like the title says finally got rid of all codes on my friends mpfi swap and the hack job that was left behind from last owner....now car wont idle worth a ****. Like if I hold it at 1500 it stays there as soon as I let it go back down to around 750 it starts surgin like crazy, Like as almost has a vacuum leak somewhere but I search everywhere on it....but also when I take the tps plug off the throttle body shouldn't it change the idle at all???cause when I did it there wasnt no diff with it on or off!

 

check your idler screw. It could be all out of wack. Mine kinda did this once and I just went under there and tweaked it alittle.

 

idler screw is the thing underneath that requires a wrench and allen wrench right...if so I tweak with that and no luck still...

 

check your throttle body gasket mine was fucked one day and it did the same thing.

 

hmm my idler screw just took a flat head screw driver. some may be different though.

 

ya I thought that was what you where talking about and its on top not bottom :-)....I tried to turn mine and it wont move either way!!!been like that forever

 

Hmm , I wanna say your AICV took a shat but you said you had a mess of a mpfi swap so there's alot that could be wrong. Are you sure youve completed the swap right this time around ?

 

yes got rid of all codes finally...what a mess those half *** people do out there!!!someone said idle might be to high causing it to fluctuate???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yz125rider21 &raquo;</TD></TR><TR><TD CLASS="quote">idle might be to high causing it to fluctuate???</TD></TR></TABLE>

i had a bouncy idle in my car after an IM swap. bled the coolant 10 times, checked for vacuum leaks, deleted the fitv, cleaned and replaced the iacv. finally i decided to set the idle to spec (was at 1000 before) and the problem went away.

disconnect the iacv, set the idle to 750-800 rpm. reset the ecu and see if it's better.

 

ok I try that on his car when he comes by tomorrow...