So this is my first post on this sight being a new member!! I have been reading around and you guys seem very helpfull!! I have a 93 civic hatchback with a d15z with a d16z v-tec head, I am using a del sol vtec ecu. Vtec works fine but the stinking car idles at 2,000 all the time, The check light don't come on all the time but it does come on sometimes. Here are the codes
43=fuel supply system
13=baro- atmospheric pressure sensor
7= throttle position sensor
14= idle air control

I have checked for vacuum leaks and found the throttle body gasket was bad, so I replaced it, that brought the rpms down to 1,800-1,500. I pulled the intake of and put my fingers over the iac and the fast idle valve holes in the throttle body but it don't lower the rpm's???

Please help I hope I have given you enough info

 

definately does sound like an air leak, have the same EXACT problem with my ford probe

It's an air leak someplace...where...I don't know, but it definately sounds as though it's sucking air..

 

Thats what I thought but I checked out everything, if their is a leak I can't find it??? Any ideas on what I could do????

 

I Don,t Really understand how u can see wich error I got? I Mean How Can I Know I got error 43 or 14?

 

Mario: https://honda-tech.com/zerothread/1171263

Anyway, take off your iacv and try to clean it out. Are you sure the wiring isn't messed up? Things are plugged in?

Spray fuel injection system cleaner around all the places you could have a vacuum leak and see if it changes the idle at any of them.

I had a bad pcv valve which gave me a super leak!

 

check all your vaccum hoses and then if that checks out then check your map sensor and all the plugs around the intake mani.. their are a couple that can get mixed up...

 

check wiring diagrams and make sure you have the correct sensor plugged into the map sensor is what i originally meant.

 

you can also use carb cleaner to find your leak.. spray it around your throttle body and between the intake mani/head.. if the car idles up or dies then you know you have a faulty gasket..