[Imran]

So i installed my plenum. Now my car surges to 1200 when i start it. It goes like this.

Vrrooooooooom

surge

surge

die.

GTRACER88 said it was probably a leak, so i tightened my hose clamps some more but it's too dark outside to see anything else. What else could it be?

i will spray carb cleaner to see if the idle changes, but then the car won't idle. It keeps dying. so how else do i check?

[Barracuda]

U got a leak somewhere, just gotta find it...sounds like a textbook vacuum leak, check everything u installed and find the culprit (get some light too)...if u r gonna check w/ carb cleaner, make sure u do it when the engine is cold (can cause a fire on hot exhaust/motor) and as for how to do it, maybe have a friend hold it at 1500 rpm's?

[JoshC!]

is your maf pluged in? did you unplug the battery for 15 min and plug it back in?

[Imran]

the battery was left unplugged overnight. the MAF is in.

[HMUSN]

def a vac leak. you missed something.

[Imran]

dammit. i don't want to take everything apart again

so should i just disconnect all the hoses and connect them again? or do i have to remove EVERYTHING that i just put on?

sigh.

[HMUSN]

come on now. It's isn't all that hard to put on a plenum.

[Imran]

no not really. But it took me a day because when i started, it was dark outside, and then i found out that i needed a 10mm deep socket, which i waited till the next day (today) to go out to sears and buy. i guess i'll just poke at it again tomorrow.

Will it eff up my car if i keep trying to start it like that?

[RyanGT]

Probably a vacc leak like everybody said. Do you have a gasket on the plenum to tb? The manifold has a gasket built into it (pretty sure). If you moved the MAF's position it can cause problems. I have to get retuned if i move mine.

+1 to pretty much what everybody said.

[RyanGT]

Wont mess it up... just not great to do. You got all the tools now just tear it all apart and triple check it all. electrical connections should make a slight snap sound.

[Imran]

Originally Posted by RyanGT Probably a vacc leak like everybody said. Do you have a gasket on the plenum to tb? The manifold has a gasket built into it (pretty sure). If you moved the MAF's position it can cause problems. I have to get retuned if i move mine. +1 to pretty much what everybody said.

if all else fails i can find someone to look over what i did.

i swapped the plenum to manifold gasket too, that orange/red rubber band like thing, although my old one was just fine. I swapped all the gaskets. I did remove the cold air intake tube from the MAF.

[BakerFX4]

mine surged bad until i got a tune but It rev'd up and down bad and then the rpms would just hang when i did my tb and plenum.

[Mach Boy]

EGR? I don't know if it has to be removed on a GT.

[Imran]

Its connected to the plenum

[JoshC!]

what kind of plenum did you buy?

[JoshC!]

my last question doesnt really matter i guess. look at the back side of the plenum, there is a hose back there. make sure its plugged in. i could see that as an easy thing to miss.

[Smoothgrandmama]

hmmmm Let's see some pics...and you still have a stock TB right?

[zinc02GT]

Vaccumm leak. Check the one nasty ass hose on the backside of the plenum. That's the most commonly missed one.

[Pittbull]

Nah dood I doubt u have a leak. U kno ur shit I don't think u forgot anything. When I installed my plenum and tb it idle WAY high like urs, around 1200-1300 and I took it to a shop and they adjusted it. So just do that or get a handheld tuner and do it that way. Not a technical problem it's a computor problem

[LGHTNG02GT]

Originally Posted by 00vert my last question doesnt really matter i guess. look at the back side of the plenum, there is a hose back there. make sure its plugged in. i could see that as an easy thing to miss.

yeah, make sure to plug that hole if you dont use it (I know i had to do this on my car)
could also be something with the idle air control ?