Hi I've Got A 2002 Ford Focus St170 Was All Running Fine But Last Night I Changed The Battery

[Evans1510]

I changed the battery as the one that was on it was not powerful enough so I bought a second hand battery off a diesel car and put that on now since I've put that battery the engine management light is on and it's misfiring anyone know what's wrong ??

Thanks

[StanH]

For a starting point, have you tried putting the original battery back?

Stan

[Evans1510]

Hi yea I've put original battery back but eml is still on but car is slightly running rough so if I needed a set of spark plugs would that cause the eml to stay on ?

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[luke.grimbley]

Could be the coil pack or plugs. Wouldn't expect a battery to cause a misfire. Double check wire and connections near the battery were not knocked loose.

[Evans1510]

Would u know anyone who would want to buy my st170 5 door on 52reg full leather heated seats very clean inside and out ?

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[Evans1510]

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