High idle and now no-start.....(xenocron help, maybe?)
 

95 civic hatch
d16z6, fresh rebuild (tt rods, srp pistions, je rings, acl bearings, t3/t4 .57 trim 60/63, GE block guard, new timing belt, new water pump, new oiil pump, etc...)
crome basemap from xenocron
2.5 bar map
Walbro 255
No CEL

I haven't driven my car since I got it running (last summer), since I just want to get the project completely finished before I drive it, so the engine has been ran for a total of probably 45 minutes since the rebuild last spring. Car runs like a champ, 60 psi oil pressure, 18 in/hg vacuum, but retarded high idle. Ever since I got it running it's had an 1800 rpm idle. Today I decided to try and figure it out...I swapped out the IAC with one I had laying in my garage, same thing. I tried to disconnect the MAP to see if that would drop the idle, and the car wouldn't start at all, just cranked and bucked a little, but wouldn't actually start and run. I reconnected the MAP and now the car starts, revs up to 3500ish then dies. Ever since the start/die problem the IAC makes a high pitched whining noise any time the key is on. I'm going to put the old IAC back on in the morning and see if it will at least run again (and not whine). I'm also going to double check my MAP wiring and check my TPS. Other than this does anyone have any other ideas?

Re: High idle and now no-start.....(xenocron help, maybe?)
 

What's the question again?

Re: High idle and now no-start.....(xenocron help, maybe?)
 

The question is does anyone have any ideas as to what else to check.

Put the old IAC back on, map and tps both check out good. car still starts and dies.

Re: High idle and now no-start.....(xenocron help, maybe?)
 

any chance you have the tps and map switched?

Re: High idle and now no-start.....(xenocron help, maybe?)
 

mabey not enough fuel after initial cranking how warm is it where you are

Re: High idle and now no-start.....(xenocron help, maybe?)
 

yeah thats probably it same problem plagued me then i switched em.

Re: High idle and now no-start.....(xenocron help, maybe?)
 

wow, people responded and i didn't notice....

tps and map aren't switched. it's 60-70 degress here.

Re: High idle and now no-start.....(xenocron help, maybe?)
 

thats wierd my car only acts up when its like 80-90 but crome dl my air temps at almost 100-110 and my sensor is in the intake pipe not the manifold

Re: High idle and now no-start.....(xenocron help, maybe?)
 

Fast Idle Control Valve, take it apart and there should be a plastic piece in there that overtime unscrews itself, take a flat head and screw it back in, put it back together try it out.