Misfiring Problem need help ASAP

[jackmul94]

Was driving the mx5 yesterday as it was too good of a day not to, was coming onto the motorway so was picking up speed, then the car started misfiring and died slowly, replaced the battery and it drove ok for 10minutes and started missing again at low revs , not sure what to begin replacing now ? Any suggestions or experiences ? Read up that the leads are a common problem ? Thank you in advance !

[MX5Spares]

Coil;s give a lot of trouble .Also check under passengers carpet, out front near the dash ,as ECU lives there and may be wet /damp.Common problem.We have any parts you need 086 8226506.If its only misfiring its most likely the coil.1.6 or 1.8 ,what year ,several types

[jackmul94]

Thanks Rob, I'll give you a shout next week at some stage, it just keeps miss firing after 2 minutes of driving fine and then will cut out and won't start again then, from what I've read up it seems like coil problem anyway, just wasn't too sure, I'll check the ecu later after work anyway! Cheers! It's a 91 jap na6

[MX5Spares]

Temperature switch on rear of engine may be faulty as its sends signal to ecu re temperature of engine etc.Common enough problem and cheap tp replace maybe 20e new

[sidewaysreilly]

Ignition needs spark testing before you start throwing money at it.
When were the plugs changed /gapped?
When were the leads changed as they are shite?
If they weren't, they have probably loaded the coils too much and POSSIBLY, caused a failure.
A resistance check will verify this but not always.
So, new plugs then leads and if it still misfires resistance check on coils and replace if fecked.
Buy new leads and the best you can afford.

[jackmul94]

Thanks for the replies ! Think I'll start with the small causes like the plugs and ecu and go from there ! Thanks again lads ! Appreciate it !

[sidewaysreilly]

Why ECU? Its the least likely to be at fault.