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 Post subject: Vacume line
PostPosted: 10 May 2010, 21:10 
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Hey Guys...

Does any one have a Diagram of were the vacume lines on the manifold go ?

Im just useing it as a cross reference for my car on wed when i pull them all off and re do them jsut incase they are wrong


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 Post subject: Re: Vacume line
PostPosted: 11 May 2010, 18:53 
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Search there are a few that have been posted

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 Post subject: Re: Vacume line
PostPosted: 11 May 2010, 20:04 
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Actually i cant find any at all mate ?????????


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 Post subject: Re: Vacume line
PostPosted: 11 May 2010, 21:21 
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http://www.cordiapower.com/forum/viewto ... um+diagram

wooooowey took 1 minute :) enjoy

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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 15:38 
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Ima douch lol sorry mate i seriously couldnt find it lol *does the Ncis Head slap*

Well thanx for the diagram mate

I did it all today and got the Rpm to sit stable still goes up and down 100rpm or so

But it is alot smother

But one more question

It surrges when im at say 60khr and its doing my head in i re did all the vacume lines and she is a hell of alot smother and the vac advance on the Dizzy wasnt hooked up but she is now

The surging hasent changed any of that at all so fudged if i know what it is

But i have found that one of the dump pipe Bolts doesnt have a nut and i can hear it leaking But i dont think that would cause the surging

The Airflow meter is working as if i un plug it dies lol


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 15:50 
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the speed dosnt matter so much.... is it in like 2nd gear underboost ?

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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 16:21 
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No boost at all

On boost or under load there is no problem lol

ITs the complete oppersite lolz


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 19:22 
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Ok let me Explain it a little better

Say im at 60ks

And i the idel is at 2300 rpm in 3rd and i keep my foot even just keeping it at that rpm and speed it jolts every few seconds like its wanting to go
Its hard to explain as it doesnt do it under boost
It feels like its a a mis but its not im so confused lol


On a cold start it idels at 1500 rpm which is a normal cold start


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 20:06 
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Xadous wrote:
The Airflow meter is working as if i un plug it dies lol


Sounds like your airflow meter is actually faulty, the service manual actually states:

A quick check of the airflow sensor serviceability is to remove the sensor wiring with the engine at idle. If the sensor is serviceable, the engine speed will drop then return to normal. If no change is noticed in the engine speed, replace the air flow sensor


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 20:30 
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If no change

Well it does change it stalls lol

I have checked for fault codes and there wasnt any for the a/f meter


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 20:38 
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Your car: DOHC 2.3 VR4 85 AB GSR
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If you have zero fault codes the only thing left is to give the engine a thorough service.

It might need plugs, leads, fuel filter, dissy cap and rotor etc.


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 21:16 
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Done all that today lol besides the Rotor

its doing my head in why it would have spiratic idle while sitting still sits around 1000 to 1500 and jumps every so slightly

And while coasting with even presure not going any faster it jolts

So yea ..............................


Has anyone alse had this problem very search i have done its while people are on boost.... not while staying at 60ks or any speed at that matter


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:00 
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Ahh ccrap

Well i think you are right about the AFM

My wife said just try it and the c ar idels almost the same as if the afm was pluged in actualy it idels smoother lol

So Who in brisbane has a Spare working AFM they want to sell me or let me test it with to confirm :D


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:05 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Try driving the car with the AFM disconnected...........see if the problem still exists.

Most cordia's will still drive well but lack acceleration enrichment as the ECU can't read it's airflow and defaults to a common value.

If the problem remains it's not the AFM.


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:09 
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So that means untill on boost it will be sluggish


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:13 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
No not really................the ECU just won't add extra fuel when the throttle is "suddenly" opened.

The car should drive the same, given it's an AC fuel mixtures should be controlled, but if an AB will run a little richer.


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:15 
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Ok well with the AFM pluged in it runs rough with it un pluged it will actually idle smooth if you understand me


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:22 
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Your car: DOHC 2.3 VR4 85 AB GSR
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Sure do..............please.......just drive it and see if the problem exists.......it won't hurt the engine.


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:24 
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Well just went for a drive and it runs shit loads better lol

But my Vac is around 15ish i have replaced all the vac lines so there is no leak

Can the low vac be casued by the dump pipe being loose ?


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 Post subject: Re: Vacume line
PostPosted: 12 May 2010, 22:35 
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Your car: DOHC 2.3 VR4 85 AB GSR
Immaculate Stock 86 AC GSR
Your vac reading isn't that low.............most run around 15 - 20HG............sounds like you have it all sussed, just need an airflow meter.

Most guys when they modify the cordia remove the "honeycomb" in the rear of the sensor in hope for a better airflow, but this disturbs the airflow past the karmen vortex generating rod causing erratic readings in the receiver from the transmitter. I have found this in many cordia's with your problem, including VR4's.

Image

Hope this is useful.


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