Ok I've kinda narrowed then down a little bit here is what I know so far.

When my radiator fan kicks on, my engine stumbles for a split second then catches itself and continues to idle fine after a few seconds.

in Hondata while data logging, when this stumble happens my ign timing goes from 18 to 21 for that split second before returning to normal.

The stumble will ONLY happen when the fan kick on, the second they kick on the stumble happens.

I just reground the head, stumble still happens but it's a little less pronounce and fixes itself quicker, also the engine doesn't die as much as it did but ign still jumps to 21 for a split second.

I just recently cleaned my negative battery terminal because it was covered in corrosion(that lime green crap) I soaked the negative terminal in baking soda and hot water, it's not corrosion free but it looks copper instead of silver now.

I'm thinking I need to reground the fans But I also noticed that when I roll down both windows at once, the engine pitch changes and I can hear it whine a little more.

The battery has a green eye, but I'm thinking of switching to a lightweight battery anyway, if changing the battery will fix this then I guess I can do that now, but I want to make sure.

I figure it on being 1 or more of 3 things.

new battery terminal, the corrosion on it was pretty bad so it might have just eaten away too much at it.

engine needs more grounds(doubt it does I have like 10 ground wires)

Alternator is dying out, but I'm not sure if this would effect the ignition timing at all though

any suggestions would be appericated

 

I get the same stumble and it drives me nuts. I've got an Odyssey PC925 relocated to the back seat.

Maybe the ELD circuit (electronic load detection)? I need to look more into this.


Modified by Kool-Lude at 6:34 PM 9/21/2007

 

I just noticed that my 92 si does the same thing. And I just got one of those really good batteries(forget the name but they are good for high power audio systems). So it cant be the battery, mabey its the alt???

 

it happens to me also