Honda Car Forum


 

Go Back   Honda Car Forum - Accord Parts Civic Tuning Acura Racing > Honda Acura > Honda 2

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 24 May 2008, 05:59 pm
Gib Bogle
Guest
 
Posts: n/a
Default 85 Civic Si idle again

I posted about this a while ago. After it has warmed up the car will
not sit at idle. The revs cycle between about 1200 and 2000 every
second approx. Following suggestions here I drained the radiator and
refilled it with 50/50 coolant/water, and I inspected all the
hoses/lines looking for leaks. Everything looks fine. I also blasted
carb cleaner into the manifold. I have seen suggestions that I need to
inspect the O2 sensor and an idle control valve, but I don't know how to
locate these. The engine layout pictures I've located are from the US,
while this car was sold in Japan, 1.6L engine.
Reply With Quote
  #2 (permalink)  
Old 24 May 2008, 07:26 pm
Gib Bogle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Gib Bogle wrote:
> I posted about this a while ago. After it has warmed up the car will
> not sit at idle. The revs cycle between about 1200 and 2000 every
> second approx. Following suggestions here I drained the radiator and
> refilled it with 50/50 coolant/water, and I inspected all the
> hoses/lines looking for leaks. Everything looks fine. I also blasted
> carb cleaner into the manifold. I have seen suggestions that I need to
> inspect the O2 sensor and an idle control valve, but I don't know how to
> locate these. The engine layout pictures I've located are from the US,
> while this car was sold in Japan, 1.6L engine.


BTW, I'm having trouble finding out the designation of the engine in
this car (because it is a Jap import). It is definitely a Civic Si,
1.6L, DOHC, PGM-FI, and the NZ registration shows it as 1985. On the
tag in the engine compartment, among the Japanese characters I see:
E-AT
AT-1024071
ZC-1032126

The closest match I've found (Wikipedia) is the D16A3 engine, which was
in the 86-89 Acrua Integra, but the fuel control of this engine is OBD-0
MPFI, whatever that is.

I need to know the engine series ID in order to locate an engine
diagram, so I can find the IACV etc.
Reply With Quote
  #3 (permalink)  
Old 24 May 2008, 07:43 pm
Elle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

On Hondas sold in the U.S., the engine type is stamped on
the block, a little below and to the right (as you stand at
the front of the car, facing it) of the distributor housing.
You may have to wipe off old grease to see it. The letters
etc. are around an inch high.

The parts diagrams at bkhondaparts.com may help you find the
IACV.

"Gib Bogle" <bogle@ihug.too.much.spam.co.nz> wrote
> Gib Bogle wrote:
>> I posted about this a while ago. After it has warmed up
>> the car will not sit at idle. The revs cycle between
>> about 1200 and 2000 every second approx. Following
>> suggestions here I drained the radiator and refilled it
>> with 50/50 coolant/water, and I inspected all the
>> hoses/lines looking for leaks. Everything looks fine. I
>> also blasted carb cleaner into the manifold. I have seen
>> suggestions that I need to inspect the O2 sensor and an
>> idle control valve, but I don't know how to locate these.
>> The engine layout pictures I've located are from the US,
>> while this car was sold in Japan, 1.6L engine.

>
> BTW, I'm having trouble finding out the designation of the
> engine in this car (because it is a Jap import). It is
> definitely a Civic Si, 1.6L, DOHC, PGM-FI, and the NZ
> registration shows it as 1985. On the tag in the engine
> compartment, among the Japanese characters I see:
> E-AT
> AT-1024071
> ZC-1032126
>
> The closest match I've found (Wikipedia) is the D16A3
> engine, which was in the 86-89 Acrua Integra, but the fuel
> control of this engine is OBD-0 MPFI, whatever that is.
>
> I need to know the engine series ID in order to locate an
> engine diagram, so I can find the IACV etc.



Reply With Quote
  #4 (permalink)  
Old 24 May 2008, 08:49 pm
mjc13
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Gib Bogle wrote:
> Gib Bogle wrote:
>
>> I posted about this a while ago. After it has warmed up the car will
>> not sit at idle. The revs cycle between about 1200 and 2000 every
>> second approx. Following suggestions here I drained the radiator and
>> refilled it with 50/50 coolant/water, and I inspected all the
>> hoses/lines looking for leaks. Everything looks fine. I also blasted
>> carb cleaner into the manifold. I have seen suggestions that I need
>> to inspect the O2 sensor and an idle control valve, but I don't know
>> how to locate these. The engine layout pictures I've located are from
>> the US, while this car was sold in Japan, 1.6L engine.

