4agte idel problem

[themaleman]

ok i need to know where the lines from my TB go, heres a pic
[img][img]http://img36.imageshack.us/img36/5613/photo348j.th.jpg[/img]

thers 5 i need some info on. the 2 water lines i know about and have been told i dont need them so i have them runing to my turbo instead of the TB.

and what dose this do?

[img][img]http://img46.imageshack.us/img46/7817/photo349.th.jpg[/img]


the engine is a 4agze with sc12 removed, its run by the factory computer and loom. at idel the reves sit around 4000rmp, miles to high! once it has been ideling for a few minutes the reves will drop down to about 1500rmp them jump back up to 4000. i think i have herd that being called 'hunting'

the car runs sweet when its driving and as soon as its in gear and rolling the revs will drop to a normal speed, round 1000rpm

another question i have is dose the position of the TPS effect the ideling?

idealey i think i need some one with a similer setup to come to mine so i can compare vac lines ect

thanks in advance for any help!![/img]

[evil_si]

what model engine you do have small port big port?

what intake manifold are you using?
from memory the ze throttle body doesnt seal properly on the na intake manifolds
need to run na throttle body

[Crampy]

Are the lines open or capped? My 4AGZE MR2 used to hunt when the cold start f*cked out on it. Had to get it bypasse,d which meant having to hold throttle on a bit when cold, but was fine when warm.

Why did you not T the water lines and then send them to the turbo?

[Crampy]

Have you set the TPS correctly? there's heaps of info on here and around the web on how to do it. Only need to set it once and then leave it alone.

[themaleman]

what model engine you do have small port big port?

i think its a smallport, has a cas and i think it was map sensored

what intake manifold are you using?

its a 16v manifold and throtle body

Are the lines open or capped?

i had the two little pipes on the top of the TB looped to eachother, and the other to little pipes on the bottom of the TB looped to eachother, and the big 1 on the bottom capped. i also have the cold start injector unpluged

Have you set the TPS correctly?

no i havnt touched it. i will do a serch on that now and hopfully it can be set with the TB out of the car.


the intake manifold has a fitting in it that splits into 3 vac lines. i have them going to my bov, map sensor/boost gauge and the standard fuel pressure regulator (if thats tge thing on the fuel rail)

[evil_si]

i had a similar problem
with one years ago, some thing didnt quite match up and it had a vaccum leak,

it use brake clean or engine start and spray it around gasket surfaces while its running and see what happens

[rollaholic]

if the TPS hasnt been touched, i wouldnt start

[themaleman]

sumone must know where the pipes cuming out of the TB go??

my main concern are the bottom ones, (except the 2 water ones)

evan a pic of a TB in place would be a help

i had a similar problem
with one years ago, some thing didnt quite match up and it had a vaccum leak,

befor i took the TB off i took the intercooler pipe off at the Tb. made no difference to the idel... now would this indicate that there could be a leek eaither in the Tb gasket and/or the intake manifold gasket??

[evil_si]

its only after the throttle body that matters so taking the intercooler pipe off wont matter

if your worried about the pipes just blank them or link them with a piece of hose.

from your description i think you have a vacuum leak somewere between the throttle body and head

[IH8TEC]

i just ran the water pipes on mine, blanked all the others.

[themaleman]

sweet, im puting the TB back on tomorow with a new gasket,
ive done some searching on here and on the net and still dont quite know how to set the tps corectly. i see on toyspeed theres a few threads with what the reading should be when setting it, but not to much info on exactly how and where to test.

i still need some info on the thing in my second pic and where it should go

[l1ttle_d3vil]

for the TPS, you unplug it and loosen the two screws on the side and adjust it until the resistance is as shown between each terminal with a multimeter. you'll need to suss out which terminal is which on the TPS though.


for throttle body water + vacuum lines:
the little vacuum canister on the side can be removed, just gives it a little extra gas on start up or something. i've removed the whole idleup valve on all my engines and been fine. can be a bit slow starting on standard ecu, but not had a problem with the link g3.

[themaleman]

cheers l1ttle_d3vil thats exactly what i was after.

my car has power steering but my TB dosnt have the idel up pipes,[/quote]

[l1ttle_d3vil]

power steering is on the idle up valve from memory, not the throttle body itself. you'll have to get an idle up valve off a 4age which is running PS.

[themaleman]

ok i just put the TB back on with a new gasket. still ideling way to high. then i blocked up the hole on the inside thats for the idel up (?) and the reves droped down to 2500rmp.

hopfully the place i got my water line jointers froms is open after lunch so i can get a couple of t's and hook the water lines back up to the TB

would you say the tps not being set correctly would be the reason for the remaining high reves?

[matt dunn]

water lines back up to the TB

would you say the tps not being set correctly would be the reason for the remaining high reves?

Probably not no.

[themaleman]

ok time for an update. i have put a TB on with lines for ps idel up. i presume the tps on this 1 should be fine as the engine it was on ran fine.

car sits at 3000rpm, and drops right down when i block up the 'idel up' hole in the TB. so HOPFULLY when i get the water t's tomorow it will fix the idel problem!!