did a b16 swap and when i turn the key it idles at like 3000 then i get a erratic idle after it runs for a while, sugestions?

 

check vac diagrams.

 

checked many times, and also copyd another b16 one

 

vac. leaks?

 

Check your throttle plate for something keeping it open. Then if theres nothing plug the holes in the tb that are b4 the plate. the top hole is for IACV the bottom is for the FITV.

 

Try removing the Thermo Vacum valve that is on the intake manifold or on the bottom of the Throttlebody.A plastic threaded plug that has a copper valve and thermo spring to adjust cold idle till warmup.Its the one that has a water line coming in and out.Remove the cover being held by two phillips screws.Then you will see this white plug backed out.Im suprised no one has ever thought of this instead of replaceing the whole TB.

 

actually thats the IACV (Intake Air Control Valve)....that plastic piece gets sprung and causes a bad idle from tiem to time....screw it back in...clean it up really nice before re-installing and that should fix your problem. BTW..double check the hoses...while they may be in the right places...if they are cracked, torn or broken in any way...they will still leak...hth

 

actually i thought it was called the fitv? o well i took it off yesterday and it wasnt popped out so i put it back...like it was in there but is there anything i should do to it even if it looks ok?

 

ok i fixed the fitv and at cold there is no erratic idle and the idle is good but when warm it the fluctuating idle starts up...

 

try turning the throttle screw back down i thought i just answered this

DEF

 

haha, yeah im going to try that, where abouts is it? , also i am going to try a different eacv

 

you have a bad tps or you have to re cal. it with a ohms meter , i had the same prob. as you.

 

yeah i am going to screw around with the tps tonight, i changed the eacv but still does the same thing

 

did u check the throttle plate?

 

yeah i did and it was all the way closed

 

did you screw the fitv back in tight when you put it back in?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wpgcivic &raquo;</TD></TR><TR><TD CLASS="quote">yeah i did and it was all the way closed</TD></TR></TABLE>

did u cover the two holes?

 

oh yeah, i covered the top one and it died, then i covered the bottom one and it was fine, what does this mean?

 

If i remember correctly, there is a plug on the rear of the intake manifold, and a plug similar to it somewhere on back of the block...i need ot look to be sure, but regardless...make sure these plaugs havent been switched. They are the same plug size and shape, and whn they get crossed it can cause an akward idol. Thats what happened when we did the last swap in my car. After we switched them back...it purred like a kitten

 

well if they were switched would i have gotten a code on the ecu?

 

well than, lol, turned out that my throttle body gasket was **** and torn, thx a million for the help guys