1990 Toyota Camry

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Old 24 Dec 2006, 12:52 pm   #1 (permalink)
GraemJohn
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Default 1990 Toyota Camry

I currently use a 1990 Toyota Camry for all of my daily transportation
needs, the engine transmission, clutch all of those major components seem
to work great. BUT it does have some slight problems and hopefully someone
can help me out, When idling the RPM's will go from 2000-2500 back and
forth, and when it does that if you step out of the car you can smell
fuel. It also seems to get much worse gas milage then it did before, it
only gets 280 km to a full tank, which doesnt seem right. This vehicle
does have 450,000 km on it, but anyones opinions would be very much
appreciated.

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Old 24 Dec 2006, 02:10 pm   #2 (permalink)
mack
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Default Re: 1990 Toyota Camry


"GraemJohn" <graemjohnston@gmail.com> wrote in message
news:381fd48c88736256ec71a53ea7e785b6@localhost.ta lkaboutautos.com...
>I currently use a 1990 Toyota Camry for all of my daily transportation
> needs, the engine transmission, clutch all of those major components seem
> to work great. BUT it does have some slight problems and hopefully someone
> can help me out, When idling the RPM's will go from 2000-2500 back and
> forth, and when it does that if you step out of the car you can smell
> fuel. It also seems to get much worse gas milage then it did before, it
> only gets 280 km to a full tank, which doesnt seem right. This vehicle
> does have 450,000 km on it, but anyones opinions would be very much
> appreciated.
>

While I don't have an answer to the erratic rpm's, I would advise the poster
not to drive the car if there's a strong gas smell and uses a full tank of
gas to
go such a short distance....sounds like there's a bad fuel leak, and there's
likely
gasoline all over the hot engine, a bad combination.
Given the mileage of 450,000 km, it's probably old and getting cranky.


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Old 24 Dec 2006, 02:44 pm   #3 (permalink)
GraemJohn
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Default Re: 1990 Toyota Camry

I have looked for any sign of a fuel leak, but i have never seen any sort
of leak under the car, if that makes a difference.

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Old 24 Dec 2006, 04:45 pm   #4 (permalink)
Hachiroku ハチロク
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Default Re: 1990 Toyota Camry

On Sun, 24 Dec 2006 15:44:18 -0500, GraemJohn wrote:

> I have looked for any sign of a fuel leak, but i have never seen any sort
> of leak under the car, if that makes a difference.



Hmmm...it could be hitting something HOT and (so far) evaporating!

Is your Life Insurance paid up? :0

Look around the charcoal cannister, and the 'well' on the top of the
engine. Also, with the car running (and your flame-retardant suit on)
check and see if the injectors are spewing fuel anywhere...

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Old 24 Dec 2006, 06:00 pm   #5 (permalink)
GraemJohn
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Default Re: 1990 Toyota Camry

I have looked for all possible signs of fuel leakage and still i don't see
anything. Also when im on the highway the gas milage is fine, i can go 700
km on a full tank, it is just city driving when my RPM's are all over the
place.

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Old 24 Dec 2006, 07:50 pm   #6 (permalink)
EdV
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Default Re: 1990 Toyota Camry

your idle engine speed is 2000-2500? does it ever go down to 800
sometimes? the smell maybe coming from the exhaust, since the engine is
very hot due to constant high revolution and resulting in poor
combustion and thus the strong odor of fuel. Is the odor present at
startup or only when the engine is hot?

i heard of a similar symptom on a defective EGR valve or dirty EGR line
but not on a Camry

On Dec 24, 4:00 pm, "GraemJohn" <graemjohns...@gmail.com> wrote:
> I have looked for all possible signs of fuel leakage and still i don't see
> anything. Also when im on the highway the gas milage is fine, i can go 700
> km on a full tank, it is just city driving when my RPM's are all over the
> place.


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Old 26 Dec 2006, 01:21 am   #7 (permalink)
GraemJohn
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Default Re: 1990 Toyota Camry

Yes, it sometimes does drop down to even 500 RPM, and if i give it any gas,
it will stall out and it takes time for the RPM's to rise. Yes i do get the
fuel smell, there is also dark smoke on start up.

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Old 26 Dec 2006, 02:03 am   #8 (permalink)
Jason James
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Default Re: 1990 Toyota Camry




"GraemJohn" <graemjohnston@gmail.com> wrote in message
news:627ca32be318674152acd6f15b1298da@localhost.ta lkaboutautos.com...
> Yes, it sometimes does drop down to even 500 RPM, and if i give it any

gas,
> it will stall out and it takes time for the RPM's to rise. Yes i do get

the
> fuel smell, there is also dark smoke on start up.


From what you have said, it sounds like the injectors maybe too far worn to
meter the fuel on light throttle, or in other words they are leaking fuel
when they should be virtually off. There is another thing to check and that
is the fuel-pressure. If the fuel regulator is allowing too high a fuel-
pressure, the injectors will not be able to control the smaller metering
that is experienced at lower speeds.

1- get the fuel-rail fuel pressure measured. The fuel-rail feeds the
injectors, and is a bright-finished tube full of petrol, running along all
the injectors.

2. If fuel pressure is OK, consider getting the injectors leak-tested.

3- if injectors are OK, check the temperature sender is inidcatingOK on the
dash as it also tells the computer what temp the engine is at, eg, cold =
rich setting for the injector switching-duration times.

If they are OK,..then you get into more complex engine-management computer
stuff. In which case, a competant, non-ripoff auto-electrical mechanic is
required :-)

Jason


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