engine misfiring 2.5l petrol automatic 1994/5 rialta

[kobefred]

Hi, engine recently started to misfire. Sometimes it clears after a while. I was told it may be duff battery as I also have had some starting issues and with headlights on as a test, they do dim dramatically on startup.


I have searched about this problem and some folk never get to the bottom of it even after cleaning the plugs, injectors, dewatering the petrol tank etc etc.


Anyone have any suggestions?


Also anyone recommend what type/make of battery would be best to replace old one which is probably well over 5 years old?

[bbaskett]

In addtion to changing the plugs, I would also change the plug wires as this could be the culprit.