slowB20ej8

whats up im still having idle problems ek it has a jdm b20 when i start it it jumps to about 2000 rpm and doesnt move maybe down to 1500 but goes back up checkd and cleaned my iacv and tightend my fiv replaced my tps and map sensor i had a ls throttle body on swapped out for my jdm b20 one cause the ls one didnt have a fiv on the bottom just the tubes for the hoses looks like all my vaccum lines are ok and i just replaced my head gasket less than a month ago this is annoying as f*** and i need to fix it asap any info would be greatly appreciated thanks.......

instrument

have you tried everything listed here?

and how did you check your vacuum lines? it takes more than a visual inspection.

slowB20ej8

i did a visual check and a physical check of lines every thing seemed to be ok and i tried sparyn some brake cleaner around the vaccum lines to see if the idle would lift

duefuss

did you check your O2 sensor? sometimes that O2 sensor won throw a CEL, and it will mess with everything if its bad......

slowB20ej8

no cel at all

duefuss

check the O2 sensor with a volt meter, my idle did the same and i found out that it was the O2 sensor, no CEL or nothin but i found out by checkin it with a volt meter, now i just need to replace it.

slowB20ej8

ok

slowB20ej8

how would that affect the idle do yo know

duefuss

your ECU monitors the O2 sensor to tell how rich its running a broken O2 sensor or a O2 sensor that gives a weak readout will tell the ecu a low voltage or no voltage at all the ecu reads low or no voltage as lean mixture so it makes the mixture richer ...... so how are you on gas milage????? if its cruddy then i would def test the O2 sensor

court

I had the exact same problem when I put in a b20 in a civic. it turned out that the FITV washer/ gasket thing was leaking air... trip out

bpkmrtoes

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96lsivtech &raquo;</TD></TR><TR><TD CLASS="quote">i tried sparyn some brake cleaner around the vaccum lines to see if the idle would lift </TD></TR></TABLE>

i would also try spraying around the intake manifold gasket, the throttle body gasket, around the fast idle, and around the idle air control.