Ok well i recently got a 1993 Honda Civic DX and I noticed that it idles really high. I got a cluster with a tach and see that it idles at just about under 2000 rpms. So I think it has something to do with a vacuum leak because there are some hoses that arent connected to anything on the engine. Only problem is that I dont know where they go. I have a picture below that circles the hoses that arent being used and the one just has a bolt in the end of it. So im just wondering if anyone knew where these run too.

 

the metal ones are coolant hoses, why they are not hooked up i dont know, try starting your car, and then adjusting the idle screw on the throttle body, it takes a flat screw driver, turn one way or the other till it idles where you want it, about 700
the rubber one looks like your pcv valve that prolly needs to be hooked up it goes under the intake to a block box on the back of your block

 

thanks man...with the coolant hoses not being hooked up could it be becuase I only have a one fan and a smaller radiator...I will try and adjust the screw on the throttle body then and see if I can find where the other hose runs too...do you by any chance have a picture of where it runs too?

 

I'd be worried about the line that should be connected to your throttle body...

 

is there a sensor that is supposed to go on top of the throttle body? i see one in this picture

http://www.1993-honda-civic.com/imag...hose_03057.jpg

I see what your talking about where does that run too?

 

Yeah, especially considering it goes directly to the map sensor. The sensor in the pic is a throttlebody mounted MAP sensor, found on the '94 - '95 D15B7s, '92 - '93 D15B7s used a MAP sensor mounted on the firewall next to the fuel filter.

 

wow i didnt know about 92-93 on firewall and 94-95 on throttlebody, i knew some were firewall and some throttlebody, good info

 

Thanks for the info guess mine is on the firewall then