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  #1 (permalink)  
Old 23 Nov 2004, 08:38 pm
Caleb
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Default black thingy on distributor?

Can anyone tell me what this black plastic circly thing is on the side
of the distributor with two hoses coming off? i just found out that mine
only has one hose and the other hole is open, perhaps this has something
to do with the high idle speed?
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  #2 (permalink)  
Old 23 Nov 2004, 09:26 pm
jim beam
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Default Re: black thingy on distributor?

Caleb wrote:
> Can anyone tell me what this black plastic circly thing is on the side
> of the distributor with two hoses coming off? i just found out that mine
> only has one hose and the other hole is open, perhaps this has something
> to do with the high idle speed?


based on your detailed description, i'd say it's definitely a....

dude, seriously, help us help you - need to say what make, model, year,
etc. and try to be as specific as possible about the piece you're
describing. all the component diagrams are online, numbered, and
referenced to their names.

if however you want us to use our magical intuititve powers to diagnose
a problem with an unknown "thingy" on an unknown form of vehicle, i'd
say, yes, there's a missing hose, and yes, it is responsible for high
idle speed, when cold. also consider that cars that have an obvious
fudge like this often have other much more serious problems and the
fudge was needed to get it to work well enough for you to want to buy it.

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  #3 (permalink)  
Old 24 Nov 2004, 02:38 am
Randolph
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Default Re: black thingy on distributor?


Caleb wrote:
>
> Can anyone tell me what this black plastic circly thing is on the side
> of the distributor with two hoses coming off? i just found out that mine
> only has one hose and the other hole is open, perhaps this has something
> to do with the high idle speed?


First, let me say that I share Jim Beam's frustration here.

Now for the psychic diagnosis. I see an older car, late 70's or early
80's. Brown metallic with dings in the left front fender and a few rust
spots. Rear license plate has one mounting screw missing. The little
round thingy is vacuum advance for the distributor. There is a missing
hose, and as a result your ignition timing is off as is the air/fuel
mixture. Either could alter your idle speed, as could a host of other
things.

If I am spot on, credit my psychic powers, if I am dead wrong, blame
your poor description.
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  #4 (permalink)  
Old 24 Nov 2004, 06:21 am
Caleb
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Default Re: black thingy on distributor?

Randolph wrote:
> Caleb wrote:
>
>>Can anyone tell me what this black plastic circly thing is on the side
>>of the distributor with two hoses coming off? i just found out that mine
>>only has one hose and the other hole is open, perhaps this has something
>>to do with the high idle speed?

>
>
> First, let me say that I share Jim Beam's frustration here.
>
> Now for the psychic diagnosis. I see an older car, late 70's or early
> 80's. Brown metallic with dings in the left front fender and a few rust
> spots. Rear license plate has one mounting screw missing. The little
> round thingy is vacuum advance for the distributor. There is a missing
> hose, and as a result your ignition timing is off as is the air/fuel
> mixture. Either could alter your idle speed, as could a host of other
> things.
>
> If I am spot on, credit my psychic powers, if I am dead wrong, blame
> your poor description.


Sorry for the lack of info I was in a rush and totally forgot to mention
the car type and whatever else might help. and I must say that was a
fairly good diagnosis. Its an '85 integra 1600 dohc pgm-fi (ZC) 5 spd.
theres only one plastic thingy coming off the distributor with two hoses
on it and a vacuum advancy thingy sounds about right. the tachometer
sometimes jumps around a bit and the car looses power any ideas on that?
when its not happening the engine runs fine and sounds fine but it makes
a rattle/knock sound when the tach bounces and it does it for a good 5 -
10 minutes or so, seems to be intermittent. btw its not just a missing
hose, the part where the hose is supposed to go on the plastic thingy
has been broken/melted or something so ill need a new plastic thingy.
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  #5 (permalink)  
Old 24 Nov 2004, 06:22 am
Caleb
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Posts: n/a
Default Re: black thingy on distributor?

jim beam wrote:
> Caleb wrote:
>
>> Can anyone tell me what this black plastic circly thing is on the side
>> of the distributor with two hoses coming off? i just found out that
>> mine only has one hose and the other hole is open, perhaps this has
>> something to do with the high idle speed?

