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What Causes Missing/lumpy Idle

ClutchBurndout-:(

By ClutchBurndout-:(,
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ClutchBurndout-:( Grand Master

ClutchBurndout-:(

Posted
Posted

hi guys, my idle is being a bit funny at the moment, it seems a bit lumpy, it sounds like its missing a tiny bit sort of like...

brrrrrbrrrbrrrrrrrrrrrrrrrbrrrrrrrrbrrrrrrrrrrr un eavenly lol, it dosent realy affect usage and its smooth (i think) while driving, but as soon as you stop and idle it starts doing the missing or lumpyness.

i know its not normal, what can cause this? spark plugs being the wrong spacing? i dont think its dirty injectors as ive run a injector cleaner through, is there anything else i can try to fix it? could it be something realy small and overlooked? or is there something large in the works causing this thats going to set me back some money to fix?

any help is apreaciated.

ta

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Dorifta Collaborator

Dorifta

Posted
Posted

Seen its only at idle its more likely to be a coilpack issue. remove coilpack harness one by one, it will misfire, if u dont recieve another misfire ontop of that u have found the cylinder that is misfiring, u can also switch coilpack with another cylinder to confirm ,

replace spark plug/s because they are cheaper, then coilpack if needed

could also be wiring or so on but without knowing exact history and model of car, it could be anything

startt with the above

  • 2 weeks later...
misteR 32 Apprentice

misteR 32

Posted
Posted
hi guys, my idle is being a bit funny at the moment, it seems a bit lumpy, it sounds like its missing a tiny bit sort of like...

brrrrrbrrrbrrrrrrrrrrrrrrrbrrrrrrrrbrrrrrrrrrrr un eavenly lol, it dosent realy affect usage and its smooth (i think) while driving, but as soon as you stop and idle it starts doing the missing or lumpyness.

i know its not normal, what can cause this? spark plugs being the wrong spacing? i dont think its dirty injectors as ive run a injector cleaner through, is there anything else i can try to fix it? could it be something realy small and overlooked? or is there something large in the works causing this thats going to set me back some money to fix?

any help is apreaciated.

ta

Doriftas right on the money man I was a mechanics apprentice for 5 years I found this was generally the answer this problem for pretty much every car that was missing. Good luck :D

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