Question about Buick Century

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I have noticed loss of power . I have 56,000 miles on car, and just had the plugs and plug wires replaced. I have put in two cans of injector cleaner and am now driving on the second can in my tank.

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Have you replaced the fuel filter? (needs replacement every 30,000 miles), this sounds like a plugged fuel filter.

Posted on Sep 08, 2010

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2006 ford five hundred with P0301 code. Idling rough and has loss of power. New spark plugs (Autolite platinum), coils, EGR. What next? About 1500 miles from home, tools, and mechanic.


cylinder 1 misfire --pull plug and look at it for proper gap- damaged plug -was old plug damaged --check coil for proper working order wire hooked up correctly-wire connection --injector working properly

Aug 02, 2015 | Ford Cars & Trucks

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Power loss and slight juking


Figure if you are running with 7 cylinders firing instead of all 8 you will have a power loss and jerking from the dead cylinder.

You could have a bad injector which a Noide tester will show or a Voltmeter will show on the power wire to #7 injector. For testing the injector, check if it has continuity so if it does get power, it will work.

Usually the Code will show from the Spark circuit failing. Either the plug, coil on plug or wiring can cause the misfire. On some engines access to the plugs is easier. You could change plug 7 to another cylinder or change coil on top to different cylinder without removing the plug. Clear the computer and see if defect moves from one cylinder to another.

If cylinder 7 is still bad with a different coil, you have eliminated the coil as a problem. Then its either the plug or the wire to it.

Apr 12, 2014 | 1997 Ford Expedition

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I have a 2003 Expedition 5.4L Triton. Two days ago, with low gas (38 miles to empty), engine started running rough. Code read P0302, misfire cyl. 2. Since it had 113K miles, I figured its time to change...


Most likely the coils. Easiest way to check is swap them with another cylinder, start it, pull the plug wire connecter and if it doesn't change the engine the coil is bad. If it is the injector, then you can check it with an ohm meter. Touch the leads in the injector it should read 11 to 15 ohms. if you need help let me know.
Randy

Dec 02, 2010 | 2003 Ford Expedition

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I have a 2002 vw beetle with 56,000 miles. Last


MAKE SURE YOUR ENGINE IS WELL TUNED. MAKE SURE TURBO IS WORKING NO RESTRICTED EXHAUST..ALL PLUGS AND WIRES ARE GOOD.SOUND LIKE TRANSMISSION SLIPPING.HAVE TRANSMISSION PRESSURE TESTED.IF FLUID LEVEL GOOD AND TRANSMISSION FILTER NOT STOPPED UP.PROBLEM COULD BE TRANSMISSION SHIFT VALVES OR TRANSMISSION PUMP OUT PUT PRESSURE TOO LOW.

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check your plug wires I had same problem, turned out to be a bad wire.

Aug 01, 2009 | 2003 Mitsubishi Lancer

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P0300 Engine Code Ford ZX2 2002 ZTEC dual over head cam engine. Has 107K miles. Has new plugs, Only thing I really notice is when I turn on AC the car seems to stumble at steady speeds, especially...


P0300 Random Misfire

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

A Random Misfire code usually indicates a vacuum leak or bad gas.

NOTE: If a misfire in a specific cylinder should lead you to check the spark plug, fuel injector and compression.

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optispark distributor fails. go to summitracing.com and search optispark. it'll pop right up

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Loss of power when up to temperature


Sounds like a spark plug wire issue, spray the wires with a fine mist of water and see if it misses.

Nov 03, 2008 | 1991 Mercury Grand Marquis

2 Answers

Loss of power


Do you know how check if every cilinder is working? with the engine in idle, go to the distribuitor cap and carefully unplug one at the time, every cilinder spark plug wire,in the cilinder you dont see a diference in rpm variation, that cilinder is not working, replace spark plug, if you see spark jumping fron the distribuitor cap torch the spark plug wire, another cause to a cilinder fail could be a loss of compression in one or more cilinder

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