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  #1 (permalink)  
Old 29 Oct 2004, 12:09 am
disallow
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Default Mileage issues on 98 Civic

I replaced my cap, rotor, and PCV valve with Honda parts about 4
weeks ago on my 98 civic 5spd (205000kms). I noticed a big difference in
acceleration. So I gave myself a week to enjoy the newfound peppiness,
and then started driving normally again.

However, even after resuming normal driving, my mileage is definitely
worse than it was before.

Before I got easily to 1/2 tank (23-25 liter fillup) and the trip
Odometer would read between 270 and 330kms depending on the driving mix.
(usually about 50/50 city/hwy) Now I get to about 260kms tops on the same
amount of fuel and driving ratio.

It is a little cooler out now than in summer, but its still above
freezing, so the mileage decrease experienced from the cold should not be
a huge factor yet.

I thought maybe my plug wires (about 2.5 years old) were bad. I did
an Ohm check on them, they are all around 3000 - 6000 ohms. My #3 wire
didn't even register any resistance. Could that be a problem? I pulled
that wire while the car was running, and there is definitely spark going
to the #3 cylinder.

So there definitely doesn't seem to be any problems with the
wires, but that it doesn't register resistance I thought was kinda weird.
Also, if there was a huge problem with #3, wouldn't I get a Check engine
light?

I also replaced my spark plugs last March with NGK plugs from a
Reputable parts store. I looked at them today, and they still look fine.

So no probs there.

Also, when I did the PCV valve, I noticed that the old one (which
Has probably never been replaced) was still functioning perfectly. A
Little gummed up, but still had that rattle when I shook it.

In my previous experiences, when a part is replaced due to wearing
out, generally the problem shifts to another problem part, until you
replace everything and it finally works properly. In this case, I'm
pretty sure I've done everything I can. Am I missing anything?


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  #2 (permalink)  
Old 29 Oct 2004, 01:49 pm
chris
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Posts: n/a
Default Re: Mileage issues on 98 Civic

I would replace the sparkplugs wires with OEM ones. Since you found a
problem with #3.

I would also consider an E-test to comfirm that your engine is running
correctly.

Are you new SP gapped correctly ?

chris



"disallow" <loewen_t at yahoo.ca @> wrote in message
news:3e8d09d326f888c6603cdbe735686df6@localhost.ta lkaboutautos.com...
> I replaced my cap, rotor, and PCV valve with Honda parts about 4
> weeks ago on my 98 civic 5spd (205000kms). I noticed a big difference in
> acceleration. So I gave myself a week to enjoy the newfound peppiness,
> and then started driving normally again.
>
> However, even after resuming normal driving, my mileage is definitely
> worse than it was before.
>
> Before I got easily to 1/2 tank (23-25 liter fillup) and the trip
> Odometer would read between 270 and 330kms depending on the driving mix.
> (usually about 50/50 city/hwy) Now I get to about 260kms tops on the same
> amount of fuel and driving ratio.
>
> It is a little cooler out now than in summer, but its still above
> freezing, so the mileage decrease experienced from the cold should not be
> a huge factor yet.
>
> I thought maybe my plug wires (about 2.5 years old) were bad. I did
> an Ohm check on them, they are all around 3000 - 6000 ohms. My #3 wire
> didn't even register any resistance. Could that be a problem? I pulled
> that wire while the car was running, and there is definitely spark going
> to the #3 cylinder.
>
> So there definitely doesn't seem to be any problems with the
> wires, but that it doesn't register resistance I thought was kinda weird.
> Also, if there was a huge problem with #3, wouldn't I get a Check engine
> light?
>
> I also replaced my spark plugs last March with NGK plugs from a
> Reputable parts store. I looked at them today, and they still look fine.
>
> So no probs there.
>
> Also, when I did the PCV valve, I noticed that the old one (which
> Has probably never been replaced) was still functioning perfectly. A
> Little gummed up, but still had that rattle when I shook it.
>
> In my previous experiences, when a part is replaced due to wearing
> out, generally the problem shifts to another problem part, until you
> replace everything and it finally works properly. In this case, I'm
> pretty sure I've done everything I can. Am I missing anything?
>
>



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  #3 (permalink)  
Old 29 Oct 2004, 05:56 pm
disallow
Guest
 
Posts: n/a
Default Re: Mileage issues on 98 Civic

Priced out new wires today, Bosch and they offer a lifetime
warranty. Coooool....

