Misfire

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CharlesUK
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Misfire

Post by CharlesUK » Fri May 17, 2024 6:31 pm

Have a horrendous misfire underload, started after a tank of e10 so thought that was to blame, two bottles of cata-clean and a fuel filter later and nothings changed :( where to go from here? Spark plugs and wires on their way, am also going to replace TB gasket as I think has a slight leak. What other causes could it be?

cpt black
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Re: Misfire

Post by cpt black » Sat May 18, 2024 8:41 am

Check the dissy cap and rotor for wear but could well be the dissy starting to go they tend to
do it when hot between 2000 rpm/3500 rpm (DONT FORGET TO CHECK CODES)

CharlesUK
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Re: Misfire

Post by CharlesUK » Sat May 18, 2024 6:12 pm

No codes showing, it was misfiring through quite a lot of Revs if full throttle. I have just adjusted TPS and idle and seems to have gotten a bit better. Only went for a short drive so may just act up again. I used the guide on the oracle to adjust it using the fan, it’s off at 0.15mm and on at 0.5mm. Although it also came on at 0.4mm so maybe not precise enough from me?

Charles

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Re: Misfire

Post by cpt black » Sun May 19, 2024 11:30 am

Should be fine but take for a longer run to see it it persists if so dissy etc

CharlesUK
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Re: Misfire

Post by CharlesUK » Sun May 19, 2024 3:36 pm

Think I might have found my culprit :o
Image

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cpt black
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Re: Misfire

Post by cpt black » Mon May 20, 2024 9:31 am

That would certainly cause a misfire ;) Check the terminal on the dissy cap as well

CharlesUK
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Re: Misfire

Post by CharlesUK » Mon May 20, 2024 1:35 pm

cpt black wrote:
Mon May 20, 2024 9:31 am
That would certainly cause a misfire ;) Check the terminal on the dissy cap as well
gave it a brush down and misfire has stopped :D don't know how it got so bad as others are completely fine and it happened overnight. New plugs and leads arriving today anyway, dizzy looks fine to me.

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