>
>
> BTW, I'm having trouble finding out the designation of the engine in
> this car (because it is a Jap import). It is definitely a Civic Si,
> 1.6L, DOHC, PGM-FI, and the NZ registration shows it as 1985. On the
> tag in the engine compartment, among the Japanese characters I see:
> E-AT
> AT-1024071
> ZC-1032126
>
> The closest match I've found (Wikipedia) is the D16A3 engine, which was
> in the 86-89 Acrua Integra, but the fuel control of this engine is OBD-0
> MPFI, whatever that is.
>
> I need to know the engine series ID in order to locate an engine
> diagram, so I can find the IACV etc.



Your engine is not from the car it it's in now. There is no 1985
Civic Si - I had one of the first ones in 1986. They have a
fuel-injected 1.5 litre 12 valve engine. Look for the engine (not
chasis) serial number. A dealer or mechanic can tell you which engine
you have from that.
Reply With Quote
  #5 (permalink)  
Old 24 May 2008, 10:51 pm
Gib Bogle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

mjc13<REMOVETHIS> wrote:
> Gib Bogle wrote:
>> Gib Bogle wrote:
>>
>>> I posted about this a while ago. After it has warmed up the car will
>>> not sit at idle. The revs cycle between about 1200 and 2000 every
>>> second approx. Following suggestions here I drained the radiator and
>>> refilled it with 50/50 coolant/water, and I inspected all the
>>> hoses/lines looking for leaks. Everything looks fine. I also
>>> blasted carb cleaner into the manifold. I have seen suggestions that
>>> I need to inspect the O2 sensor and an idle control valve, but I
>>> don't know how to locate these. The engine layout pictures I've
>>> located are from the US, while this car was sold in Japan, 1.6L engine.

>>
>>
>> BTW, I'm having trouble finding out the designation of the engine in
>> this car (because it is a Jap import). It is definitely a Civic Si,
>> 1.6L, DOHC, PGM-FI, and the NZ registration shows it as 1985. On the
>> tag in the engine compartment, among the Japanese characters I see:
>> E-AT
>> AT-1024071
>> ZC-1032126
>>
>> The closest match I've found (Wikipedia) is the D16A3 engine, which
>> was in the 86-89 Acrua Integra, but the fuel control of this engine is
>> OBD-0 MPFI, whatever that is.
>>
>> I need to know the engine series ID in order to locate an engine
>> diagram, so I can find the IACV etc.

>
>
> Your engine is not from the car it it's in now. There is no 1985
> Civic Si - I had one of the first ones in 1986. They have a
> fuel-injected 1.5 litre 12 valve engine. Look for the engine (not
> chasis) serial number. A dealer or mechanic can tell you which engine
> you have from that.


I think you are probably referring to cars sold in the US. This was
sold in the Japanese domestic market, and imported used to NZ.
According to Wikipedia:

http://en.wikipedia.org/wiki/Honda_Civic_Si

"Honda first adopted the Si badge for the JDM Civic in November of 1984.
Mainly offered in hatchback form (four-door Si's existed but were rare),
the main aesthetic difference was the slight bulge in the hood, which
accommodated for the 1.6-liter I4 DOHC engine. Designated as ZC in Japan
and D16A9 in Europe, the new engine put out 130 hp (97 kW). Since
compact cars at the time typically made less than 100 hp (70 kW), the Si
proved popular amongst tuning enthusiasts.

The United States saw the release of the Civic CRX Si in 1985 with the
Civic Si following in 1986, replacing the Civic 1500S-which shared the
non-fuel injected 1.5 engine as the rest of the Civic lineup. The trim
of the Civic Si was geared toward those who wanted the performance of
the CRX Si, but with four-seats. Standard equipment for the Civic Si
hatchback included a removable glass moonroof, tilt steering wheel, a
full-width taillight panel and color-keyed front airdam and roof spoiler.

Unlike the JDM Si, which had a 130 hp (97 kW) ZC engine, the USDM Si
featured a 1.5-liter, 91 hp (68 kW), 12-valve SOHC engine designated
EW4/D15A3 (the latter code was used for 1987 but with same specs). [1]
The Civic Si also saw a release in New Zealand and Australia in 1987,
and sharing similar specs to the USDM Si."

