Re: Idle Irregularities
Posted: Sun Aug 08, 2010 6:49 am
Hi Romeo,
WOW, You have been busy changing hardware. If you have'nt already done so You and Mel could try the following
1. With the cold start injector disconnected start the engine cold and allow it to warm up at idle. If the problem of falling engine speed and rough running is now worse, then the CSI is probably OK.
2 Repeat #1 this time with the CSI connected and disconnect the aux air valve. Open the throttle a bit to compensate for loss of aux air and allow the engine to warm up at idle. If the idle quality is now better then the aux air could be the problem.
3. Start the engine cold ( everything connected) and allow to warm up at idle monitoring the ignition advance using a strobe lamp. Does the ignition change much when the engine speed changes ( or just before it changes)? If so the problem is ignition related.
Romeo: I don't hold out much hope in changing the ECU. If you have easy access to a spare one then by all means, but typically the ECU either works as it should or it does'nt.
Good Luck,
Brian.
WOW, You have been busy changing hardware. If you have'nt already done so You and Mel could try the following
1. With the cold start injector disconnected start the engine cold and allow it to warm up at idle. If the problem of falling engine speed and rough running is now worse, then the CSI is probably OK.
2 Repeat #1 this time with the CSI connected and disconnect the aux air valve. Open the throttle a bit to compensate for loss of aux air and allow the engine to warm up at idle. If the idle quality is now better then the aux air could be the problem.
3. Start the engine cold ( everything connected) and allow to warm up at idle monitoring the ignition advance using a strobe lamp. Does the ignition change much when the engine speed changes ( or just before it changes)? If so the problem is ignition related.
Romeo: I don't hold out much hope in changing the ECU. If you have easy access to a spare one then by all means, but typically the ECU either works as it should or it does'nt.
Good Luck,
Brian.