Question about 1998 Subaru Forester
Getting all the air out is actually quite simple. Fit the thermostat. Make absolutely sure you know which way it goes in: ask the dealer if you are unclear. Put it in backwards and it does not work properly. Fill the radiator, and start the engine and let it idle. In about 5 minutes, the thermostat will open and the coolant level will go down. Stop the engine, fit the cap and top up the coolant. Now, squeeze the top hose, say, 10 times: you'll hear the coolant gurgle a bit. Remove the cap and top up the coolant. Start the engine and repeat. Eventually the gurgling will stop and all the air is out of the engine. Usually takes 2 or 3 iterations.
Do the final top up and take it for a run.
Posted on Sep 08, 2017
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Posted on Jan 02, 2017
Are there any other possible problems, or you are just not receiving spark at all now?
The coilpack could be dead and just need replaced. If you have a voltmeter or a test light, check the wiring on both sides of the coilpack harness to make sure it is receiving power.
I don't believe Subaru used ignitors past '99, but if they did, your should be located on the firewall behind the throttle body. Make sure it's plugged in and receiving power.
Coil packs do go bad from time to time. I had to replace mine in my
'98 Impreza a while back.
Posted on Mar 16, 2010
SOURCE: Subaru forester PO 171 code
Your fuel system is too lean. It's typically the primary O2 sensor (on the pipe between the engine and the catalytic converter). The mass airflow sensor is also possible but the O2 sensor is a wear item requiring periodic replacement and is more likely.
Posted on Jul 14, 2010
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