>
>
> based on your detailed description, i'd say it's definitely a....
>
> dude, seriously, help us help you - need to say what make, model, year,
> etc. and try to be as specific as possible about the piece you're
> describing. all the component diagrams are online, numbered, and
> referenced to their names.
>
> if however you want us to use our magical intuititve powers to diagnose
> a problem with an unknown "thingy" on an unknown form of vehicle, i'd
> say, yes, there's a missing hose, and yes, it is responsible for high
> idle speed, when cold. also consider that cars that have an obvious
> fudge like this often have other much more serious problems and the
> fudge was needed to get it to work well enough for you to want to buy it.
>


It certainly did have a few problems but for $200 it was well worth it,
$100 later it passed WOF (or inspection) whatever you call it and it was
on the road driving beautifully, well almost...
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  #6 (permalink)  
Old 24 Nov 2004, 10:43 pm
Joseph Wind
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Default Re: black thingy on distributor?

Correct me if I'm wrong, but PGM-FI is fuel injected. Integra's did come
with a DOHC-CARB in 85, but the D16A9 (ZC) like the 4th Gen Civic SiR was
PGM-FI. Also it's 1590cc. I don't recall there being an hoses in the side
of the distributor, but there is an external condenser looking part with two
wires going into the distributor. I don't think it's a vacuum advance since
there is no carburetor, but fuel injected.

You may be describing the distributor cap breather. It's the red rubber
looking thing in left center of this picture:
http://www.msdignition.com/np2002/im...n82901_big.jpg Depending on the
manufacturer of the cap it may vary. It would not effect your idle at all.

Check your plugs and wires, for any excessive wear, and replace if
necessary. If it still runs rough, check the distributor and rotor. The
screw that locks the rotor on aftermarket rotors do not fit securely and
loosen easily. The good ones (Honda OE) have Allen screws, not Philips
screws (Bosch). This the most common problem I've seen with these engines.

A rattle/knock could describe other problems, like low octane or a clogged
injector.



"Caleb" <caleb@cet.co.nz> wrote in message
news:f1%od.11221$9A.233126@news.xtra.co.nz...
>
> Sorry for the lack of info I was in a rush and totally forgot to mention
> the car type and whatever else might help. and I must say that was a
> fairly good diagnosis. Its an '85 integra 1600 dohc pgm-fi (ZC) 5 spd.
> theres only one plastic thingy coming off the distributor with two hoses
> on it and a vacuum advancy thingy sounds about right. the tachometer
> sometimes jumps around a bit and the car looses power any ideas on that?
> when its not happening the engine runs fine and sounds fine but it makes
> a rattle/knock sound when the tach bounces and it does it for a good 5 -
> 10 minutes or so, seems to be intermittent. btw its not just a missing
> hose, the part where the hose is supposed to go on the plastic thingy
> has been broken/melted or something so ill need a new plastic thingy.



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  #7 (permalink)  
Old 25 Nov 2004, 01:00 am
Randolph
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Posts: n/a
Default Re: black thingy on distributor?



Joseph Wind wrote:
>
> Correct me if I'm wrong, but PGM-FI is fuel injected. Integra's did come
> with a DOHC-CARB in 85, but the D16A9 (ZC) like the 4th Gen Civic SiR was
> PGM-FI. Also it's 1590cc. I don't recall there being an hoses in the side
> of the distributor, but there is an external condenser looking part with two
> wires going into the distributor. I don't think it's a vacuum advance since
> there is no carburetor, but fuel injected.


There really is no reason a fuel injected car could not have vacuum
advance on the distributor. Specifically, looking up the 1986 (the site
does not show any 85's) Integra 3 door RS with 5 speed manual, 49 states
on http://www.acuraautomotiveparts.com, it shows a distributor with a
vacuum advance and it shows a throttle body and fuel injectors.

