zetec breathing system help required! :)

Problem or technical question?

zetec breathing system help required! :)

Postby dangerousdave on Sun Dec 27, 2009 8:00 pm

well as most of you will know im having troble getting my zetec turbo running properly, so today i went up to the car and after conecting my crankcase breather to the rockerbox breather and holding my finger over the pipe from the sandwhich plate it ran better and idled at a lower rev range (with the mondeo iscv unplugged) so.....

how does this pipe normally plumb in on the mondeo?
can anyone with the zetec turbo tell me how they have plumbed it in on theres?
have you all used the fiesta iscv as when ever i touched the throttle it just wanted to die on me!

cheers for ant help you guys may be able to throw this way :)

dave
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Re: zetec breathing system help required! :)

Postby black2 on Sun Dec 27, 2009 11:28 pm

Ok mate, mine is just currentky 2.0l na zetec but the breather / vacs are connected as follows :

The breather from the cam cover goes to the air filter.

The vac take off from the sandwhich plate goes to the brather box on the front, and the iscv has no vac take off as you know.

I have read (or im sure i have) that when doing the zt most people block off the vac from the sandwhich plate, just run your breather from the cam cover to the new breather in the block. Sounds like your nearly there just connect up the iscv and plumb the breather correct and it *should* idel ok.
I remember when i done the conversion first of all on mine and I did'nt know where the cam cover oultet went to, before i connected it up to anything as soon as the car came of cold start it would stall, conected that up and its ran fine since.

I will get some pics for you tomorrow mate,

Gareth.
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Re: zetec breathing system help required! :)

Postby dangerousdave on Sun Dec 27, 2009 11:39 pm

nice one buddy, i was wondering if i should put a one way valve on the sandwhich plate with a air filter or something on it? im sure it must be there for a reason so wouldnt want to block it off??

with the iscv unplugged and cam breather conected to the crankcase breather it idled but wanted to stall if i touched the throttle if i plugged the iscv in it revs its funlumps off! i still dont have a bottom hose on my turbo conected but i doubt it needs positive boost to rev a little!

im also wondering if the mondeo iscv is just a pile of s**t and needs a air bypass one on for the frst ecu to read it properly and stop it stalling when i rev it!? if so i need the frst inlet putting on or ill block the front hole up and mill one in the back or side for the frst one to fit!?


cheers for your reply anyway buddy :) not far off like you say :)

dave
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Re: zetec breathing system help required! :)

Postby matty872 on Mon Dec 28, 2009 12:31 am

If you plumb it in as black2 said with the front breather to the sandwich plate it will be fine as on the front breather there is a pcv but you will need a oneway valve near the sandwich plate or when you come on boost you will pressurise the crankcase.
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Re: zetec breathing system help required! :)

Postby dangerousdave on Mon Dec 28, 2009 1:15 am

yeah the only problem is mate i have removed the front one in favor of a core plug :D the turbo sits where it once was!! lol

might sound dumb but whats a pcv mate, and what does it do? just asking as if i find out i can make something to suit and hopefully have her running soon :)

cheers, dave
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Re: zetec breathing system help required! :)

Postby dangerousdave on Mon Dec 28, 2009 1:17 am

.... positive cranck case valve..?? just a thought, lol.....google is your friend....??
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Re: zetec breathing system help required! :)

Postby matty872 on Mon Dec 28, 2009 1:20 am

You must put in a breather in the crankcase that is why its breathing so heavy. a pcv is a valve that stops air flow at idle so the car idle's properly its std on zetecs. or you could vent both to a catch tank.
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Re: zetec breathing system help required! :)

Postby dangerousdave on Mon Dec 28, 2009 1:23 am

matty872 :You must put in a breather in the crankcase that is why its breathing so heavy. a pcv is a valve that stops air flow at idle so the car idle's properly its std on zetecs. or you could vent both to a catch tank.



yeah i have it on the rear mate! sorry i have that simalar to my old cvh one from the rocker to crank case :)



edit, its smaller than the front one tho its around 16mm, should i should i make/buy a catch tank for the pipes to join to? will it be better for the engine??
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Re: zetec breathing system help required! :)

Postby my-first-rst on Mon Dec 28, 2009 10:25 am

i have all the same problems with mine, i ditched the crank breather and just have the one comin off the rocker cover goin to my air filter (not ideal tho as oil get into the inlet) and i have the iscv unplugged because it revs at 3k if connected, its because the engine is sucking the idle valve open,

im givin up on mine and sellin it lol
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Re: zetec breathing system help required! :)

Postby dangerousdave on Mon Dec 28, 2009 11:47 am

lol i will figure it out mate this lad did manage it low-budget-zetec-turbo-guide-vt157933/

i think the trick is to use the frst iscv and tb or just the whole inlet! ??

dont give up pal ill figure it out and let you know!

also isnt running the crankcase with no breather a risk of blowing out your coreplugs?? lol
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Re: zetec breathing system help required! :)

Postby matty872 on Mon Dec 28, 2009 8:37 pm

Yes you need a breather in the bottom end because it build's pressure in the bottom end and stops the oil draining back down to the sump.
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Re: zetec breathing system help required! :)

Postby dangerousdave on Mon Dec 28, 2009 8:48 pm

matty872 :Yes you need a breather in the bottom end because it build's pressure in the bottom end and stops the oil draining back down to the sump.


another good reason! :)

well when i was at the car today i took off the inlet and i am going to machine something so i can fit my frst inlet onto the zetec engine! :)
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