Eunos Mk1 engine diagnostics near Southampton?
Discussion
My girlfriend has bought a Eunos which has an occasional missfire. The spark plugs and leads have been changed, I guess it could be a coil pack but wonder if the diagnostic port would help identify the issue? My local garage (and even Mazda main dealer!) don't have the necessary equipment. Any ideas? Thanks
Necessary equipment = a 12V LED and a bent paperclip. Follow this to see if it reports anything:
http://www.miata.net/garage/Engine_Diagnostics.htm...
http://www.miata.net/garage/Engine_Diagnostics.htm...
lilwashu said:
Necessary equipment = a 12V LED and a bent paperclip. Follow this to see if it reports anything:
http://www.miata.net/garage/Engine_Diagnostics.htm...
Thanks, that's a neat idea!http://www.miata.net/garage/Engine_Diagnostics.htm...
How bad is the missfire? Is it occasional - ie could be fuel pressure, or does it run on 3? - tip is with the engine warm/hot exhaust squirt water on the exhaust headers and if it evaporates - ok, if it rolls off then thats the offending cylinder.
If I remember correctly, there were some issues with hight oil pressure which made the hydraulic followers stay open causing a missfire and in some cases non start. Doubt it is this but came to mind.
Recheck the leads for the pin-dot of white powder that highlights arcing as the leads are always the first port of call...
If I remember correctly, there were some issues with hight oil pressure which made the hydraulic followers stay open causing a missfire and in some cases non start. Doubt it is this but came to mind.
Recheck the leads for the pin-dot of white powder that highlights arcing as the leads are always the first port of call...
The missfire is occasional. It doesn't happen every day, but is getting more frequent. It can happen when the car is hot or cold but seems to happen every time my girlfriend drives home from Whitely up the sloping slip road, which is odd. It has now got to the stage where the car actually missfires so badly it stalls and can be hard to restart. The leads have just been changed so I doubt it is caused by them. Thanks.
Sounds like its under load which indicates HT. All the plug ends tight? Sometimes they need a little nip with pliers to get a decent contact. Also check and make sure the leads are fully seated, it will still run if the HT lead is close to the plug but break down if under load.
Did the lead change improve the missfire?
Did the lead change improve the missfire?
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