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From: baytown on 6 Nov 2007 15:50
I have a 93 Toyota Camry with 6 cylinders. I have recently been
getting poor gas mileage and have been trying to figure out why. I
have checked out the plug wires, plugs, and compression. My
compression is great; all cylinders read between 170 and 175 pounds.
All plugs are a nice brown grey in color where it fires except #1.
This plug seemed carbon fouled. I can't figure out why.

I put a tach on the engine and the idle wavers between 698 and 710
rpms. I would like some ideas on why the idle would be drifting like
that. My plug wires are relatively new; they only have about 10,000
miles on them and they are OEM from Toyota. I checked the plug wires
to see if there was any voltage leakage. I couldn't find any. Also,
I put a vacuum gauge on the engine and found a vacuum of about 19# at
idle. There was also a little drift of the vacuum (about 1-2#). I'd
like some ideas on what to do next.

From: Scott Dorsey on 7 Nov 2007 09:37
baytown <baytown43(a)gmail.com> wrote:
>I put a tach on the engine and the idle wavers between 698 and 710
>rpms. I would like some ideas on why the idle would be drifting like
>that. My plug wires are relatively new; they only have about 10,000
>miles on them and they are OEM from Toyota. I checked the plug wires
>to see if there was any voltage leakage. I couldn't find any. Also,
>I put a vacuum gauge on the engine and found a vacuum of about 19# at
>idle. There was also a little drift of the vacuum (about 1-2#). I'd
>like some ideas on what to do next.

Get out a propane torch or a can of WD-40 and start looking for
vacuum leaks.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."
From: Comboverfish on 7 Nov 2007 20:16
On Nov 6, 2:50 pm, baytown <baytow...(a)gmail.com> wrote:

> I put a tach on the engine and the idle wavers between 698 and 710
> rpms. I would like some ideas on why the idle would be drifting like
> that.

Is that a typo? You can't be worried about *12* RPMs, can you?

Toyota MDT in MO

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