I guesss we'll see if they make a diff. I probably need to
do my plugs again now too, even though I did them last
march, they are probably all messed up now too from running
with a weak rotor and bad wires.

t

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  #4 (permalink)  
Old 31 Oct 2004, 12:25 pm
JEEP
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Posts: n/a
Default Re: Mileage issues on 98 Civic

Never Ever pull a plug wire while the car is running. I have seen the
emissions CPU fried several times by people doing that. That is old
school...
"disallow" <loewen_t at yahoo.ca @> wrote in message
news:3e8d09d326f888c6603cdbe735686df6@localhost.ta lkaboutautos.com...
>I replaced my cap, rotor, and PCV valve with Honda parts about 4
> weeks ago on my 98 civic 5spd (205000kms). I noticed a big difference in
> acceleration. So I gave myself a week to enjoy the newfound peppiness,
> and then started driving normally again.
>
> However, even after resuming normal driving, my mileage is definitely
> worse than it was before.
>
> Before I got easily to 1/2 tank (23-25 liter fillup) and the trip
> Odometer would read between 270 and 330kms depending on the driving mix.
> (usually about 50/50 city/hwy) Now I get to about 260kms tops on the same
> amount of fuel and driving ratio.
>
> It is a little cooler out now than in summer, but its still above
> freezing, so the mileage decrease experienced from the cold should not be
> a huge factor yet.
>
> I thought maybe my plug wires (about 2.5 years old) were bad. I did
> an Ohm check on them, they are all around 3000 - 6000 ohms. My #3 wire
> didn't even register any resistance. Could that be a problem? I pulled
> that wire while the car was running, and there is definitely spark going
> to the #3 cylinder.
>
> So there definitely doesn't seem to be any problems with the
> wires, but that it doesn't register resistance I thought was kinda weird.
> Also, if there was a huge problem with #3, wouldn't I get a Check engine
> light?
>
> I also replaced my spark plugs last March with NGK plugs from a
> Reputable parts store. I looked at them today, and they still look fine.
>
> So no probs there.
>
> Also, when I did the PCV valve, I noticed that the old one (which
> Has probably never been replaced) was still functioning perfectly. A
> Little gummed up, but still had that rattle when I shook it.
>
> In my previous experiences, when a part is replaced due to wearing
> out, generally the problem shifts to another problem part, until you
> replace everything and it finally works properly. In this case, I'm
> pretty sure I've done everything I can. Am I missing anything?
>
>



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  #5 (permalink)  
Old 31 Oct 2004, 02:38 pm
Michael Pardee
Guest
 
Posts: n/a
Default Re: Mileage issues on 98 Civic

FWIW - a month ago my company truck wouldn't start when I was out in the
boonies. Had it towed, and the shop noted it apparently had never been tuned
in the 10 years and 155K miles on the clock! Tuneup, with filters, made it
run again. But 5 minutes out of the shop the check engine light came on, and
it did so the next three times I drove it (after 5 minutes). The ECU had to
learn new settings after the tune-up. Maybe yours too?

