I'm not 100% sure the air valve is malfunctioning since the car was
running before you retorqued. I was guessing that it had something to
with an electrical connection that got knocked out of place or not
replaced completely.
Since the Air valve only comes into play during warmup, and the car
runs fine once warmed up right????.... Is the idle steady at 950 or so
when warm?( automatic?).
Check to make sure that you are getting 12 volts to the 2 pronged
"Bosch" style connector on the back of the valve and that it is on
there firmly . You should have 12 volts whenever the key is in the run
position.
If you want to make sure the valve is closing disconnect the hoses on
either side so you can see the v shaped hole ( use a small flashlight
or white paper on the opposite side so you can see it better), turn the
key to run (don't start it!), after 3-5 minutes the little v shaped air
passage should close up. If not, either the valve is bad, (not in your
case) or it's not getting 12 volts at the connector.
It could be other things also such as an air leak as others have
suggested, but with mine any sort of air leak kills it completely.
You might want to just check all the bosch connectors around the intake
side of the engine to make sure that they are snug.
It IS possible to tighten the connection on these by very carefully
using a very small jewelers screwdriver to bend the prongs in the cap
closer together. These connections usually don't corrode too much
because of the built in rubber seal around the edge.
Peat
On Jul 12, 2005, at 5:42 PM, Dave Towle wrote:
> Hi Peat,
>
> Yes I have some of the manual but its an old one and as an amateur I
> find it very difficult to use, compared to a normal Haynes or
> something.
>
> So how can I test the auxilary air valve? From what you are saying it
> sounds like I should block off all flow through and see if the cold
> idle problem improves?
>
> Thanks, Dave Towle
>
> --- In peugeot-L@yahoogroups.com, pyoung <bf135@s...> wrote:
>> Dave,
>> Is the auxilary air valve wiring working? It could be that the valve
>> is
>> not being electrically closed when cold but once the manifold gets
>> warm
>> enough heat induction would keep it shut.
>> Do you have the workshop manual for the n9txx engines?
>>
>> Peat
>>
>>
>> On Jul 11, 2005, at 6:12 PM, Dave Towle wrote:
>>
>>> Hi Mike and anyone else who can help,
>>>
>>> - PCV hose looks fine.
>>> - I checked the air intake boot all around with a mirror, couldn't
>>> see
>>> any problems although its hard to see in the folds. I felt around it
>>> too.
>>> - On the thermostat there's 4 individual sensor wires, on these I
>>> polished the prong and tightened up the female side and used a drop
>>> of
>>> VW's Stabilant (discussed on this list a year or two ago as a great
>>> way to improve electrical conections).
>>> - There's also 2 fancy connectors held on by a wire clip, each with 2
>>> small connections inside, all I could do with these tiny things was
>>> make and break the contact a few times hoping that would clean them
>>> up. They looked nice and shiny from the beginning though.
>>> - I assume the air temp sensor is the one in the curved part of the
>>> inlet, I cleaned this up like the individual thermsostat wires above.
>>>
>>> So I did all this stuff and no change to the cold start problem. And
>>> by the way I haven't seen this create any light flashing codes.
>>>
>>> It seems this is likely a problem with the ECU thinking the engine is
>>> warm when it is actually cold, right? Is there any easy way to test
>>> this by convincing the ECU that the engine is cold, like grounding
>>> one
>>> fo the above wires, or directly connecting 2 wires to bypass a
>>> sensor?
>>>
>>> Thanks, Dave Towle
>>>
>>> --- In peugeot-L@yahoogroups.com, "Mike Aube" <maube@i...> wrote:
>>>> Check the PCV hose, air intake boot, from AFM to turbo, all the
>>> electricall
>>>> connections around the thermostat housing and air temp sensor on
>>>> intake
>>>> ----- Original Message -----
>>>> From: "Dave Towle" <davidtowle@m...>
>>>> To: <peugeot-L@yahoogroups.com>
>>>> Sent: Saturday, July 09, 2005 1:09 PM
>>>> Subject: [Peugeot-L] Re: 87 505 N9TE Cold Idle Problem
>>>>
>>>>
>>>>> Hi,
>>>>> The throttle body seal appears good, might have been just replaced
>>>>> (can't remember for sure). To make sure I sprayed ether all around
>>>>> it
>>>>> and the other connections on the manifold and got no audible change
>>>>> in
>>>>> rpm (at idle the whole manifold is under vacuum, right? just
>>> making sure).
>>>>>
>>>>> Any other ideas?
>>>>>
>>>>> Thanks,
>>>>> Dave Towle
>>>>>
>>>>> --- In peugeot-L@yahoogroups.com, <peugeot@m...> wrote:
>>>>>> Take a look at the throttlebody the seal to see if it is sucking
>>> air.
>>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: "Dave Towle" <davidtowle@m...>
>>>>>> To: <peugeot-L@yahoogroups.com>
>>>>>> Sent: Friday, July 08, 2005 4:19 PM
>>>>>> Subject: [Peugeot-L] 87 505 N9TE Cold Idle Problem
>>>>>>
>>>>>>
>>>>>>> I retorqued the head and reset the valve clearances after
>>> Mike Aube
>>>>>>> did a nice job replacing my car's head (among other fixes).
>>>>>>> Unfortunately this has given me 2 new problems, a)oil leaks
>>>>>>> (for
>>>>>>> which the solution is obvious, try again) and b) I lost the
>>> cold idle.
>>>>>>> Each time I try to start the car, everything seems fine at
>>> first with
>>>>>>> the engine going to normal idle speed, then after 4 to 6
>>> seconds the
>>>>>>> speed starts dropping, and it soon stalls once it gets below
>>> 500 rpm.
>>>>>>> Once the engine is warm all is fine.
>>>>>>> Now the only way I could figure out to get the valve cover
>>> on and
>>>>>>> off was by loosening the white plastic gadget on the throttle
>>> plate
>>>>>>> shaft that cradles the throttle wire. When I was done it
>>> seemed to
>>>>>>> only pop into one position so I don't see how I could have
>>> changed its
>>>>>>> alignment or anything, but I'm not 100% sure. I also had to
>>> remove
>>>>>>> one of the 2 screws for the bracket that holds the throttle
>>> cable in
>>>>>>> alignment with the white gadget.
>>>>>>> Any suggestions on what a neophyte can do to trace this
>>> problem out?
>>>>>>>
>>>>>>> TIA,
>>>>>>> Dave Towle
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Received on Tue Jul 12 20:34:51 2005
