fallenfor

i have a 93 4dr civic with a 00sir engine(not jdm). i have no fast idle(which seems to be normal). i changed my iac(still happens),check all my lines about 5 times,checked the pcv,burped my coolant twice,brought it to two garages the people still remain clueless.

when i start the car it stays at 2200RPM,then after 5seconds or so it starts to bounce around from 1100-1900RPM.
someone help...............

ek_99_SiR

have u checked the TPS? my idel was 3000 b/c of a faulty TPS plug

fallenfor

i shall look at that also,but i tried adjusting the screw and it doesn't change anything.

delsolb16

so you dont have an fitv

fallenfor

no,i searched on honda-tech for about an hour or so to see if it was normal,and i found a thread that said that it was. so again I HAVE NO FITV.
as weird as it may seem,its not their,which puzzles me even more to what my problem may be.

EvilPinkEye

try a diffent ecu...and test the map...my **** was off..and when i fixed it..I had to readjust everything else ... get some carb cleaner and spray around the mani-fold for leaks (gaskets and crap) luck man.

fallenfor

yea i sprayed water everywere nothing happened. could a map sensor be causing all this???? ,everyone who ive shown my car too gets confused and it gets me even more confused,and it did this overnight.
i have a vafc,could it have anything to do with it?

egryda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EvilPinkEye &raquo;</TD></TR><TR><TD CLASS="quote">try a diffent ecu....</TD></TR></TABLE> could be a AT ecu

jdmcars.com

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fallenfor &raquo;</TD></TR><TR><TD CLASS="quote">i shall look at that also,but i tried adjusting the screw and it doesn't change anything.</TD></TR></TABLE>

Have you checked the throttle plate itself. Normally if the idle screw has no effect on the adjustment of the idle at all, the t-body plate is held open a little to much. There is another ajustment screw for the plate stop, that may be adjusted wrong.

B18C5-EH2

The simple fact of lacking the Fast Idle Valve will not in itself cause a faulty idle, because neither my B18C5 nor my wife's old B16A2 had one and they idled perfect.

Have you tried swapping ECUs just for giggles?

I know my car doesn't idle as well as it used to since switching from a Kenji P28 to an Uberdata map.

fallenfor

well.... i dont actualy have friends with b series engines,nor do i realy have acess to other ecu's,but do i know a guy with a 2nd gen sir,so maybe ill go see him and try **** out. but other then it being ecu related im looooost.

fallenfor

apart from the ecu..none has any other input on what it could be?

tpr

Have you set your base idle. If not here is the procedure:

1. Warm up the car.
2. Disconnect the IACV.
3. Set the idle, using the idle speed screw (top left of the throttle body viewed from the passenger side of the engine bay), to 500-600 RPM (slow). Reconnect the IACV and then shut it down.'

When you restart the car it should have a stable idle.

philosofy1

i know this might sound crazy, but check your throttle cable. the begin of the week my (B16A) motor had a similar prbolem. would drive fine when i would stop the motor would stay a 1500-2000 rpms. weird, but my cable needed some adjusting, after i adjusted the cable the problem was solved.

just my 2 cents, doesnt hurts to try!

fallenfor

when i turn my idle screw the idle doesnt change....