Mike
"disallow" <loewen_t at yahoo.ca @> wrote in message
news:3e8d09d326f888c6603cdbe735686df6@localhost.ta lkaboutautos.com...
>I replaced my cap, rotor, and PCV valve with Honda parts about 4
> weeks ago on my 98 civic 5spd (205000kms). I noticed a big difference in
> acceleration. So I gave myself a week to enjoy the newfound peppiness,
> and then started driving normally again.
>
> However, even after resuming normal driving, my mileage is definitely
> worse than it was before.
>
> Before I got easily to 1/2 tank (23-25 liter fillup) and the trip
> Odometer would read between 270 and 330kms depending on the driving mix.
> (usually about 50/50 city/hwy) Now I get to about 260kms tops on the same
> amount of fuel and driving ratio.
>
> It is a little cooler out now than in summer, but its still above
> freezing, so the mileage decrease experienced from the cold should not be
> a huge factor yet.
>
> I thought maybe my plug wires (about 2.5 years old) were bad. I did
> an Ohm check on them, they are all around 3000 - 6000 ohms. My #3 wire
> didn't even register any resistance. Could that be a problem? I pulled
> that wire while the car was running, and there is definitely spark going
> to the #3 cylinder.
>
> So there definitely doesn't seem to be any problems with the
> wires, but that it doesn't register resistance I thought was kinda weird.
> Also, if there was a huge problem with #3, wouldn't I get a Check engine
> light?
>
> I also replaced my spark plugs last March with NGK plugs from a
> Reputable parts store. I looked at them today, and they still look fine.
>
> So no probs there.
>
> Also, when I did the PCV valve, I noticed that the old one (which
> Has probably never been replaced) was still functioning perfectly. A
> Little gummed up, but still had that rattle when I shook it.
>
> In my previous experiences, when a part is replaced due to wearing
> out, generally the problem shifts to another problem part, until you
> replace everything and it finally works properly. In this case, I'm
> pretty sure I've done everything I can. Am I missing anything?
>
>



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  #6 (permalink)  
Old 05 Nov 2004, 09:40 am
M.C. Tee
Guest
 
Posts: n/a
Default Re: Mileage issues on 98 Civic

did you reset your ecu after you did the tune up?



"disallow" <loewen_t at yahoo.ca @> wrote in message
news:3e8d09d326f888c6603cdbe735686df6@localhost.ta lkaboutautos.com...
>I replaced my cap, rotor, and PCV valve with Honda parts about 4
> weeks ago on my 98 civic 5spd (205000kms). I noticed a big difference in
> acceleration. So I gave myself a week to enjoy the newfound peppiness,
> and then started driving normally again.
>
> However, even after resuming normal driving, my mileage is definitely
> worse than it was before.
>
> Before I got easily to 1/2 tank (23-25 liter fillup) and the trip
> Odometer would read between 270 and 330kms depending on the driving mix.
> (usually about 50/50 city/hwy) Now I get to about 260kms tops on the same
> amount of fuel and driving ratio.
>
> It is a little cooler out now than in summer, but its still above
> freezing, so the mileage decrease experienced from the cold should not be
> a huge factor yet.
>
> I thought maybe my plug wires (about 2.5 years old) were bad. I did
> an Ohm check on them, they are all around 3000 - 6000 ohms. My #3 wire
> didn't even register any resistance. Could that be a problem? I pulled
> that wire while the car was running, and there is definitely spark going
> to the #3 cylinder.
>
> So there definitely doesn't seem to be any problems with the
> wires, but that it doesn't register resistance I thought was kinda weird.
> Also, if there was a huge problem with #3, wouldn't I get a Check engine
> light?
>
> I also replaced my spark plugs last March with NGK plugs from a
> Reputable parts store. I looked at them today, and they still look fine.
>
> So no probs there.
>
> Also, when I did the PCV valve, I noticed that the old one (which
> Has probably never been replaced) was still functioning perfectly. A
> Little gummed up, but still had that rattle when I shook it.
>
> In my previous experiences, when a part is replaced due to wearing
> out, generally the problem shifts to another problem part, until you
> replace everything and it finally works properly. In this case, I'm
> pretty sure I've done everything I can. Am I missing anything?
>
>



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