Toyota or aftermarket parts?

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Old 05 Apr 2004, 06:41 pm   #1 (permalink)
JP
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Default Toyota or aftermarket parts?

Hi folks

A while ago, I asked opinions on possible reasons for bad fuel mileage.
I still haven't found the source of the problem.
My fuel mileage went bad overnight last fall. I have a 93 4 cyl. Camry with
auto trans.
I recently found that the filler neck had small holes and figured it could
be where the smell of gas was coming from. I had it fixed and the smell is
still there. My mechanic found no trace of leak anywhere else. We will still
investigate if it gets worst.
My mechanic changed: plugs, air filter, thermostat, O2 sensor. Everything
reads OK on his computer. I went to the local dealer and they told me that I
should install their Toyota plugs and their O2 sensor. My question is: Isn't
a Bosch universal O2 sensor good enough?
Also, the exhaust system looks to be the original one, including catalytic
converter. I thought the cat might be the culprit but I am being told that
when the cat goes, you notice a loss in power and other effects. Everything
looks and sound OK to me.
I may have left a few details out but would appreciate any help.

Thanks guys.

JP


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Old 06 Apr 2004, 11:58 am   #2 (permalink)
Daniel M. Dreifus
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Default Re: Toyota or aftermarket parts?

"JP" <perettij@nbnet.nb.ca> wrote in message news:<59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca>...

> My fuel mileage went bad overnight last fall.
> My mechanic changed: plugs, air filter, thermostat, O2 sensor. I went to the local dealer and they told me that I
> should install their Toyota plugs and their O2 sensor. My question is: Isn't
> a Bosch universal O2 sensor good enough?


Did the mileage drop immediately after installation of the aftermarket
plugs and O2 sensor?
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Old 06 Apr 2004, 12:54 pm   #3 (permalink)
Jason James
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Default Re: Toyota or aftermarket parts?


"JP" <perettij@nbnet.nb.ca> wrote in message
news:59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca...
> Hi folks
>
> A while ago, I asked opinions on possible reasons for bad fuel mileage.
> I still haven't found the source of the problem.
> My fuel mileage went bad overnight last fall. I have a 93 4 cyl. Camry

with
> auto trans.
> I recently found that the filler neck had small holes and figured it could
> be where the smell of gas was coming from. I had it fixed and the smell is
> still there. My mechanic found no trace of leak anywhere else. We will

still
> investigate if it gets worst.
> My mechanic changed: plugs, air filter, thermostat, O2 sensor. Everything
> reads OK on his computer. I went to the local dealer and they told me that

I
> should install their Toyota plugs and their O2 sensor. My question is:

Isn't
> a Bosch universal O2 sensor good enough?


If the engine-exhaust -analyser indicates the fuel-air ratio is correct over
the engine's operating range (revs) and load,..then the O2 is fine. But that
finding is contingent on the air-fuel mix being correct and not just at
idle.

Plugs either fire or dont fire. If the engine mis-fired at high load, then
the ignition system would need checking out.

Whie the codes maybe OK, they dont reflect other potential problems such as
brake drag (see if the car can be moved while its standing (h/brake off) and
coasts without quickly slowing down.

If the ignition is not advancing correctly, fueleconomy will suffer. Correct
advance checks go beyond just checking it while free-revving the engine. The
engine also needs to be loaded or fooled into thinking its loaded, by
applying varying manifold pressured to the ECU. I dont know how far your
mechy went into these checks.



> Also, the exhaust system looks to be the original one, including catalytic
> converter. I thought the cat might be the culprit but I am being told that
> when the cat goes, you notice a loss in power and other effects.

Everything
> looks and sound OK to me.


A collapsed cat-conv is possible causing increased back-prssure and lousy
engine perf and economy, but I would put this cause in the last to be
checked basket.

Jason


> I may have left a few details out but would appreciate any help.
>
> Thanks guys.
>
> JP
>
>



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Old 06 Apr 2004, 05:59 pm   #4 (permalink)
JP
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Default Re: Toyota or aftermarket parts?

