Here's one for you..

[Howard-]

A couple of you may have seen my mention of idle "stutter" when the lights and/or blower fan are on, in this thread:

http://pistonheads.com/gassing/topic.asp?h=0&t...

I'm experiencing similar symptoms, in that when the fan is switched to position 1 (lowest speed), I get idle "droop" - in that when the engine returns to idle, it dips down to about 400rpm, shudders for a split second, and pops back up to it's correct 850-900rpm. It only seems to do it with the lights on, and if the fan is at a higher position, it won't do it.

Pmansion in the above thread mentioned his idle was "sticking", mine isn't doing that, there is absolutely nothing else out of the ordinary with mine, it runs beautifully other than that, and it's not really the end of the world I guess, just very curious!

Any bright ideas anyone?

[Howard-]

Sorry, should have mentioned - done that already, the idle screw didn't change the speed by more than a murmour, but it seemed to help for a while, not that I really noticed the fan's effect cos it was mostly with the lights on!

[Howard-]

Interesting. Why would engaging or disengaging the clutch cause more or less load on the engine? It does it when sitting there in neutral also

[Howard-]

Warm the engine up, join the GND and TEN connectors in the diagnostic connector box, twist the idle screw

[Howard-]

I didn't know that! I've never noticed it, either! I might take a looksie at the switch over the weekend then!

[Howard-]

Well folks..

It does it with the lights on, and fans off. It does it with the lights on, and the fan on position one. But it's fine with the lights on and the fans on position 2, 3 or 4, aka hurricane mode.

Bizarre!

[Howard-]

It's not a huge bother, I just can't help feeling in the back of my mind that near-stalls aren't the best in terms of mechanical sympathy

[Howard-]

Sorry I meant to say it doesn't do it with the lights on and fan off. I think. Or does it? I can't remember Either way it's bizarre, I can't see how the timing would affect it!

[Howard-]

I just bought a timing gun and had a play with the timing. Set it to 14deg BTDC and it might have cured it! Picks up a lot smoother from low revs and has a little bit more grunt now, too!