The ZC number I gave is presumably the engine number, consistent with
other info I've managed to dig out. The engine seems to get referred to
as the ZC DOHC 1.6L. The problem is that although it's easy to get info
about the models sold in the US, this is not true for those sold only in
Japan. I suspect that something similar was sold in Europe, but I don't
know the model name. BTW, the markings on the back of my car say Civic
Si Aerodeck, but Aerodeck usually refers to an Accord model. Mine is a
3-door with a very similar shape to Accord Aerodeck pics I've seen, but
not so long I think.
Reply With Quote
  #6 (permalink)  
Old 24 May 2008, 10:55 pm
Gib Bogle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Elle wrote:
> On Hondas sold in the U.S., the engine type is stamped on
> the block, a little below and to the right (as you stand at
> the front of the car, facing it) of the distributor housing.
> You may have to wipe off old grease to see it. The letters
> etc. are around an inch high.


I've tried to locate the number stamped on the block, but it isn't
possible to see the block because the camshaft housing is wide (this is
DOHC) and there is hardly any clearance between it and the chassis at
the front.

> The parts diagrams at bkhondaparts.com may help you find the
> IACV.


Thanks, I'll have a look. I'm not even 100% sure that this engine has
an IACV, BTW.
Reply With Quote
  #7 (permalink)  
Old 24 May 2008, 10:56 pm
Gib Bogle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Elle wrote:

>
> The parts diagrams at bkhondaparts.com

This doesn't work.
Reply With Quote
  #8 (permalink)  
Old 25 May 2008, 12:04 am
Elle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

"Gib Bogle" <bogle@ihug.too.much.spam.co.nz> wrote
> Elle wrote:
>
>>
>> The parts diagrams at bkhondaparts.com

> This doesn't work.



http://www.bkhondaparts.com/billkay/jsp/home.jsp

Try also the free Factory Service manual linked at
http://www.honda.co.uk/car/owner/workshop.html, under PGM-FI
system.

The 1985 Civic does not have an IACV nor EACV. The 88-92
have an EACV. The 93-95 have an IACV.



Reply With Quote
  #9 (permalink)  
Old 25 May 2008, 04:50 am
mjc13
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Gib Bogle wrote:
> mjc13<REMOVETHIS> wrote:
>
>> Gib Bogle wrote:
>>
>>> Gib Bogle wrote:
>>>
>>>> I posted about this a while ago. After it has warmed up the car
>>>> will not sit at idle. The revs cycle between about 1200 and 2000
>>>> every second approx. Following suggestions here I drained the
>>>> radiator and refilled it with 50/50 coolant/water, and I inspected
>>>> all the hoses/lines looking for leaks. Everything looks fine. I
>>>> also blasted carb cleaner into the manifold. I have seen
>>>> suggestions that I need to inspect the O2 sensor and an idle control
>>>> valve, but I don't know how to locate these. The engine layout
>>>> pictures I've located are from the US, while this car was sold in
>>>> Japan, 1.6L engine.
>>>
>>>
>>>
>>> BTW, I'm having trouble finding out the designation of the engine in
>>> this car (because it is a Jap import). It is definitely a Civic Si,
>>> 1.6L, DOHC, PGM-FI, and the NZ registration shows it as 1985. On the
>>> tag in the engine compartment, among the Japanese characters I see:
>>> E-AT
>>> AT-1024071
>>> ZC-1032126
>>>
>>> The closest match I've found (Wikipedia) is the D16A3 engine, which
>>> was in the 86-89 Acrua Integra, but the fuel control of this engine
>>> is OBD-0 MPFI, whatever that is.
>>>
>>> I need to know the engine series ID in order to locate an engine
>>> diagram, so I can find the IACV etc.

>>
>>
>>
>> Your engine is not from the car it it's in now. There is no 1985
>> Civic Si - I had one of the first ones in 1986. They have a
>> fuel-injected 1.5 litre 12 valve engine. Look for the engine (not
>> chasis) serial number. A dealer or mechanic can tell you which engine
>> you have from that.

