Question about 2006 Chrysler PT Cruiser

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Rough idle and intermittant misfire

Intermittant misfire and rough idle

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  • Anonymous Mar 16, 2014

    intermittent rough idle when in drive on a 2011 pathfinder.

  • Anonymous Mar 18, 2014

    idle rough and loss of power

  • Anonymous Mar 23, 2014

    Rough idle when the car is at a stand still in and out of gear. The car also stalls,but starts back up.

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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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SOURCE: 1997 skylark tries to stall on take off & idles rough, & misfire

Waited for engine to cool and checked all vacuum hoses and sensors, according to vacuum diagram and found a couple of dry rotted hoses. I replaced them and troubles went away.

Posted on Jun 14, 2009

  • 5 Answers

SOURCE: Rough idle only when engine is cold

where is the egr valve located? i haven't seen one on mine...??

Posted on Nov 17, 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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How to increase idle speed


The engine may be misfiring. I had a 2.4L engine that did that and at long last I discovered that the "Coil Cover Housing" needed to be replaced. This is because the coil cover housing has the spark plug wires molded into the plastic as part of its design. For me this caused an intermittent misfire in one of the cylinders.

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00 honda passport intermittent rough idle


called misfire.
that means its not holding closed loop status at idle
ever do a tune up on it?
old spark plugs dont work, they MISFIRE and idle fails.
all cars for 100 years ,same , gas engines.

it can also be, bad fueling. or a bad engine.
we check compression first
then spark then fueling;
in that order, engine can not run right out of that order.
so misfire.
too rich misfire.
or too lean.
we check that by gazing at the spark plug tips ,
black is rich, white is lean.
most cars are cream or very light tan color. normal.
learn to read the spark plug tips.

its and 2000, and the scan tool will show the car is not i closed loop
at idle, fix that first. and DTC errors like MISFIRE P0300 or bad idle.
the same scan too show LTFT, long term fuel trim.
if its way far from 0 , the fueling is wrong.
-3-5% is normal. -50 is stuck rich and misfiring.

Jun 07, 2014 | Cars & Trucks

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2010 Malibu LTZ rough idle


I would check the throttle body, where the fuel mixes with the air also clean all pipes/connections etc after that you should know where to go next, but give the "plate" inside where fuel and air mixes, carb

Jun 11, 2013 | Chevrolet Malibu Cars & Trucks

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2005 Ford F150 fuel pump not turning on with ignition and misfiring cylenders


Air in the injector lines #1 and #6? Also if its diesel check the preheating system (plugs/wires/fuses)

I wouldn't recommend continuous use of starter fluid!

Dec 05, 2012 | Cars & Trucks

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I have intermittant shuddering and it idles rough (rpms jump up and down) and noticed poor gas mileage, 106,000 miles and I just had the fuel filter changed, but that did not take care of it. It is firing...


P0303 is misfire number 3 cylinder P0316 is misfire on startup,Go to the number 3 cylinder at idle listen for a vacuum leak like a rupture or disconnected vacuum line more than likely that is your problem you have

Jul 19, 2012 | 2004 Ford Escape

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I am having ongoing problems with the truck miss firing and rough running. Timing is ok, replaced cap and rotor,coil. It still starts rough,idles rough and misses when at cruising speed,although it seems...


Misfire is a common driveability problem that may or may not be easy to diagnose, depending on the cause. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. The loss of 25% of the engine's power output is the equivalent of a horse trying to run on three legs. The engine may shake so badly at idle that it causes vibrations that can be felt in the steering wheel and throughout the vehicle. The engine also may be hard to start and may even stall at idle, depending on the accessory load (air conditioning, headlights and electric rear defroster, for example).

When misfire occurs, performance suffers along with fuel economy, emissions and idle quality. And, when a misfiring vehicle is subjected to an emissions test, it will usually fail because of the unusually high levels of hydrocarbons (HC) in the exhaust.

What causes a cylinder to misfire? Basically, it's one of three things: loss of spark; the air/fuel mixture is too far out of balance to ignite; or loss of compression. Loss of spark includes anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. Causes include worn, fouled or damaged spark plugs, bad spark plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder.

"Lean misfire" can occur when the air/fuel mixture is too lean (not enough gasoline in the mixture) to burn. This can be caused by a dirty, clogged or inoperative fuel injector; air leaks; or low fuel pressure because of a weak pump, restricted filter or leaky pressure regulator. Low fuel pressure would affect all cylinders rather than an individual cylinder, as would most air leaks. A leaky EGR valve can also have the same effect as an air leak.

Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited. The most likely causes here are a leaky (burned) exhaust valve or a blown head gasket. If two adjacent cylinders are misfiring, it's likely the head gasket between them has failed. Also, if an engine is overheating or losing coolant, it's likely the head gasket is the culprit.

Intermittent misfires are the worst kind to diagnose because the misfire comes and goes depending on engine load or operating conditions. They seem to occur for no apparent reason. The engine may only misfire and run rough when cold but then smooth out as it warms up. Or, it may start and idle fine but then misfire or hesitate when it comes under load. Also, it may run fine most of the time but suddenly misfire or cut out for no apparent reason. Intermittent misfires can be a real challenge to diagnose, so let's start with a steady misfire in one cylinder before moving on to intermittent misfires.

Hope this help.

Mar 25, 2010 | 1989 GMC Sierra

1 Answer

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.

Dec 05, 2009 | 1999 BMW Z3

1 Answer

Having DTC 0300 intermittant error code with rough idle and stumbling acceration on 2002 corvette with 20,000 miles just started, worse at idle and acceleration


iwould say try some octane booster sounds like poor quality fuel p0300 is a multiple misfire so start with that and i believe vettes are supposed to run 89 or better octane

Aug 05, 2009 | Chevrolet Corvette Cars & Trucks

1 Answer

1985 f150 rough idle


An exhaust manifold leak would not case it to run rough. Check vacuum lines that go to the in take manifold. If you have a line that is open it will get too much air at idle and cause a misfire intermittently. You also need to check plug wires. How long have the plugs been in the heads. Check the rotor and cap also.

Feb 16, 2009 | 1985 Ford F150

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