Slight Mis fire

[E30stevief]

Hi all I'm looking for a bit advice I'm wanting to know what the best leads and plugs are the best to stick in my 1990 325i as I had a little hesitation when I but my foot down so I changed plugs but made it worse any help much appreciated thanks Steven

[del777]

Best to stick with original leads and i use ngk plugs which are very good, hesitation can be many things like dirty fuel filter, clogged injectors or distributor rotor worn.

[E30stevief]

Cheers del

[Grrrmachine]

M20 engines do have a bit of hesitation due to the nature of the management system; the vane-style air flow meter doesn't help. Best you can do is give it a good service and get the injectors reconditioned by Injectortune.

Plugs should be BRP6ES, leads should only be BMW.

[E30stevief]

Thank you