4 week quandary

stalling
subaru
driving
impreza

#1

In brief:

1997 Subaru Impreza - While driving, car will just lose power and shut down. Car will start up again and go for a while before this occurs again. Happens very intermittently - no set pattern to occurance like going a certain speed, before it warms up, etc. So far have had the alternator replaced as well as the mass air flow sensor. 2 mechanics later (and still at the shop), cannot diagnose. Each time the mechanic(s) have the vehicle, it will not stall for them (of course!). Diagnostics do not indicate an issue.


#2

While driving, car will just lose power and shut down.

Is there any pattern to this? Like after two miles, or after sitting at idle for some time. etc.


#3

No - very intermittent. And has shut down at various speeds - anywhere from being on the highway to trying to park on the street.


#4

I’d look at the fuel filter. If its dirty there will be times when the fuel supply will be too restricted and the engine will stall. After a few moments or a minute or so the fuel will seep through and it will restart. This car is 13 years old and I’ll bet the fuel filters have never been changed.


#5

Subaru’s used to have an unreliable ignition module, a little electronic part that triggered the coil. But chasing these phantoms around in the dark can be VERY frustrating and expensive.