fast idle

[one_fast_prix]

this is on my 3.1. i took my plenum, tb, egr off to swap out injectors. now the car idles extremely fast. we're talking like 4 grand. no vac. leaks. the plenum's sealed good. swapped chips. WTF??? don't think it's tps or iac as it was fine before.

[GP1138]

Do an idle relearn. Search the FAQ section.

[GOT2B GM]

Double check everything is plugged in (electrical and vacuum)....maybe your PCV hose came off under the plenum?

[one_fast_prix]

i can't do the idle relearn because of the high revs. the car takes off on me with the brake fully depressed.

[one_fast_prix]

everything is hooked up/connected. would the pcv cause the rpms to go up that high? it is connected both under the plenum and on the filter. however the hose on the pcv is a little crooked, but no leaks. had a bitch to get that thing back on for some reason. i couldn't reattach the hose from under the plenum so i had to connect it there first and then shove the hose down through the LIM.

[kuntzie]

well i think matt migt rememer when this happenned to me...............

 

 

injector my friend........... i gaurentee that one isnt siting in right/ or an o-ring is missing... mine reves to about 3500 when this happenned

[one_fast_prix]

i didn't think you could place them in wrong because of the clips? let me know and i'll take everything back off if there is a way i put them in wrong. just want to be sure.

[one_fast_prix]

also when i first installed the 30's and had the plenum and everything off. the idle was very high but more like 3000 instead of 4000 and when i put it in gear it would drop and be fine untill i put it back in park or even neutral. but now after i took it off again earlier today and replaced some lines, that's when it went to like 4 grand and putting it gear did nothing but stay the same and take off on me while having the brake fully depressed.

[kuntzie]

did you tune it for the injectors??

[one_fast_prix]

yes, had a chip burned for it.

[BXX]

Just sounds like your IAC is stuck open... Pull it off and check the pintle position

[slick]

Grab a vacuum guage and check that out.

[1990lumina]

and I personally wouldn't be touching the tranny if it's shooting to 4k rpm

[one_fast_prix]

the iac pintles are good also. someone had mentioned about placing your thumb over a hole when the tb is exposed from the intake, however all i see is an slit opening inside the tb? also just sprayed around everything. no leaks. if it does it while in gear how could it be the iac?

[one_fast_prix]

FUCK!!! now i just also changed the iac and tps for shits and giggles and NOW the car goes to 5000 rpms on startup. i can't take the car anywhere as it is. i don't know what to do with it.

[GutlessSupreme]

99% sure it's a vacuum leak, whether it be an unseated injector, as mentioned, or maybe a damaged gasket or something. Even if the injectors were dumping fuel in there, it wouldn't be reving like that with no leaks and the TB closed.

[one_fast_prix]

now the update:

earlier i took everything back apart just for shits and giggles. either that or it would've just sit. well again everything was fine, o-rings, injectors seated properly. however the only thing i noticed was the pvc hose end where it actually connects to the pcv was connected, but slightly crooked. put everyting back together and walla.

 

NEW PROB:

now the car ran rough for a litttle while and eventually leveled off which is expected, but it' still is around 1500.

[1990lumina]

so it won't level off below 1500?? even when it warms up??

[one_fast_prix]

right.

[Supreme Cutlass]

do a relearn, or reset it with a scanner.