Where is the idle adjustment screw?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY »</TD></TR><TR><TD CLASS="quote">Anyone have a pic of it on a 88 crx si? I can't seem to find one. I know it is on the tb but where?</TD></TR></TABLE>
Right on the top of the throttle body. Might have a little green cap on it.
Right on the top of the throttle body. Might have a little green cap on it.
What kind of screw is it? Philip's head? There is something that resembles it but it just looks flat with no place for a screw driver.
It's a flat screw driver type, not philips. The screw is most likely covered with hondabond or something similar, so it can be hard to see sometimes.
Check out this pic...
This picture is off a '92 Civic EX, but the location is the same. #1 on the diagram is the TB idle adjustment screw.
Check out this pic...
This picture is off a '92 Civic EX, but the location is the same. #1 on the diagram is the TB idle adjustment screw.
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY »</TD></TR><TR><TD CLASS="quote">Why does hondabond need to be there? Will it leak something? </TD></TR></TABLE>
Mechanics are supposed to put hondabond, or silicone gasket maker coated on top of the screw, just so it doesn't loosen while the car is running. It's not a big deal at all, I don't have any gunk on my idle screw.
As for the IAT sensor placement, the picture doesn't show the actual sensor, but you can see where it plugs into the I/M. Look at hose #24, where it plugs into the manifold, the IAT sensor is located just to the right of the hose. You can see where it plugs in on the picture....
Mechanics are supposed to put hondabond, or silicone gasket maker coated on top of the screw, just so it doesn't loosen while the car is running. It's not a big deal at all, I don't have any gunk on my idle screw.
As for the IAT sensor placement, the picture doesn't show the actual sensor, but you can see where it plugs into the I/M. Look at hose #24, where it plugs into the manifold, the IAT sensor is located just to the right of the hose. You can see where it plugs in on the picture....
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. S »</TD></TR><TR><TD CLASS="quote">Idle should be 750+-50 rpm, not 800. That's too high.</TD></TR></TABLE>
Uh 750 + or - 50 is 700-800, so 800 is fine. It just should be in that range.
Uh 750 + or - 50 is 700-800, so 800 is fine. It just should be in that range.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blah13 »</TD></TR><TR><TD CLASS="quote">
Uh 750 + or - 50 is 700-800, so 800 is fine. It just should be in that range.</TD></TR></TABLE>
Ok, I'm officially an idiot
Uh 750 + or - 50 is 700-800, so 800 is fine. It just should be in that range.</TD></TR></TABLE>
Ok, I'm officially an idiot
#1 is the idle air mixture adjustment screw; the idle speed adjustment screw is near the cable linkage pulley and is not shown in that diagram. Mess with #1 and you are changing the air, fuel ratio at idle. Yes, it will change your idle speed but only by allowing more or less air to bypass the throttle plate in the TB at idle.
When the #1 screw is turned inwards the engine will be running richer at idle. If you have environmental testing in your location at idle, your hydrocarbon reading may be above a passing level. The idle speed adjustment screw can be found above the red arrows in this picture, change its setting and you will only change the idle speed not the air fuel ratio.

Modified by DB1-R81 at 1:44 AM 7/20/2003
When the #1 screw is turned inwards the engine will be running richer at idle. If you have environmental testing in your location at idle, your hydrocarbon reading may be above a passing level. The idle speed adjustment screw can be found above the red arrows in this picture, change its setting and you will only change the idle speed not the air fuel ratio.

Modified by DB1-R81 at 1:44 AM 7/20/2003
DB1-R81, the idle speed screw your referring to, isn't that the throttle stop screw which the factory manual says should not be changed?
Dude, it's this one.
The one inside the red parenthesis.
BTW, if you like your T/B to look like that AND be 4 mm bigger in bore, email or PM me.
The one inside the red parenthesis.
BTW, if you like your T/B to look like that AND be 4 mm bigger in bore, email or PM me.
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Glocked1
Honda CRX / EF Civic (1988 - 1991)
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Oct 3, 2003 05:13 AM







