My bikes been missing bad so I pull the plugs clean em take a ride ran good for a couple miles...

Then I buy new plugs same issue ran great for a couple miles the bike only has 10,000 miles...

I'm trying to find this issue asap thanks guys

Oh and the 2 plugs that are getting foul are 2 and 3 thanks

 

what color is the electrode , wet,dry, grey powder color, what year is your f4i

 

cyl 2 n 3 are black n wet 1 n 4 are clean seem to be firing right!!

 

sound like bad coils or atleast weak ones

 

switched coils same plugs went so it's not coils but I might just change em anyways

 

Anyone else having a problem

 

ttt bump

 

Since you already switched the coil and you said it still missed on the same cylinders. i would check the OHM's on the injectors and possible switch those out maybe you have weak injectors. you can try and run injector cleaner through the bike that may work.

 

If you find that the fouled plugs follow the injector then of course you'll need new injectors. Injector cleaner won't do a damn thing, check eBay, I bought a whole throttle body assembly (injectors, tps, map sensor,everything) for 70 bucks. 1 injector cost 108.xx. It sounds like that's your best bet. Good luck

 

thanks man ill keep that in mind... but i think it jump acouple teeth, i always heard that anoying grinding noises at diffrent rpms so i asume its the chain.... having a local guy solve that problem but if its not then ill keep it in mind Thanks

 

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