'95 Camry Four Wagon - Surging

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Old 02 Aug 2009, 07:46 am   #1 (permalink)
Leftie
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Default '95 Camry Four Wagon - Surging

This car had mild surging at highway speeds when we bought it
several years ago. Now, after a tuneup (shortly after we bought it) fuel
filter, and throttle body cleaning, the surging is still slowly
worsening. It is worst when accelerating moderately to highway speed.
Ideas? No Check Engine light. It idles fine. Fuel economy is ok.
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Old 02 Aug 2009, 08:30 am   #2 (permalink)
FatMoe
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Default Re: '95 Camry Four Wagon - Surging

Leftie wrote:
> This car had mild surging at highway speeds when we bought it several
> years ago. Now, after a tuneup (shortly after we bought it) fuel filter,
> and throttle body cleaning, the surging is still slowly worsening. It is
> worst when accelerating moderately to highway speed. Ideas? No Check
> Engine light. It idles fine. Fuel economy is ok.

If you aren't using Top Tier gasoline I'd run a couple or three tankfuls
through and see if that doesn't help or fix the problem. Read up it, I
recently helped my neighbor clean the injectors on his chev pickup that
would not start. If he had been using Top Tier I doubt he would have
had any problems. The chev has a different type fuel injection and is
more susceptible to injector clogging but deposits on intake valves and
buildup on injectors can be a problem with all vehicles.
If this doesn't help it's back to basics, the usual stuff, ignition,
fuel delivery, engine codes etc.
http://www.toptiergas.com/deposit_control.html
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Old 02 Aug 2009, 11:07 am   #3 (permalink)
Jason James
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Default Re: '95 Camry Four Wagon - Surging


"Leftie" <No@Thanks.net> wrote in message
news:04fdm.22284$8B7.2972@newsfe20.iad...
> This car had mild surging at highway speeds when we bought it several
> years ago. Now, after a tuneup (shortly after we bought it) fuel filter,
> and throttle body cleaning, the surging is still slowly worsening. It is
> worst when accelerating moderately to highway speed. Ideas? No Check
> Engine light. It idles fine. Fuel economy is ok.


In view of things you have done:
It could be the ignition is not advancing in step as load increases on the
engine. Get hold of a timing light, Hook it up to the ignition, and see if
the engine advances as you free rev the engine. Any non-linear increase of
advance could be the vacuum-advance being nutzed..

Jason


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