>
>
> I think you are probably referring to cars sold in the US. This was
> sold in the Japanese domestic market, and imported used to NZ. According
> to Wikipedia:
>
> http://en.wikipedia.org/wiki/Honda_Civic_Si
>
> "Honda first adopted the Si badge for the JDM Civic in November of 1984.
> Mainly offered in hatchback form (four-door Si's existed but were rare),
> the main aesthetic difference was the slight bulge in the hood, which
> accommodated for the 1.6-liter I4 DOHC engine. Designated as ZC in Japan
> and D16A9 in Europe, the new engine put out 130 hp (97 kW). Since
> compact cars at the time typically made less than 100 hp (70 kW), the Si
> proved popular amongst tuning enthusiasts.
>
> The United States saw the release of the Civic CRX Si in 1985 with the
> Civic Si following in 1986, replacing the Civic 1500S-which shared the
> non-fuel injected 1.5 engine as the rest of the Civic lineup. The trim
> of the Civic Si was geared toward those who wanted the performance of
> the CRX Si, but with four-seats. Standard equipment for the Civic Si
> hatchback included a removable glass moonroof, tilt steering wheel, a
> full-width taillight panel and color-keyed front airdam and roof spoiler.
>
> Unlike the JDM Si, which had a 130 hp (97 kW) ZC engine, the USDM Si
> featured a 1.5-liter, 91 hp (68 kW), 12-valve SOHC engine designated
> EW4/D15A3 (the latter code was used for 1987 but with same specs). [1]
> The Civic Si also saw a release in New Zealand and Australia in 1987,
> and sharing similar specs to the USDM Si."
>
> The ZC number I gave is presumably the engine number, consistent with
> other info I've managed to dig out. The engine seems to get referred to
> as the ZC DOHC 1.6L. The problem is that although it's easy to get info
> about the models sold in the US, this is not true for those sold only in
> Japan. I suspect that something similar was sold in Europe, but I don't
> know the model name. BTW, the markings on the back of my car say Civic
> Si Aerodeck, but Aerodeck usually refers to an Accord model. Mine is a
> 3-door with a very similar shape to Accord Aerodeck pics I've seen, but
> not so long I think.



I stand corrected - I passed over your mention of it being a
Japanese import, or misunderstood...anyway, what Elle wrote about
looking for the engine serial number as stamped on the block, is your
best bet. That will give you the specific engine type.
Reply With Quote
  #10 (permalink)  
Old 25 May 2008, 04:20 pm
Gib Bogle
Guest
 
Posts: n/a
Default Re: 85 Civic Si idle again

Elle wrote:
> "Gib Bogle" <bogle@ihug.too.much.spam.co.nz> wrote
>> Elle wrote:
>>
>>> The parts diagrams at bkhondaparts.com

>> This doesn't work.

>
>
> http://www.bkhondaparts.com/billkay/jsp/home.jsp
>
> Try also the free Factory Service manual linked at
> http://www.honda.co.uk/car/owner/workshop.html, under PGM-FI
> system.
>
> The 1985 Civic does not have an IACV nor EACV. The 88-92
> have an EACV. The 93-95 have an IACV.


Thanks Elle, that's very useful, especially the service manual.

I have (fingers crossed) fixed the cycling idle problem. Following
advice I found online, I screwed down the plastic part inside the FITV
(fast idle thermo valve) and blasting carb cleaner through the small
throat within the main throttle throat (I'm not sure how to refer to
this - it houses the butterfly valve that is directly controlled by the
throttle cable). Now the idle speed is down to about 1000 when hot, a
bit excessive but I can live with it.

There is another problem that I have started to track down, possibly
related to the idle issue. The car runs fine but misses (stutters)
under load. If I accelerate moderately it goes up to motorway speed
without complaint, but under hard acceleration, or up a hill, there is a
lot of misfiring. I'll start by replacing the sparkplugs, then check
the sparks with a timing light. A question: I've seen the PCV mentioned
as a possible factor in misfiring under load. Do you know if the DOHC
ZC has a PCV?

BTW, in my defence, I haven't looked at this car for about 3 years. I
gave it my daughter to use, and she probably didn't want to bother me
with it. Now I have it back again, and want to get it in a fit state to
sell (which I will do reluctantly, because it's a great little car that
I inherited from my dad).

Thanks again.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
1991 accord very bad idle/no idle! brentcole5 Honda Technical 8 18 Sep 2008 08:38 am
idle adjusting screw and idle specs kala Honda 1 0 02 Feb 2006 04:29 am
94 accord High idle when driving, low idle when stopped. Matt Honda 3 3 08 Apr 2005 12:16 am
Sudden high idle, rough idle, gas smell, very poor mileage Richard Honda 3 8 18 Jan 2004 12:53 am
Sudden high idle, rough idle, gas smell, very poor mileage Richard Honda 2 2 18 Jan 2004 12:51 am


All times are GMT -5. The time now is 03:45 pm.


Attribution:
Honda News | Autoblog
Powered by Yahoo Answers




Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
HondaCarForum.com is not affiliated with Honda Motor Company in any way. Honda Motor Company does not sponsor, support, or endorse HondaCarForum.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.