will prove you have a. Because, gm v8 engines are very prone, to a rough idle and engine misfire when cold.

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A rough engine idle, can be caused by, spark plugs or wires. Checked plugs, cap, rotor and wires and all seemed quite new.

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A mechanic would investigate these common causes first in order to rule out a simple explanation for the engine’s unsatisfactory operation. Rough idle if the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine temperature sensor.

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I have to sit and keep the idle high. Runs fine after a few seconds, but the first instance when it's cold it seems a bit rough.

The Car/Engine Has 50K Miles On It, Has Been Well Maintained And Otherwise Runs Fine.

I have replaced the o2 sensor and the coolant temp sensor, but there is no change. When the engine is started cold, the engine temperature sensor sends a signal to the dme control unit to provide a richer mixture. Rough idle at engine start for 1 or 2 minutes, then runs fine all day long afterwards.

The Common Causes For Rough Running In An Engine Are:

This morning the engine seemed to have a bad knock and ran kind of rough at the first start up. Other components in the fuel system can also cause your engine to idle rough. The issue is, upon startup first few minutes while the engine is still cold, idle will be rough.

Car Engine Revs Way Up Immediately Upon Starting Engine.

Yesterday after starting the car after a day of no driving the car ran a bit rough and this lasted a few minutes but eventually leveled off and ran smoothly again. It may almost stall, or it may run at varying rpms without your putting your foot on the gas, or it may do both. Checked plugs, cap, rotor and wires and all seemed quite new.

A Rough Engine Idle, Can Be Caused By, Spark Plugs Or Wires.

Started great but really horrible rough idle for 30 seconds then fine after that. Also, the fuel pressure regulator can fail to hold pressure, causing too little fuel to reach the engine. Tion moves on the part of a mechanic who has run out of ideas.

The Only Hitch Could Be That They’ve Been In There Too Long & Could Be A Problem Coming Out.

Fuel filter has not been changed but if it were bad, i'd think there would be worse symptoms in drivability and such but car runs wonderfully after 30 seconds. If your engine starts operating in a manner that gives you the perception of “running rough”, it is likely due to a handful of common causes. A plug that is damaged or installed incorrectly, can result in fuel being burned at an inconsistent rate.