lmdew Posted August 19, 2013 Share Posted August 19, 2013 It runs great. I pulled a trailer to Denver and back to get a frig. No CEL. A friend took it up to Denver for a relative and it failed emissions. I did tap into the IAC hose for the EGR pipe as the head could not be drilled. 95 2.2 with 155K on the engine and 320K on the car. HC GPM 1.0038 - Limit 1.2000 Passed CO GPM 41.6271 - Limit 15.0000 Failed CO2 392.0529 NOx GPM 1.0090 - Limit 2.0000 Passed Could the EGR Bypass be causing this? Thanks, Larry Link to comment Share on other sites More sharing options...
SubieTrav Posted August 19, 2013 Share Posted August 19, 2013 Usually with high NOx, there is a problem with the EGR, or catalytic converter, or high combustion temperature (overheating, running lean, vacuum leak). A high CO reading is a restriction of air mixing with the fuel, check air filter, and sensors dealing with air fuel, MAP OR MAF, o2, ECT, TPS. Those numbers are pretty high, it would take more than just dumping 10oz of acetone in the tank to pass. Link to comment Share on other sites More sharing options...
Fairtax4me Posted August 19, 2013 Share Posted August 19, 2013 Like Subietrav said, EGR would cause high NOx readings. High CO and CO2 means its either running rich, or the converter is not functioning properly. (Which could be due to a failing O2 sensor). Is the CO2 out of range or just the CO? Link to comment Share on other sites More sharing options...
lmdew Posted August 19, 2013 Author Share Posted August 19, 2013 NOx passed, but I'll double check the EGR is opening. The old DOHC engine the HG were completely gone, dumping coolant into the oil. When I filled the radiator to get the car home, when I started it water shot out the radiator cap about 15 feet into the air. First time I ever saw that. I'm guessing the OP over heated it for a long time. I'll check the O2 sensor and see if the plugs look rich. I do have a spare CAT I could put in if I need to. Thanks, Larry Link to comment Share on other sites More sharing options...
idosubaru Posted August 21, 2013 Share Posted August 21, 2013 (edited) does the converter have 320k on it? plugs and wires are good? if Subaru's without EGR pass emissions...they aren't under less stringent thresholds right? so that might suggest it shouldn't matter if everything else is golden. if the midpipe gets swapped, sell it to me, i need a rust free one. lol Edited August 21, 2013 by grossgary Link to comment Share on other sites More sharing options...
lmdew Posted August 21, 2013 Author Share Posted August 21, 2013 As far as I know it's the original cat and my be the original O2 sensor. New NGK plugs and good plug wires. Might have a good mid pipe for you, but I have been welding them as they crack around the welded joint in the mid pipe. Link to comment Share on other sites More sharing options...
Legacy777 Posted August 21, 2013 Share Posted August 21, 2013 I'd check/replace the O2 sensor and depending on how that goes, maybe swap in a different cat. Was the test a two speed idle test or just single speed? If it was a two speed idle test, were those numbers at idle or the higher speed test? Link to comment Share on other sites More sharing options...
lmdew Posted August 22, 2013 Author Share Posted August 22, 2013 two speed, at speed. Link to comment Share on other sites More sharing options...
Legacy777 Posted August 22, 2013 Share Posted August 22, 2013 What were the numbers at idle? Were they much better or just barely passing? Link to comment Share on other sites More sharing options...
lmdew Posted August 23, 2013 Author Share Posted August 23, 2013 Data sent, thanks, Larry Link to comment Share on other sites More sharing options...
lmdew Posted August 25, 2013 Author Share Posted August 25, 2013 Changed out the O2 and Temp Sensor! Thanks for the info. Larry Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now