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Vaccum pipes, ACAV
#1
I need help  Nospeak

I've tried looking for the problem but didn't get anywhere.

I have a question about vacuum hose on the S16

What I have is this :

[Image: SIeZ5vH.jpg]

[Image: OPJxGY0.jpg]

[Image: by2AYCy.jpg]


Is this correct ? I've seen in other threads the vacuum hose are in diferent places, I don't have the metal piping though.

I have a hesitation between 3k and 4k the car has almost no power in that rev range, after that is full power, probably an avac issue ?

I'm asking this because when im almost stoping and I push the clutch in the car sometimes drop revs and stalls. I'm just making sure that is the ICV valve before I buy a new one.

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#2
that's not correct, both actuators go to a solenoid valve, then to a source of vacuum, in this case the vacuum pump.

cloth braided hose is vacuum for the brakes.


map sensor line has a plastic damper on it, not a solenoid.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#3
(17-04-2017, 09:17 PM)welshpug Wrote: that's not correct, both actuators go to a solenoid valve, then to a source of vacuum, in this case the vacuum pump.

cloth braided hose is vacuum for the brakes.


map sensor line has a plastic damper on it, not a solenoid.

Yeah it's a plastic damper

So the actuators should have a T piece right ? Connected to what ?
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#4
the electric solenoid on the end of the head.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#5
I'll try and remember to get some pictures for you later, that's definitely wrong though..
Welding and fabrication projects undertaken, contact me for more information.

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#6
(18-04-2017, 07:27 AM)Jonny81191 Wrote: I'll try and remember to get some pictures for you later, that's definitely wrong though..

I have to buy new hoses though. I always thought something was wrong. I'm trying to mess with "him" after work if I can come home early :\ Probably is better to take off the batery tray to get access to the electric solenoid ?

The fuel pressure regulator should go to where ?

I would very much appreciate that ! Wink
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#7
I saw today, that the fuel pressure regulator is connected in the electric solenoid, that correct ? Then i have a silicone hose that goes from the electric solenoid to a 4 way that connects to the vacuum pump
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#8
ROFL.

no wonder it drives like shit, all that vacuum will make it run very lean when the electric solenoid opens at 1800 rpm.

FPR should be connected to the front of the inlet manifold, and the two actuators teed into that solenoid.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#9
(19-04-2017, 05:39 PM)welshpug Wrote: ROFL.

no wonder it drives like shit, all that vacuum will make it run very lean when the electric solenoid opens at 1800 rpm.

FPR should be connected to the front of the inlet manifold, and the two actuators teed into that solenoid.



F ME Rofl Rofl Now I know why it runs like shit.

And the electric solenoid will connect with a T piece the 2 Actuators and a source of vacuum right ?
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#10
I've drawn this:

[Image: HD7gCBB.jpg]

Is this the correct way to working all good ?
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#11
looks good yes
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#12
Okay, so I've connected everything as it should. What happens to me next is that after 6k RPM loses power almost identical as you hit the red line.

Don't know what to do next tbh

In the electric valve you can connect the vacuum to the ACAV in any way ? Of it has it's own way ?
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#13
Should be a how too around somewhere that I posted years ago

Here you go, although the images don't appear to be working

first of all i hope this helps a few people

PLUMBING IN
the avac is relitilvy simple and easy to use but is often dismissed by those that do not know how it works as being trouble some

im now on over 60k with my s16 in my ownership and its always beign fine!!!!

the control unit aka electro solenid is located on the passenger side of the cylinder head just behind and below the brake vacume pump

[Image: Picture001-1.jpg]


the silver part with the silver pipe coming off it is the vacume pump

the solenoid has three connections on it
1: rear connection closest to bulk head, hose runs up and though bulkhead
2:top branch runs to top of inlet manifold where it joins a t piece, one hose runs to one diaphram other to the other
3: runs across to the front of the inlet manifold, folowing the line of the metal pipe work and goes down to the lowest join on the middle part of the inlet manifold


you then also have two hoses which are on the ecu, the first runs from the ecu t piece to the vent cylinder
this hose joins the rear of the cylinder away from the sticky out part
the other hose closest to the sticky out part runs to the metal pipe that runs across the inlet manifold area.

[Image: Picture085-1.jpg]

DIAGNOSIS

does your s16 suffer from flat spots?
doesnt it perform like you would expect??

if so then look at this guide

CHECK THE OPERATION
are the valves opening and closeing correctly??
1: check all associated pipe work as detailed above for splits/ cracks
2:to check the operation of each diaprham do the follwoing check, remove the hose from one diapram inlet at a time, put your thumb over the end of it and rev the engine, if you feel a suck on your thumb then the pipe work and valve is ok BUT the diapramh is split and cauing the problem
3:if no suck is felt and non of the hoses are split or cracked then the solenoid on the end of the engine is at fault, this is around £25 for a new one from peugeot
4:if you feel suction on each hose then the fault lies with the diaphrams and these should be replaced approx £45 each from peugeot


SETTING UP
1:to aid the succesful running of the car and to ensure no flat spots then the bars from the diaprham to the cam need to be set correctly to ensure they open and close fully.

2:if they dont open/close fully then you need to disconet the the hose from each in turn, remove the two 10mm bolts that hold them to the bracket and flick the ball joint off the cam so as you can adjust it.

3:grip the metal shaft securely and gently tuen the ball joint on the thread, be very carful they are fragile and if you break one you have to buy a complete unit, adjust it up or down until the cam (triangulat part ) is resting on the stop on the manifold at rest and opens through 90 deg when working.

[Image: Picture086-1.jpg]

Frosty did you ever put this on the forum?shouldnt look like that if opening properly

hope this helps a few people
and if you have a cracked hose i always have them for sale
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#14
What I have is this:

Where it says "nothing connected" I have a plug there

Btw my S16 is a LHD, so the rear connetion goes where ?

I belive this will be a pain in the arse xD

   
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#15
it should just be vented i believe
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#16
So, I think i've sort this out.

I've connected the vacuum pipes like this on the electro valve:

[Image: K0gswn2.jpg]

The acav is connected to there because the pipe it has more vaccum and I would assume that's correct because now the car feels really good low rpm, no flat spot between 3k and 4k rpm and goes all the way to red line.

The temperatures have gone down significantly. crussing in tow it's not hitting 90ºC on the gauge it's about 80ºC

Still correct me if I'm going something wrong.
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#17
running lean will make the engine run hot which you have fixed so its normal for temperatures to be lower, thermostat is 83 degrees so that's about right.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.
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#18
Have you got face book mate i know a guy who can help you out i took all that off mine but a mate of mine has a mint one
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#19
(13-05-2017, 01:11 PM)welshpug Wrote: running lean will make the engine run hot which you have fixed so its normal for temperatures to be lower, thermostat is 83 degrees so that's about right.

I hope it stays this way, and thank you so much to everyone in advance

(14-05-2017, 08:05 PM)spillage Wrote: Have you got face book mate i know a guy  who can help you out i took all that off mine but a mate of mine has a mint one

Yes I have mate, I Pm'd you the details.

You swaped for the gti6 manifold ?
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