Slow idle after clutch replacement.....

[WeeYari]

Originally Posted by sorka

I suppose it's possible that resetting the long term fuel trend when I pulled the battery is exposing an existing issue but I don't think that's it.

When was the battery pulled, and how long has it been running since hooked back up?

An extended battery disconnect will reset the ecu and it then needs to relearn fuel trims. Until it has done so, the car will idle extremely low, to the point of nearly stalling.

[sorka]

Originally Posted by WeeYari

When was the battery pulled, and how long has it been running since hooked back up?

An extended battery disconnect will reset the ecu and it then needs to relearn fuel trims. Until it has done so, the car will idle extremely low, to the point of nearly stalling.

The battery had been out for 4 days.

So after another 5 minutes of driving, the idle actually dropped even further to 440 and engine smoothed and I could hear the slight timing chain slap that I'd noticed before and at about the same speed as before I started the clutch, so I guess it's been doing this before but 440 seems low. After about 10 minutes of driving the long term trends are sticking at about -2%. Wouldn't that indicate a very slightly rich condition and it's leaning it out -2% to make it not rich? i.e. not an air leak after the MAF?