I have a 1990 sapphire with a eec-iv efi system and with new only
unleaded petrol available in RSA , my car started to jurk when first
riding in morning's ( summer here) or after a long stand "about 3
hours" . checked all connectors I could find cleaned them. after
driving for about 5-10 minutes or 4 km car go as per normal no jurking-
in a carb model it would seem that the choke is not used or the timing
Also about 6 months ago the car started idle uneven going between 800
too 1500 rpm when idling but very intermittend -cleaned the airflow
sensor / air bypass sensor, did not help.
and just to mention had the engine overhauled just before christmas.
Any suggestions or where the self test plug is?