emissions trouble

While true - I'd be complaining loudly if I had a miss-fire on a little
4 cylinder 1.9 liter engine!
(I own and maintain two SC2 Saturns. Miss-firing is very hard to not
notice.)
The culpability of the coolant temperature sensor in this vehicle is
legendary.
(Been there. Done that. Not making ANY of this up!)

'If not A and B (replacement of O2 sensor and Catalytic converter),
then probably C and if not - possibly D"
My assumption is based on the original poster's information.
When *I* replaced *my* coolant temperature sensor *I* was 100% correct.
I've gone through the same thing twice with the same model vehicle.
Rebuttal?
-WaV


Doug Miller wrote:
> In article .com>, "wavy" > wrote:
> >Yes, I had the same result when the coolant temperature sensor went
> >bad.
> >Replacing it turned my "Fail" into a "Pass".
> [...]
> >If this isnt the problem, you've got an injector problem
>
> Not so fast there... all it takes is one spark plug firing only intermittently
> to put a pretty fair amount of unburned gasoline (hydrocarbons) in the
> exhaust. There are a number of other things that will cause that symptom, too,
> and to say that if it's not 'A' then it must be 'B' is simply incorrect.
>
> --
> Regards,
> Doug Miller (alphageek at milmac dot com)
>
> It's time to throw all their damned tea in the harbor again.

In article om>, "wavy" > wrote:
>While true - I'd be complaining loudly if I had a miss-fire on a little
>4 cylinder 1.9 liter engine!
>(I own and maintain two SC2 Saturns. Miss-firing is very hard to not
>notice.)
>The culpability of the coolant temperature sensor in this vehicle is
>legendary.
>(Been there. Done that. Not making ANY of this up!)

Didn't say you were. I'm just taking issue with your statement that if it's
not the CTS, then it "must" be an injector problem.

That simply is not true -- there are other problems that can cause the same
symptom. I cited a bad spark plug as a simple example; that was not meant to
be a complete list of possibilities.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.