Discuss Low-RPM hesitation: 1990 Camry V6 in the alt.autos.toyota forum at Car Dealer Forums; When cruising very slow, with just a light touch on the accelerator, the engine kicks ...

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Old 01-19-2007, 05:48 PM
abbottim@yahoo.com
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Default Low-RPM hesitation: 1990 Camry V6

When cruising very slow, with just a light touch on the accelerator,
the engine kicks in and out, as if it's fuel starved. I also notice
that, when I accelerate fast from stop, there is a quick hesitation.
Wondering if there may be a throttle position sensor or something that
needs minor adjustment. Thanks folks!

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  #2 (permalink)  
Old 01-20-2007, 04:25 AM
Ray O
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Default Re: Low-RPM hesitation: 1990 Camry V6


<abbottim@yahoo.com> wrote in message
news:1169221553.345857.220930@51g2000cwl.googlegro ups.com...
> When cruising very slow, with just a light touch on the accelerator,
> the engine kicks in and out, as if it's fuel starved. I also notice
> that, when I accelerate fast from stop, there is a quick hesitation.
> Wondering if there may be a throttle position sensor or something that
> needs minor adjustment. Thanks folks!
>

A bad throttle position sensor would not cause the problems you are
describing.

Some things to check that might cause those problems:

clogged air filter
crack or hole in the black plastic intake tube between the air filter and
throttle body
vacuum leak
incorrect ignition timing
worn or incorrect spark plugs
bad spark plug wires
worn or incorrect rotor or distributor cap
clogged idle speed control valve
clogged fuel injector(s)
--

Ray O
(correct punctuation to reply)


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  #3 (permalink)  
Old 02-15-2007, 10:24 PM
telehauler
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Default Re: Low-RPM hesitation: 1990 Camry V6


Hi. I have a 1986 Camry with a 2SE 2.0L engine, and the idle sometimes
drops (surges) 300 - 400 RPM, sounding like it wants to quit almost.
If the idle control valve is clogged, is it serviceable or does it need
replacing?
I am also looking at buying a 90 - 92 Camry. Are both the I4 and V6
engines DOHC? I have a motorbike with DOHC, and valve (shim)
adjustment is a major operation. Do both these engines use shims, and
do you have to take the cams out to replace the shims? I know some
engines you do, and some you don't.
Thanking you in advance,
Herb Kruschke
Calgary, Canada


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  #4 (permalink)  
Old 02-15-2007, 10:25 PM
Ray O
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Default Re: Low-RPM hesitation: 1990 Camry V6


"telehauler" <telehauler.2m2aky@no-mx.forums.yourdomain.com.au> wrote in
message news:telehauler.2m2aky@no-mx.forums.yourdomain.com.au...
>
> Hi. I have a 1986 Camry with a 2SE 2.0L engine, and the idle sometimes
> drops (surges) 300 - 400 RPM, sounding like it wants to quit almost.
> If the idle control valve is clogged, is it serviceable or does it need
> replacing?


If the idle control valve is clogged, a shot of carburetor cleaner may free
it up.


> I am also looking at buying a 90 - 92 Camry. Are both the I4 and V6
> engines DOHC? I have a motorbike with DOHC, and valve (shim)
> adjustment is a major operation. Do both these engines use shims, and
> do you have to take the cams out to replace the shims? I know some
> engines you do, and some you don't.
> Thanking you in advance,
> Herb Kruschke
> Calgary, Canada
>


Both the I4 and V6 engines are DOHC. IIRC, both engines use shims and shims
can be replaced without removing the cams.
--

Ray O
(correct punctuation to reply)


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