Daniel M. Dreifus wrote:
> "JP" <perettij@nbnet.nb.ca> wrote in message
> news:<59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca>...
>
>> My fuel mileage went bad overnight last fall.
>> My mechanic changed: plugs, air filter, thermostat, O2 sensor. I
>> went to the local dealer and they told me that I should install
>> their Toyota plugs and their O2 sensor. My question is: Isn't
>> a Bosch universal O2 sensor good enough?

>
> Did the mileage drop immediately after installation of the aftermarket
> plugs and O2 sensor?


Before.


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Old 06 Apr 2004, 07:31 pm   #5 (permalink)
Wolfgang
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Default Re: Toyota or aftermarket parts?

If the engine doesn't reach operating temperature you'll burn extra gass
(replace thermostat) -- how much of a diffewrence are you talking about. In
winter in cold areas gas is formulated differently hence you get worse
mileage along with it taking longer for the vehicle to warm up. Some Toyota
won't shift to high gear until they are warmed up too - hence less MPG.
What was it before and what is it now?

"Daniel M. Dreifus" <nospampls2002@yahoo.com> wrote in message
news:c5ef7dc0.0404060858.26a14fc@posting.google.co m...
> "JP" <perettij@nbnet.nb.ca> wrote in message

news:<59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca>...
>
> > My fuel mileage went bad overnight last fall.
> > My mechanic changed: plugs, air filter, thermostat, O2 sensor. I went to

the local dealer and they told me that I
> > should install their Toyota plugs and their O2 sensor. My question is:

Isn't
> > a Bosch universal O2 sensor good enough?

>
> Did the mileage drop immediately after installation of the aftermarket
> plugs and O2 sensor?



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Old 06 Apr 2004, 08:16 pm   #6 (permalink)
JP
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Default Re: Toyota or aftermarket parts?

SNIP
>
> If the engine-exhaust -analyser indicates the fuel-air ratio is
> correct over the engine's operating range (revs) and load,..then the
> O2 is fine. But that finding is contingent on the air-fuel mix being
> correct and not just at idle.
>
> Plugs either fire or dont fire. If the engine mis-fired at high load,
> then the ignition system would need checking out.


The plugs looked OK when checked. Will check again.

> Whie the codes maybe OK, they dont reflect other potential problems
> such as brake drag (see if the car can be moved while its standing
> (h/brake off) and coasts without quickly slowing down.


Thanks for the tip. Will check that.

> If the ignition is not advancing correctly, fueleconomy will suffer.
> Correct advance checks go beyond just checking it while free-revving
> the engine. The engine also needs to be loaded or fooled into
> thinking its loaded, by applying varying manifold pressured to the
> ECU. I dont know how far your mechy went into these checks.


I don't know but will ask.

>> Also, the exhaust system looks to be the original one, including
>> catalytic converter. I thought the cat might be the culprit but I am
>> being told that when the cat goes, you notice a loss in power and
>> other effects. Everything looks and sound OK to me.

>
> A collapsed cat-conv is possible causing increased back-prssure and
> lousy engine perf and economy, but I would put this cause in the last
> to be checked basket.


Acceleration seems normal to me.

> Jason

Thanks Jason


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Old 13 Apr 2004, 10:45 am   #7 (permalink)
Sean197429
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Default Re: Toyota or aftermarket parts?

Does anyone know where I can find a webpage of 2002 Camry SE for wheels and
tires?? I'm wanting to put some low profile wheels and tires, but I'm
wanting to see some pictures to see what I will like best?? Can you help
me out!!

Thanks

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Old 13 Apr 2004, 11:49 am   #8 (permalink)
William W. Plummer
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Default Re: Toyota or aftermarket parts?

Try google.com "2002 Camry SE wheels" finds lots! For example:
http://www.1010tires.com/Toyota-whee...me=Camry&year=


"Sean197429" <sean_hendrickson@taiamerica.com> wrote in message
news:dd3f70263a6c5aa4e869f22ebc9d7f4d@localhost.ta lkaboutautos.com...
> Does anyone know where I can find a webpage of 2002 Camry SE for wheels

and
> tires?? I'm wanting to put some low profile wheels and tires, but I'm
> wanting to see some pictures to see what I will like best?? Can you help
> me out!!
>
> Thanks
>



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Old 14 Apr 2004, 10:50 pm   #9 (permalink)
Matt
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Default Re: Toyota or aftermarket parts?

