Low-RPM hesitation: 1990 Camry V6

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abbottim@yahoo.com - 19 Jan 2007 15:45 GMT

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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Ray O - 19 Jan 2007 17:21 GMT

> 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)

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Ray O
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telehauler - 15 Feb 2007 19:23 GMT

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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telehauler

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Ray O - 15 Feb 2007 20:06 GMT

> 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)
[quoted text clipped - 4 lines]
> 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.

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Ray O
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