I have to many little projects going on and I think I am currently stuck on this one, so any help will be appreciated.
Ok, I recently just finished replacing a d15b7 in a eg. When starting the car, the engine idles at about 1500-2000 or so rpm. If I let the car warm up, the idle does not drop like it should. I have tryed adjusting the idle screw and checked the timing, but I cant get it to drop. However if I unplug the vacuum hose from the map sensor that connects to the IM, the car will idle normally. When I put the hose back on, the idle jumps back up.
My questions are, is this a problem with the map sensor or possible the TPS? The car has been sitting for a while, (6+ months bought it with a blown engine), could bad gas be causing problmes? Anyone have anything else I should check out or do? I would like to get this problem taken care of as soon as possible so I can get this car back on the road. The Engine is completely stock, there are currently no mods done to this car, so I think that should limit the possible causes. If any addition info is needed just ask. Thanks

 

i would replace the map sensor anyway to make sure it wasn't that and check the plugs for the tps and the idle air control valve make sure they arent crossed cause that happend to me on my first swap i did....

 

Could try this ima having the same problem soo ima give this a shot

https://honda-tech.com/zerothread?id=558236

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skip01 &raquo;</TD></TR><TR><TD CLASS="quote">Could try this ima having the same problem soo ima give this a shot

https://honda-tech.com/zerothread?id=558236</TD></TR></TABLE>

Thanks for the link, I will have to try that out after I get off work tomorrow. If it works, I will let you know

 

Ok, I did adjust the idle control valve, yet the car continues to stay in "fast idle." Here is a strange question, currently I have the exhaust from a vx on the car. would the placement of the cat compared to the normal civic exhaust cause problems? When I check th ecu codes the only code i get is for the O2 sensor (which is unpluged currently)

 

did you get the idle fixxed? my car idles up and down

 

Not yet, I took of the IACV cleaned that out which was REALLY dirty but the problem is still there. I still need to pull of the fast idle valve to clean that out. I just havent had time to do that yet.

 

my car does this to i just had the motor changed, it had a d15 b8 north American in it now i just don't know the timing belt cover was missing, i do know it is a jdm motor but anyway i start it up and it to idles up and down til it warms up. it does not look like it has a fitv so anyway hope you get lined out

 

take off the air intake off the throttle body and start the car, there is a hole before the butterfly put your finger over the hole if the idle evens out you need a new iacv.