S40 Auto - 3 problems - are they related???

  • Thread starter Thread starter newbietothis
  • Start date Start date
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newbietothis

I have a S40 2.0i CD AUTO (96-98) and recently I have began to
encounter 3 problems and was wondering if they could be related.

1. Occassionaly, on a cold start, she will stall when I engage reverse
gear, and then won't start again. It seems to coincide with damp
weather.

2. After a cold start, when pulling out of first junction there will be
a sudden loss of mechanical power, revs drop as if she is going to
stall, after a second or two she suddenly springs back into life (bit
scarey when road is busy and traffic approaching fast from rear!).

3. The cooling fan seems to always run on now after the engine is
turned off; I know this normal behaviour on some cars (turbos etc) and
I had noticed it previously on hot days but now happens all the time.
It turns offf after a few minutes.

Any theories greatly received.
 
newbietothis said:
I have a S40 2.0i CD AUTO (96-98) and recently I have began to
encounter 3 problems and was wondering if they could be related.

1. Occassionaly, on a cold start, she will stall when I engage reverse
gear, and then won't start again. It seems to coincide with damp
weather.

2. After a cold start, when pulling out of first junction there will be
a sudden loss of mechanical power, revs drop as if she is going to
stall, after a second or two she suddenly springs back into life (bit
scarey when road is busy and traffic approaching fast from rear!).

3. The cooling fan seems to always run on now after the engine is
turned off; I know this normal behaviour on some cars (turbos etc) and
I had noticed it previously on hot days but now happens all the time.
It turns offf after a few minutes.

Any theories greatly received.
Click to expand...

#3 happens when the thermostat sticks open. The computer thinks the
problem is with the engine temperature sensor because the engine is not
warming up as it should. It then assumes certain temperatures at
startup, and a certain warmup rate, which if wrong will possibly cause
problems 1 & 2. Put in a new thermostat.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)
 
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