MildWater

I just finished my Y8 manifold swap on my Y7, but now for some reason my idle goes way high, then back down, and it just keeps doing that...

any ideas why?

GarageAlchemist

lol.. you didn't double check your work. you have a vacum leak, or one of your sensors mixed up.

did you clean the gasket mating surface till it was spotless... did you replace all the gaskets.. did you label your sensors, did you double check your vacum lines replacing all of them(10 bucks at autozone)...

95hatchcivic

yo man i had the same troubles in a different situation..anyways my idle was going from 1000-1700...up and down and up aqnd down..so embarrising, looks like ur a fool in traffic. K LISTEN UP! I cleaned my IACV(didnt help) cleaned the FICV(didnt help) had no vaccuum leaks (checked with propane) and also made sure i had a new TB gasket and scraped the old **** off.. i was SO MAD i couldnt find the problem. Tried out a different TB (one from a b16 that has no FICV) and the car purred like a mother faAkin kitten. so what I did was get a new FICV from the junkers..turns out my old one went bad (even tho i cleaned it out and all the fixins)

Luserkid

What year intake manifold is it? As you could see theres many things that could be wrong, but main thing is you have a vac. leak somewhere.

MildWater

its an auto manifold from a older 96-98, cuz i didnt see any of those air injector holes on the manifold

Luserkid

What throttle body are you using? Also did you use a new throttle body gasket?

Bense

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">What year intake manifold is it? As you could see theres many things that could be wrong, but main thing is you have a vac. leak somewhere. </TD></TR></TABLE>

does the 99-00 y7 have that air injection stuff?

big-cat

1. did u take all of the old gasket off of the head?
2. are u 100% sure u hooked up your wires and plugs right?
3.are u sure u hooked up all of your hoses up right and they have little clamps on them?

haveaniceday

Start the car and run the heat (yes heat) on full blast for a few mins. Gets the air out of the coolant. Also reset the ecu.

Also I didnt read all the posts. But, does it do this just on a cold start up? Then once it warms up everything is fine?

joker4096

try switching the tps and map wires, if not you have a vac leak or bad IACV.

95hatchcivic

i told you how to fix it, follow my post dummy

MildWater

ill try all those things in the morning... thanks for all your help

I might have gotten some vacuum lines crossed or something....

also.... there's a little nipple in the back bottom right of the intake manifold...does it connect to something or do i just plug it up?

haveaniceday

On the bottom right if your standing in front of the car? Thats the cruise control nipple yes plug it up.

EE_Chris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MildWater &raquo;</TD></TR><TR><TD CLASS="quote">also.... there's a little nipple in the back bottom right of the intake manifold...does it connect to something or do i just plug it up?</TD></TR></TABLE>

If that nipple didn't connect to 'something' and you didn't cap it off, that's a vacuum leak and will cause the idle to hunt.

GarageAlchemist

thats for the cruise control crap *i think* but i really doubt thats where the surging idle is from, he just didn't clean the gasket surface, or mixed the sensor wires

i wanna see what it is now, he better follow this ******* thread up.. lol

MildWater

lol i turned my car on and put my finger on that cruise control nipple....i think thats it

im making a plug out of a hose and some glue..lets see if it works

MildWater

kk. I plugged it up using my ultra original nipple plugger thingy and took it for a test drive....

No more weird idle!!!!

It seems to me my temp guage goes up faster from a cold start....or maybe its cuz its getting warmer outside?

big-cat

yeah that would deff be it, very nice problem solved, doesnt feel any differ does it?

i did mine and had a vac leak and was going to fix it but then my dad(i was 16 at the time) was like u dont know what the *** your doing your fukin up your car and i am taking it in to a professional. 1g later out of my own pocket and i still had to fix little things, and didnt feel a differ, expletive MECHANICS.

MildWater

If i have the vacuum lines wrong or something, would that cause my engine to heat up more\faster? cuz i noticed my engine is getting hot when i touch it but the temp gauge says its normal.

MildWater

bump for an answer...

EE_Chris

The water temp is regulated to something like 180-190*F. The engine itself is probably a little hotter. When was the last time you could stand touching metal that hot?

Did you re-bleed the coolant system?

MildWater

naw i didnt...ill prolly change my radiator fluid this weekend or something.