94 Camaro LT1/Engine Stumble or Hesitation at 1/2 Throttle

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afrances - 27 Jan 2004 01:27 GMT

What could be causing an engine stumble/hesitation at half throttle when
accelerating or under load, this only happens after the car is fully warmed
up?

Also, any clue on how to increase heater output, once the mercury drops
below 35, the heater is practically useless?

Any help would be appreciated!

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Bralgar - 27 Jan 2004 06:04 GMT

> What could be causing an engine stumble/hesitation at half throttle when
> accelerating or under load, this only happens after the car is fully warmed
> up?

I can't help you on that one, I've never experienced that type of problem on
my '93, but.........

> Also, any clue on how to increase heater output, once the mercury drops
> below 35, the heater is practically useless?
>
> Any help would be appreciated!

.........I would suggest you back-flush your heater core. What I mean by
this is have your heater core flushed from the opposite directon that the
coolant usually flows. This will usually clean it out more completely
allowing it to "heat" better once most of the deposites have been flushed
out of it, that were insulating it internally.

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98 Camaro - 27 Jan 2004 21:44 GMT

When you mention, "after warmed up" you throw up the red flag for 02
sensors.

--

> > What could be causing an engine stumble/hesitation at half throttle when
> > accelerating or under load, this only happens after the car is fully
[quoted text clipped - 14 lines]
> allowing it to "heat" better once most of the deposites have been flushed
> out of it, that were insulating it internally.

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