Question about Volvo V40

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Coil pack that attaches to ht leads 1 x4 & 3 x 2 what do they do, my car is misfireing how do i know which one to replace ????/

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Take to local part store they can diagnose for free ,and give you a print out

Posted on May 20, 2011

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Mercedes Benz c230 w202 is have misfire so how to fix It when I run the car after 50 to 100 meters or sometimes during the starting get to misfire and I was change the fuel pump but its still misfire, any...


This car has coil packs which connect to each spark plug.the spark plugs sit deep under the top cover and need a special plug spanner to remove as the access is narrow and deep.

first check the condition of each plug....replace which the correct type ....make sure they are the correct gap...do not over tighten just a quarter turn after they bite.....run car engine .....if it still misfires then you need to replace the ht leads ....swop them with a new set.....if still misfires then it's the coil packs which are the most expensive part of replacement.i sourced mine on eBay.hope this is of help.as this is electronic ignition the misfire is most likely due to 1. Dirty plugs with incorrect gaps....2.faulty ht leads.... 3. Faulty coil packs....4. Incorrect timing.

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SOUNDS LIKE THE COIL PACK OR THE WIRING CONNECTIONS ON OR TO THE COIL PACK .aLSO CHECK THE HT LEADS ON EARLIER MODELS ,LATER MODELS HAVE A COIL PACK ON EACH SPARK PLUG .MODERN TECHNOLOGY

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a misfire on cylinder number 3. could be a dodgy spark plug, HT lead or coil pack/ distributor hope this helps

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