Question about 2001 Volvo S60

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I have a Volvo S40, I've changed the wires that connect to the spark plugs; I put new iriduim plugs in, added fuel injection cleaner and the car continues to misfire. I hate to take it to my local Volvo dealer because they gave me erroneous information and it seems they just want to charge me exhortbitant amounts for repairs.

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  • 76 Answers

You may have a bad ignition coil or possibly a bad coolant temp. sensor. You can check for a bad coil by removing the covers for the plugs and gently lift the individual spark plug wires from the plugs while the engine is running. With the wires lifted off the plugs a small amount you should hear the spark making a ticking noise. If you lift it to far it could seriously shock you so be carefull.

If it's a bad temp. sensor the dealer will have to monitor the sensor and check it with a non conotact thermometer to verify it is correct.

Posted on Feb 28, 2009

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My 2003 volvo s40 won't start but turns over. What could be the problem. I know I needed a thermostat but the engine is not over heating. I changed the fuel pump fuse.


check see if your getting spark first use a screw driver inside one of the plug wires if it sparks your getting spark if its not you probly have a bad coil or distributor or plug could also be a timing chain issue with them they are known for that also

Nov 26, 2014 | 2003 Volvo S40

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What would cause engine code PO306, #6 cylinder misfire?


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How to fix a 2001 volvo s40 misfire on the third spark plug and how and were can i get a new spark plug wiring?


Hi I think you have inderpendent coils you will have to get them from g.s.f or euro car parts

Jul 21, 2014 | 2001 Volvo S40

1 Answer

I just put new spark plugs in yesterday and it's still idling low... how do I increase the idle?


You now have to remove the spark plugs

Look up what is supposed to be in the engine
& compare to what was put in

Then correct any gap issues,use a small amount of
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Then see if the idle improves

I would change any O2 Sensors with 100,000 miles on them

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1 Answer

How do I change the spark plugs on a 2006 volvo s40?


Remove the plastic cover that is to the oil filler cap , it will a torx bit. Be careful when removing the Spark plug wires the coils are connected to them and they are bolted down. You will need a 8" extension to get the plugs out, I think you will need a 5/8 spark plug socket. Remove one old plug at a time and install new one this way none of the coils/plugs get mixed up.Good Luck Tim

Nov 20, 2010 | 2006 Volvo S40

1 Answer

Cylinder four continues to misfire after replacing , spark plug, wire has been checked for spark, new fuel and air filter have been changed, fuel injection cleaner added to high octane fuel, check...


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sounds like a spark plug/ spark plug wire problem. i would change the plugs and wires this is a cheap fix and can be done with little effort.

Mar 30, 2009 | 1999 Honda Civic

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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1 Answer

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Jul 17, 2008 | 2000 Volvo S40

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