January 25, 20188 yr Hey guys running out of options here, I have a 1999 Impreza outback sport. 301,000 miles. 2.2l engine. 5 speed Manual. my cats were clogged due to a misfire so I knocked the filters out and put the pipes back on. my car currently has a problem where it will almost sound like its spitting If I give more than half throttle. its been doing this since before the cats were knocked out. I just replaced the throttle body position sensor due to a diagnostic that stated it was running at low efficiency, still nothing changed. I replaced the fuel filter in march of 2017 along with injector number three.(hence the misfire I had) car has California emissions. only code is an 02 sensor code since I knocked the cats out. any advice would be helpful. Thanks! Edited January 25, 20188 yr by CrazyCollege
January 25, 20188 yr knock sensors crack, go bad, sometimes no code - they cut power by pulling timing, many folks use the cheap ebay units with good results check for slipped cam/crank timing? rare but possible.
January 25, 20188 yr Was the tps used or new? Check TPS installation and alignment. Some have a specific procedure to align them properly. It’s simole but checking is a good idea. Keep checking your codes to see if any pop up. Post the oxygen sensor code you’re getting. Check timing belt alignment marks and tensioner though that should result in noise. Knock sensors most common sensor failure on that engine. $8 ebay specials work great. Should give a check engine light but I’ve seen stranger things. Coolant temp sensor - the one for the ECU. Plugs, wires should be NGK and quality and have less than 300,000 miles on them. Check condition of plugs and see if one looks different than the others or they have oil on any of the plugs valve clearance and compression or leak down test once you’re running out of options.
January 25, 20188 yr Author I also did just unplug and check knock sensor cleaned it off and reinstalled it
January 25, 20188 yr Author P0325 is on since I haven’t plugged it back in since checking knock sensor
January 25, 20188 yr kinda wonder if you have a bad ground connection or wire harness/connector somewhere. any sign of rodent damage?
January 25, 20188 yr Author No I keep it in a garage. Not to say they can’t get in there but I’ve checked to wires no damage
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