> You may be describing the distributor cap breather. It's the red rubber
> looking thing in left center of this picture:
> http://www.msdignition.com/np2002/im...n82901_big.jpg Depending on the
> manufacturer of the cap it may vary. It would not effect your idle at all.
>
> Check your plugs and wires, for any excessive wear, and replace if
> necessary. If it still runs rough, check the distributor and rotor. The
> screw that locks the rotor on aftermarket rotors do not fit securely and
> loosen easily. The good ones (Honda OE) have Allen screws, not Philips
> screws (Bosch). This the most common problem I've seen with these engines.
>
> A rattle/knock could describe other problems, like low octane or a clogged
> injector.
>
> "Caleb" <caleb@cet.co.nz> wrote in message
> news:f1%od.11221$9A.233126@news.xtra.co.nz...
> >
> > Sorry for the lack of info I was in a rush and totally forgot to mention
> > the car type and whatever else might help. and I must say that was a
> > fairly good diagnosis. Its an '85 integra 1600 dohc pgm-fi (ZC) 5 spd.
> > theres only one plastic thingy coming off the distributor with two hoses
> > on it and a vacuum advancy thingy sounds about right. the tachometer
> > sometimes jumps around a bit and the car looses power any ideas on that?
> > when its not happening the engine runs fine and sounds fine but it makes
> > a rattle/knock sound when the tach bounces and it does it for a good 5 -
> > 10 minutes or so, seems to be intermittent. btw its not just a missing
> > hose, the part where the hose is supposed to go on the plastic thingy
> > has been broken/melted or something so ill need a new plastic thingy.

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  #8 (permalink)  
Old 25 Nov 2004, 07:06 am
Burt Squareman
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Posts: n/a
Default Re: black thingy on distributor?

"Caleb" wrote
> Randolph wrote:
> > Caleb wrote:


> Its an '85 integra 1600 dohc pgm-fi (ZC) 5 spd.
> the part where the hose is supposed to go on the plastic thingy
> has been broken/melted or something so ill need a new plastic thingy.


Vacuum Advance Diaphragm; design for power and economy. I've
seen so many of them break off which raises the idle, retards ign,
leans, then pings. DO NOT unplug the vac-hose here. They're used on
Honda/Acura FI or carb from years 85 onto 89. 82 has one but not the
same name but uses one vac-line.



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  #9 (permalink)  
Old 25 Nov 2004, 03:30 pm
Caleb
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Posts: n/a
Default Re: black thingy on distributor?

Burt Squareman wrote:
> "Caleb" wrote
>
>>Randolph wrote:
>>
>>>Caleb wrote:

>
>
>> Its an '85 integra 1600 dohc pgm-fi (ZC) 5 spd.
>>the part where the hose is supposed to go on the plastic thingy
>>has been broken/melted or something so ill need a new plastic thingy.

>
>
> Vacuum Advance Diaphragm; design for power and economy. I've
> seen so many of them break off which raises the idle, retards ign,
> leans, then pings. DO NOT unplug the vac-hose here. They're used on
> Honda/Acura FI or carb from years 85 onto 89. 82 has one but not the
> same name but uses one vac-line.
>
>
>


Ive done some checks, it is a vacuum advance thingy, i got a new
replacement and put it on, now the idle is even higher! but while i was
installing it i notices there was some oil inside the distributor. is
this very bad? Ive checked the cylinder head and all the springs/tappets
are fine. Im going to clean the distributor today and see how that goes.
the oil was not in the part with the spinny plastic thing with the metal
connetcor it was underneath the plastic cover.
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  #10 (permalink)  
Old 25 Nov 2004, 06:41 pm
Burt Squareman
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Posts: n/a
Default Re: black thingy on distributor?

> Burt Squareman wrote:
> > "Caleb" wrote
> > Vacuum Advance Diaphragm; design for power and economy. I've
> > seen so many of them break off which raises the idle, retards ign,
> > leans, then pings.


> Ive done some checks, it is a vacuum advance thingy, i got a new
> replacement and put it on, now the idle is even higher! but while i was
> installing it i notices there was some oil inside the distributor. is
> this very bad? Ive checked the cylinder head and all the springs/tappets
> are fine. Im going to clean the distributor today and see how that goes.
> the oil was not in the part with the spinny plastic thing with the metal
> connetcor it was underneath the plastic cover.


The oil in the distributor may account for the jumpy tach.
The VAD rips open then vacuum sucks oil in from head to
sensors. The reluctor picks up false signals and spikes the
tach. Make sure shaft isn't wobby or sensor connection isn't
saturated with oil.

The idle drops when the hose broke off (and probably a rip
diaphram inside the VAD) the ignition retards then someone
raise the idle mixture to compensate. After the replacement
the timng advances and the idle goes higher. Get a timing gun,
reset the timing, reset ECU (unplug batt,) check for vac leaks
then reset idle. If idle mixuter yellow ink mark isn't tampered
then leave it alone.


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