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  #1 (permalink)  
Old 01 Dec 2007, 02:53 pm
Thom
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Default 91 Accord engine started to miss last night

Very odd. the engine started to miss (sounds like one cylinder is not
firing) for about 1 minute. It went away for 5 minutes, then came
back, I replaced the plugs (they didn't look too good anyway), but it
didn't help.

Has anyone run accross this before. My first thought is the plug
wires /dist/rotor, just need to be pointed in the right direction.

Thanks

Thom
91Accord EX, 169,000 miles
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  #2 (permalink)  
Old 01 Dec 2007, 03:09 pm
Elle
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Default Re: 91 Accord engine started to miss last night

You are on the right track. Things you can do to nail this
effectively and economically:

If the wires do poorly on a resistance check, replace. If
you do not understand this, ask away.

If the wires are more than five years old, replace.

How old are the cap and rotor in miles and years? Are they
OEM?

Use only the OEM recommended spark plugs, and only OEM
wires, rotor and cap. These pay for themselves in the long
run. (Believe me, I am cheap and learned the hard way.) They
do make a difference in performance.

Regular poster here "Tegger" has a site with much good
wisdom on it. See in particular
http://www.tegger.com/hondafaq/faq.html#startrun

Elle
Original owner, 1991 Civic, 201k miles

"Thom" <thomcasey@gmail.com> wrote
> Very odd. the engine started to miss (sounds like one
> cylinder is not
> firing) for about 1 minute. It went away for 5 minutes,
> then came
> back, I replaced the plugs (they didn't look too good
> anyway), but it
> didn't help.
>
> Has anyone run accross this before. My first thought is
> the plug
> wires /dist/rotor, just need to be pointed in the right
> direction.



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  #3 (permalink)  
Old 01 Dec 2007, 09:37 pm
motsco_
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Posts: n/a
Default Re: 91 Accord engine started to miss last night

Thom wrote:
> Very odd. the engine started to miss (sounds like one cylinder is not
> firing) for about 1 minute. It went away for 5 minutes, then came
> back, I replaced the plugs (they didn't look too good anyway), but it
> didn't help.
>
> Has anyone run accross this before. My first thought is the plug
> wires /dist/rotor, just need to be pointed in the right direction.
>
> Thanks
>
> Thom
> 91Accord EX, 169,000 miles

----------------------------------

First telltale sign on a '91 might be red rust coating the inside of the
distributor cap. The bearing goes bad and starts leaking dust. When it
seizes, the timing belt breaks and you get a different car.

How often do you use injector cleaner? Might just be a sticking injector
too.

'Curly'
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  #4 (permalink)  
Old 03 Dec 2007, 07:13 am
Tegger
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Default Re: 91 Accord engine started to miss last night

motsco_ <motsco_@interbaun.com> wrote in
news:13l46fi7b2e3edb@corp.supernews.com:

> Thom wrote:
>> Very odd. the engine started to miss (sounds like one cylinder is not
>> firing) for about 1 minute. It went away for 5 minutes, then came
>> back, I replaced the plugs (they didn't look too good anyway), but it
>> didn't help.
>>
>> Has anyone run accross this before. My first thought is the plug
>> wires /dist/rotor, just need to be pointed in the right direction.
>>
>> Thanks
>>
>> Thom
>> 91Accord EX, 169,000 miles

> ----------------------------------
>
> First telltale sign on a '91 might be red rust coating the inside of the
> distributor cap. The bearing goes bad and starts leaking dust. When it
> seizes, the timing belt breaks and you get a different car.
>
> How often do you use injector cleaner? Might just be a sticking injector
> too.
>




That red dust was actually more a '92-and-up problem. The distributor was
changed for '92 to mate with the all-new ECU. It's still worth checking for
red dust, of course...



--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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  #5 (permalink)  
Old 03 Dec 2007, 07:15 am
Tegger
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Posts: n/a
Default Re: 91 Accord engine started to miss last night

Thom <thomcasey@gmail.com> wrote in news:ca65395e-7001-4a58-9f5e-
f3c915fdd175@e67g2000hsc.googlegroups.com:

> Very odd. the engine started to miss (sounds like one cylinder is not
> firing) for about 1 minute. It went away for 5 minutes, then came
> back, I replaced the plugs (they didn't look too good anyway), but it
> didn't help.
>
> Has anyone run accross this before. My first thought is the plug
> wires /dist/rotor, just need to be pointed in the right direction.
>
> Thanks
>
> Thom
> 91Accord EX, 169,000 miles




Is your Check Engine light on?

Have you checked to see what the spark looks like? Is is purply-blue?

How old are the wires, cap and rotor? Are they OEM or aftermarket?


