Hey folks I had a bunch of codes, put on a new EGR and PCV valve and a few of them went away.

Still remain with a Po300 code. The car is my sister''''s, and she hasn''t done ANY tune up to it all (besides the regular air filter and oil change) and it is at 138,000 miles. Any idea''s for the Po300 code?? The car is the 3.2L V6, 99 Rodeo.

Thanks

Edited by: evenflow

http://autorepair.about.com/cs/troub.../l/bl_obd_3.ht m


use the above link to see the OBD II codes;


P0300 is random cylinder missfire !


How new/clean are the sparkplugs?

The plugs aren''t new or clean at all.

They are the stock plugs at 138,000 miles. Think this could be throwing the code?

Quite possible its the plugs. They usually came with platinum plugs which are supposed to be good for 100k miles. Could be other things as well. ''98+ rodeos are known to get cracked intake manifold gaskets which will throw a p0300 but usually also throws lean and rich codes along with o2 sensor codes. Could also be a failing coil pack, or something as simple as a vacuum line leaking.