Octavarium454 Posted December 22, 2009 Report Posted December 22, 2009 So, I have an erratic cylinder 2 misfire that will come and go as it pleases. I have changed lower intake gaskets and the plenum gasket, got new fuel injector o-rings, threw on new wires and coils then my MSD wires and coils, removed the metal plug protectors, changed the injector, changed the plug, changed the plug again, ran a compression check (everything is good), and disconnected the catalytic converter (did solve my severe back pressure issue though, however the exhaust has a leak right at the manifold now). After changing the gaskets, it went away for about 2 days then came back, but this time it also popped a code saying bank 1 too lean. This motor, I can't describe in words how much it is making me RAGE! Quote
cutty Posted December 22, 2009 Report Posted December 22, 2009 im going to say a problem with one of the o2 sensors. Quote
Addicted to eaton Posted December 22, 2009 Report Posted December 22, 2009 im going to say a problem with one of the o2 sensors. sounds like it to me! Quote
Octavarium454 Posted December 22, 2009 Author Report Posted December 22, 2009 im going to say a problem with one of the o2 sensors. sounds like it to me! Really? I knew an O2 sensor could screw up a lot of things, but I was unaware that it could legitimately cause a misfire. I will change both then when I drop the exhaust. Quote
tornado_735 Posted December 22, 2009 Report Posted December 22, 2009 im going to say a problem with one of the o2 sensors. sounds like it to me! Really? I knew an O2 sensor could screw up a lot of things, but I was unaware that it could legitimately cause a misfire. I will change both then when I drop the exhaust. OOOOH yes it can. More than likely it is your upstream O2 sensor. The back ones aren't really prone to failing (although they can and do) Quote
Andrew Posted December 23, 2009 Report Posted December 23, 2009 the new o2 wont fix a misfire....... Quote
tornado_735 Posted December 23, 2009 Report Posted December 23, 2009 the new o2 wont fix a misfire....... Tell that to the random misfire I was having in my Heep. I forgot to ask, is it throwing any o2 codes? Quote
Octavarium454 Posted December 23, 2009 Author Report Posted December 23, 2009 Besides the bank 1 fuel air ratio lean code, no. I'm liking this idea though as my misfire disappears under heavy load. Quote
digitaloutsider Posted December 24, 2009 Report Posted December 24, 2009 im going to say a problem with one of the o2 sensors. sounds like it to me! Really? I knew an O2 sensor could screw up a lot of things, but I was unaware that it could legitimately cause a misfire. I will change both then when I drop the exhaust. OOOOH yes it can. More than likely it is your upstream O2 sensor. The back ones aren't really prone to failing (although they can and do) Downstream O2 doesn't do shit aside from checking emissions. Only Sensor 1 does anything. Quote
tornado_735 Posted December 24, 2009 Report Posted December 24, 2009 Actually they are prone to failing I've never had trouble out of one. Quote
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