--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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  #6 (permalink)  
Old 07 Dec 2007, 02:35 pm
Thom
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Posts: n/a
Default Re: 91 Accord engine started to miss last night

On Dec 3, 7:15 am, Tegger <teg...@tegger.c0m> wrote:
> Thom <thomca...@gmail.com> wrote in news:ca65395e-7001-4a58-9f5e-
> f3c915fdd...@e67g2000hsc.googlegroups.com:
>
> > Very odd. the engine started to miss (sounds like one cylinder is not
> > firing) for about 1 minute. It went away for 5 minutes, then came
> > back, I replaced the plugs (they didn't look too good anyway), but it
> > didn't help.

>
> > Has anyone run accross this before. My first thought is the plug
> > wires /dist/rotor, just need to be pointed in the right direction.

>
> > Thanks

>
> > Thom
> > 91Accord EX, 169,000 miles

>
> Is your Check Engine light on?
>
> Have you checked to see what the spark looks like? Is is purply-blue?
>
> How old are the wires, cap and rotor? Are they OEM or aftermarket?
>
> --
> Tegger
>
> The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/


Cap and rotor were way old, I assume. Before I bought it. We were
testing the spark on #2 cylinder, when we removed the wire, the car
quit. Either we smoked the distributor, or it doed right there. We
replaced it, and it is back to running bad, but it is running. We
have tested the spark on all the cylinders, it is nice and strong, but
number 2 cylinder is real weak. A compression test has revealed low
to no compression on that cylinder. Looks like we burned a valve or
something.
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  #7 (permalink)  
Old 09 Dec 2007, 10:02 am
Tegger
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Posts: n/a
Default Re: 91 Accord engine started to miss last night

Thom <thomcasey@gmail.com> wrote in news:2ed62107-2bd2-47d3-8c0d-
a7210a721bec@j44g2000hsj.googlegroups.com:


>>
>>

>
> Cap and rotor were way old, I assume. Before I bought it. We were
> testing the spark on #2 cylinder, when we removed the wire, the car
> quit. Either we smoked the distributor, or it doed right there. We
> replaced it, and it is back to running bad, but it is running. We
> have tested the spark on all the cylinders, it is nice and strong, but
> number 2 cylinder is real weak. A compression test has revealed low
> to no compression on that cylinder. Looks like we burned a valve or
> something.





Before you condemn the valves, check their clearances. You might get lucky
and the valve is simply being held open and not yet burnt.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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  #8 (permalink)  
Old 12 Dec 2007, 09:31 am
Thom
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Default Re: 91 Accord engine started to miss last night

On Dec 9, 10:02 am, Tegger <teg...@tegger.c0m> wrote:
> Thom <thomca...@gmail.com> wrote in news:2ed62107-2bd2-47d3-8c0d-
> a7210a721...@j44g2000hsj.googlegroups.com:
>
>
>
> > Cap and rotor were way old, I assume. Before I bought it. We were
> > testing the spark on #2 cylinder, when we removed the wire, the car
> > quit. Either we smoked the distributor, or it doed right there. We
> > replaced it, and it is back to running bad, but it is running. We
> > have tested the spark on all the cylinders, it is nice and strong, but
> > number 2 cylinder is real weak. A compression test has revealed low
> > to no compression on that cylinder. Looks like we burned a valve or
> > something.

>
> Before you condemn the valves, check their clearances. You might get lucky
> and the valve is simply being held open and not yet burnt.
>
> --
> Tegger
>
> The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/


I thought these enginse were interference engines. Wouldn't the
piston slap the valve it it were being held open?
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  #9 (permalink)  
Old 12 Dec 2007, 02:42 pm
Tegger
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Posts: n/a
Default Re: 91 Accord engine started to miss last night

Thom <thomcasey@gmail.com> wrote in
news:9f330651-771b-40e4-a269-a6dd531eb514@i29g2000prf.googlegroups.com:

> On Dec 9, 10:02 am, Tegger <teg...@tegger.c0m> wrote:
>> Thom <thomca...@gmail.com> wrote in news:2ed62107-2bd2-47d3-8c0d-
>> a7210a721...@j44g2000hsj.googlegroups.com:
>>
>>
>>
>> > Cap and rotor were way old, I assume. Before I bought it. We were
>> > testing the spark on #2 cylinder, when we removed the wire, the car
>> > quit. Either we smoked the distributor, or it doed right there.
>> > We replaced it, and it is back to running bad, but it is running.
>> > We have tested the spark on all the cylinders, it is nice and
>> > strong, but number 2 cylinder is real weak. A compression test has
>> > revealed low to no compression on that cylinder. Looks like we
>> > burned a valve or something.

>>
>> Before you condemn the valves, check their clearances. You might get
>> lucky and the valve is simply being held open and not yet burnt.
>>

>
> I thought these enginse were interference engines. Wouldn't the
> piston slap the valve it it were being held open?
>




They /are/ interference engines.

But when I say "held open", I mean by one or two thousandths of an inch.
That's more than enough to cause poor compression and valve burning with no
danger at all of the piston hitting the valve.

Pistons whack the valves when the timing belt breaks, not when the valve
clearances are off.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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