"JP" <perettij@nbnet.nb.ca> wrote in message news:<59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca>...
> Hi folks
>
> A while ago, I asked opinions on possible reasons for bad fuel mileage.
> I still haven't found the source of the problem.
> My fuel mileage went bad overnight last fall. I have a 93 4 cyl. Camry with
> auto trans.
> I recently found that the filler neck had small holes and figured it could
> be where the smell of gas was coming from. I had it fixed and the smell is
> still there. My mechanic found no trace of leak anywhere else. We will still
> investigate if it gets worst.
> My mechanic changed: plugs, air filter, thermostat, O2 sensor. Everything
> reads OK on his computer. I went to the local dealer and they told me that I
> should install their Toyota plugs and their O2 sensor. My question is: Isn't
> a Bosch universal O2 sensor good enough?
> Also, the exhaust system looks to be the original one, including catalytic
> converter. I thought the cat might be the culprit but I am being told that
> when the cat goes, you notice a loss in power and other effects. Everything
> looks and sound OK to me.
> I may have left a few details out but would appreciate any help.
>
> Thanks guys.
>
> JP


Check charcoal canister to see if it's faulty or not. if you don't see
any
gasoline stain; so it could be vapor. I expect your car has an EGR
valve, faulty charcal canister would mess up EGR valve system and
emmision control sststem and gasoline will burn more. BTW, exhaust
includes CO & NO. CO should be ordorless. NO does not smell like
gasoline.

One way you check it is by opening the hood and sniffing. If you
smell
gas under the hood and there are no other leaks, the canister could be
saturated with gas. If you pull it out and it reeks of gas, it is
likely not working. Good luck.
Matt
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Old 15 Apr 2004, 08:12 am   #10 (permalink)
JP
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Default Re: Toyota or aftermarket parts?

Thanks for the tip.
Will look into this.

JP

Matt wrote:
> "JP" <perettij@nbnet.nb.ca> wrote in message
> news:<59mcc.11106$Np3.378019@ursa-nb00s0.nbnet.nb.ca>...
>> Hi folks
>>
>> A while ago, I asked opinions on possible reasons for bad fuel
>> mileage.
>> I still haven't found the source of the problem.
>> My fuel mileage went bad overnight last fall. I have a 93 4 cyl.
>> Camry with auto trans.
>> I recently found that the filler neck had small holes and figured it
>> could be where the smell of gas was coming from. I had it fixed and
>> the smell is still there. My mechanic found no trace of leak
>> anywhere else. We will still investigate if it gets worst.
>> My mechanic changed: plugs, air filter, thermostat, O2 sensor.
>> Everything reads OK on his computer. I went to the local dealer and
>> they told me that I should install their Toyota plugs and their O2
>> sensor. My question is: Isn't a Bosch universal O2 sensor good
>> enough?
>> Also, the exhaust system looks to be the original one, including
>> catalytic converter. I thought the cat might be the culprit but I am
>> being told that when the cat goes, you notice a loss in power and
>> other effects. Everything looks and sound OK to me.
>> I may have left a few details out but would appreciate any help.
>>
>> Thanks guys.
>>
>> JP

>
> Check charcoal canister to see if it's faulty or not. if you don't see
> any
> gasoline stain; so it could be vapor. I expect your car has an EGR
> valve, faulty charcal canister would mess up EGR valve system and
> emmision control sststem and gasoline will burn more. BTW, exhaust
> includes CO & NO. CO should be ordorless. NO does not smell like
> gasoline.
>
> One way you check it is by opening the hood and sniffing. If you
> smell
> gas under the hood and there are no other leaks, the canister could be
> saturated with gas. If you pull it out and it reeks of gas, it is
> likely not working. Good luck.
> Matt



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