Diagnostics On A 1990 Eunos

you need an led (with resistor) and a paper clip.. and a guide to what the codes mean.

this will do the trick:
http://www.autolinkmx5.com/diagnostic-connector-manual-mazda-mx-5-322-p.asp

Thanks for the replies - got one delivered today. Finally got the pesky blighter flashing and it flashes a code 10 - air flow sensor - I'd already put a new one on, so I was a bit stumped. I take it I need to clear the codes to get the ECU reading the sensors again and not using its backup system? Car is still running like a bag of spanners!

correct.. i believe there is a fuse you can pull that will reset it all.. but cant think which 1 it is off the top of my head.

Skuzzle said:

correct.. i believe there is a fuse you can pull that will reset it all.. but cant think which 1 it is off the top of my head.

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Did that - car still running like a bag of crap even though the fault code is cleared. Any ideas? It has always had a chuggy feel and I replaced the air filter as it was black and car has blown ever since. Sounds like exhaust but revs bounce up and down and car tries to stall.