Post by lowtechguy on Feb 28, 2007 16:25:57 GMT
To reset an ecu, put the key in the ignition set to on but the car not started, disconnect both battery terminals and with a spanner if not enough slack touch them together, this will complete the circuit and remove all electrical energy within your cars ecu (the alternative is to disconnect and leave overnight...).
You then reconnect the battery. you start the car and do not touch the pedals while the engine gets to optimum temperature (wait for the rad fan to come on the second time) you then switch off.
Switch on again and you can drive the car however keep the revs below 4,000rpm for the first 20 miles as you need lambda settings to map the higher rev range... after 20 miles the car is now reset and you can drive it as an italian car should be driven.
(if you thrash from the go, after 4,000rpm the ecu cannot read sensors/the emmissions so will go lean most likely and not good for the life of the engine)
You then reconnect the battery. you start the car and do not touch the pedals while the engine gets to optimum temperature (wait for the rad fan to come on the second time) you then switch off.
Switch on again and you can drive the car however keep the revs below 4,000rpm for the first 20 miles as you need lambda settings to map the higher rev range... after 20 miles the car is now reset and you can drive it as an italian car should be driven.
(if you thrash from the go, after 4,000rpm the ecu cannot read sensors/the emmissions so will go lean most likely and not good for the life of the engine)