idle problems

hatchy94 · Post by **hatchy94** » Tue Oct 23, 2007 7:58 pm

using s300 on jdm b16 in 94 hatch. in the morning when first starting the car it idles at about 1200 for about 15-20 sec then it surges, not a quick surge but a rhythmic between 400-1000, if i dont give it gas the car will die. i have replaced iac, coolant temp sensor, coolant is bled of all air in system, tps is correct. this motor has no fitv. does this have something to do with the basemap values for water temp? im stuck. dont know what else to try.

HELP!!

shiroitenshi · Post by **shiroitenshi** » Wed Oct 24, 2007 12:51 am

I'm not exacly sure from your description of your problem, but that same symptom or having a cycling idle where it bogs and and then IACV compensates, can also occur if you have a valve seat leak. (it's a form of air leak, much like losing air from the manifold/vacuum sources.)

Post by **Spunkster** » Wed Oct 24, 2007 10:06 am

Try completely blocking off the 2 ports under the throttle body.

hatchy94 · Post by **hatchy94** » Sun Oct 28, 2007 10:09 am

arent these coolant passages? where would i reroute these to?

Post by **Spunkster** » Mon Nov 05, 2007 11:28 am

Just loop the hose so that it bypasses it.

The suggestion to block off the 2 ports under the throttle body are diagnostics.

hatchy94 · Post by **hatchy94** » Mon Nov 19, 2007 9:28 pm

ok. what should i be looking for to happen?

peasly23 · Post by **peasly23** » Tue Nov 20, 2007 10:18 am

I have this ALMOST same problem, except that my car doesn't die if I don't give it gas. You need to adjust your Idle via a Helms manual first. Follow those directions and try to get your A/F to be 14.7 while you are setting your idle. Then you can troubleshoot your other problem of surging idle... which is the same thing that's happening to me (read - only when the car is cold)

hatchy94 · Post by **hatchy94** » Mon Nov 26, 2007 4:09 pm

ive tuned the idle to 14.7 already once the car is warm. ill try resetting base idle again.

peasly23 · Post by **peasly23** » Mon Nov 26, 2007 6:41 pm

I fixed my problem by tightening my FITV. Maybe you can look into this for yourself?

inteGReddy · Post by **inteGReddy** » Tue Nov 27, 2007 10:54 am

It might be about time you cleaned the iacv and the fitv. My Integra would always idle at about 2k when cold and I thought it was normal operation until I looked at the coolant temp idle settings in smanager. Cleaning the iacv and fitv fixed all my ilding issues.

hatchy94 · Post by **hatchy94** » Fri Nov 30, 2007 6:50 pm

motor does not have a fitv. and iac is brand new honda piece.