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Re: toyota hesitation/stalling/diesling in wet weather..
offen rong wrote:[color=blue]
>
> "jayo" <mr2driver@allspares.com> wrote in message
> news:f516c205.0504050636.5ffc2677@posting.google.com...[color=green]
> >K guys any help is appreciated..
> >
> > I got a 1992 Toyota MR2 N/A Japanese Import (3SGE engine). As part of
> > trying to diagnose this problem I have replaced the following -
> >
> > - HT Leads (replaced with Magnecor 8mm leads)
> > - Spark Plugs (numerous times)
> > - Distributor cap
> > - Distributor rotor arm
> > - Distributor seal & o-ring seal
> > - Fuel Filter
> > - Camshaft cover gasket.
> >
> > Here's whats happening..
> >
> > When I'm driving in rain/snowy conditions, after about 20 minutes of
> > driving I feel the engine begin to miss/hesitate. It will gradually
> > lose power and I will be forced to shift down in an attempt to keep it
> > ticking over.. The engine eventually dies and when I attepmpt to
> > re-start it, it turns over fine but won't fire up. On numerious
> > occasions upon releasing the ignition key, the engine starts itself in
> > reverse (I know hard to believe but when I stuck the car in 1st gear
> > and let off the clutch the car went in reverse!!!!!)
> >
> > If I sit in the car for about 20 mins and then re-tried the ignition,
> > the car will start and run fine - no hesitation.. I drive for another
> > few minutes, noticing my temperature gauge gradually reaching
> > operating temperature (mid way) and the behaviour repeats itself..
> > start to feel it miss/hesitate until it cuts out again.. Again it
> > won't restart..
> >
> > Thinking this was a temperature issue (given if I wait 20 mins for it
> > to cool right down it will start & run fine), the last time it
> > happened I pulled the coolant temperature sensor. This had no effect.
> > The car still wouldn't start.
> >
> > At the weekend, I checked the timing and made sure it was at 10
> > degrees and then proceeded to mimic the conditions which cause the car
> > to get into the state above. I power washed from above & below and
> > after a minute or so, the car began to hesitate and died. When I tried
> > to restart it wouldn't and actually started in reverse again.. I
> > thought to myself. Bingo I have ya now.. I can reproduce the problem..
> > I got out and attached one of the spark plug leads (complete with
> > spark plug) onto the coil and turned the ignition.. I could see a
> > spark so I figure my coil is ok.. So I re-connected the coil back to
> > the distributor and re-fitted the spark plug and tried the ignition
> > again.. This time it started.
> >
> > I have since tried power hosing the car (twice) but still I cannot get
> > it to fail again.
> >
> > Has anyone come across these symptoms before or has anyone got any
> > suggestions on what to check ??
> >
> > Cheers
> > jao[/color]
>
> Wait till dark, and open your hood, and spray one component at a time. You
> may see arcing going on that is not visible during daylight. I found a
> problem in another car using this method. I can't figure why it would start
> in reverse unless the transmission is controlled by electronics. Is it
> possible that as it warms up, components such as wiring, are starting to
> touch? I also had a Honda that would crap out in rain and car washes with
> similar symptoms as yours, and it was a bad ignitor assembly.[/color]
You probably should check how the wires are routed as well.
And the next time it won't run, take a look at the air
cleaner. Is it possible you are sucking water into the air
cleaner? Or is it possible that the air cleaner is icing?
Ed
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