Quote:
Originally Posted by Davo53209@yahoo.com
I just cleaned out the EGR valve, whereas I plan to to adjust the ignition timing next.
In the event that I'm still not gaining much improvement, do you think that it would be excessive to replace the PCV valve, the fuel injectors, do a valve job, or replace all of the vacuum lines. After all, they are twenty years old.
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it might be your o2 sensor. I have heard they go bad sometimes without throwing a check engine code. Try unplugging it and running the car around to see if it gets any worse fuel economy. If it stays roughly the same I would say its time to replace it.