306 XSi too hot after fixing misfire problem

Hi all
My '95 306 XSi has had a misfire/juddering acceleration problem
for more months than I'd care to admit to - from reading this
newsgroup & elsewhere I had been chasing down air leaks and other
possibles as causes of the problem. However after a casual comment
from a local garage I realised that the HT leads were sparking,
replaced the leads and - Bingo! My misfire is gone.

I report this here partly so others can know about this as a possible
caused. And I'm embarrassed for not trying the simpler things first.
However...

When the car was misfiring the engine would get hotter than I'd like -
up to around 110 or higher in town traffic - but I was able to keep
the temperature down by keeping in low gear & the revs outside the
misfire range. After I had the HT problem diagnosed I also replaced
the spark plugs, and reset the ECU, guessing that the misfire would
have 'miscalibrated' the ECU.

Now though, the engine is consistently running hot - 110 or greater,
and a couple of times it's hit the temperature at which the STOP light
comes on ;-(. My oil & water levels are good good and the engine seems
to be running well.

I'm guessing that fixing the misfire problem may be showing up this
temperature problem, or that they may be related. I was hoping that my
new sparkplugs & reset ECU approach would work, & now it hasn't I'm
wondering what to do next. Any suggestions?

Thanks
jon N

not wanting to ask the obvious but is the electric cooling fan cutting in
when it should,
Only ask this as I had a Vauxhall many moons ago and if you watched the
temperature gauge then as soon as you saw it pass a certain point you new
the fan would cut in, plus it had a battery gauge so you could see the power
drain. Occasionally the fan would not cut in and it was usually a dirty
connections, once it was the relay that had failed
Anyway, its a fine line between the fan coming on and the engine
overheating.


GGJ

"jkn" wrote in message

> Hi all
> My '95 306 XSi has had a misfire/juddering acceleration problem
> for more months than I'd care to admit to - from reading this
> newsgroup & elsewhere I had been chasing down air leaks and other
> possibles as causes of the problem. However after a casual comment
> from a local garage I realised that the HT leads were sparking,
> replaced the leads and - Bingo! My misfire is gone.
>
> I report this here partly so others can know about this as a possible
> caused. And I'm embarrassed for not trying the simpler things first.
> However...
>
> When the car was misfiring the engine would get hotter than I'd like -
> up to around 110 or higher in town traffic - but I was able to keep
> the temperature down by keeping in low gear & the revs outside the
> misfire range. After I had the HT problem diagnosed I also replaced
> the spark plugs, and reset the ECU, guessing that the misfire would
> have 'miscalibrated' the ECU.
>
> Now though, the engine is consistently running hot - 110 or greater,
> and a couple of times it's hit the temperature at which the STOP light
> comes on ;-(. My oil & water levels are good good and the engine seems
> to be running well.
>
> I'm guessing that fixing the misfire problem may be showing up this
> temperature problem, or that they may be related. I was hoping that my
> new sparkplugs & reset ECU approach would work, & now it hasn't I'm
> wondering what to do next. Any suggestions?
>
> Thanks
> jon N
>