Idle Issues after Rebuild


Yeh mate checked all the 7.5A fuses. All fine.
 
What are the compressions like ? Are they more or less even across all cylinders ? Also was anything done that could of affected the combustion camber volume in any of the cylinders (this can include valve lapping) ?
 
Rich777 said:
What are the compressions like ? Are they more or less even across all cylinders ? Also was anything done that could of affected the combustion camber volume in any of the cylinders (this can include valve lapping) ?
Click to expand...


Not done a compression test yet as the runs and idle's fine. It's just this dip as the revs are coming back down to idle.

The head is OEM, used OEM gaskets all round. Pistons are genuine honda oversize with genuine rings. Both head and block were lightly skimmed and genuine fully spec'd bearings used.

It's being tuned on Sat so maybe they'll have an idea on what it could be...
 
Might sound stupid, but have you tried bleeding the coolant again?

Do it with the front end jacked up and run the car with the heaters full hot until the fan comes on a few times, front end jacked up with the cap off helps the air out as puts the top of the radiator at the highest point

With the huge koyo radiator on mine i always have to bleed it a couple times to get all the air out, usually doesn't cause much of an idle issue but will cause the revs to drop more than they normally do when coming to a stop if there is still air
 
Hopefully your tuner can smooth it out for you then or point out what it could be. I hate little things like this. :angry2:
 
stevenEK9 said:
Might sound stupid, but have you tried bleeding the coolant again?

Do it with the front end jacked up and run the car with the heaters full hot until the fan comes on a few times, front end jacked up with the cap off helps the air out as puts the top of the radiator at the highest point

With the huge koyo radiator on mine i always have to bleed it a couple times to get all the air out, usually doesn't cause much of an idle issue but will cause the revs to drop more than they normally do when coming to a stop if there is still air
Click to expand...

I'll give anything a go at this stage mate... :((


Rich777 said:
Hopefully your tuner can smooth it out for you then or point out what it could be. I hate little things like this. :angry2:
Click to expand...


Yeh hoping he can shed some light on it... if not at least I will have the hondata there to adjust...
 
Here's normal idle when warm (Fan not on)

3d73443b.jpg


Here's normal idle when warm with IACV unplugged (Fan not on)

12ff6505.jpg
 
stevenEK9 said:
Might sound stupid, but have you tried bleeding the coolant again?

Do it with the front end jacked up and run the car with the heaters full hot until the fan comes on a few times, front end jacked up with the cap off helps the air out as puts the top of the radiator at the highest point

With the huge koyo radiator on mine i always have to bleed it a couple times to get all the air out, usually doesn't cause much of an idle issue but will cause the revs to drop more than they normally do when coming to a stop if there is still air
Click to expand...

Coolant system is self bleeding, just keep topping up the expansion tank and it will sort itself out
 
DV8 said:
Here's normal idle when warm (Fan not on)

3d73443b.jpg


Here's normal idle when warm with IACV unplugged (Fan not on)

12ff6505.jpg
Click to expand...

The revs don't seem to drop at all? idle looks a little low even when the IACV is plugged in
 
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