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04-21-2004, 04:51 PM

Sorry to hear about your bike. Hope you weren't on it when it got hit?! Just because your check engine light came on at a "certain time"...doesn't mean you were necessarily throwing the code right at that moment. The check engine light can come on from a code it through the day before maybe...or from the week prior. You can even read your codes when your check engine light is not flashing...and quite often there will be some stored codes in there. You might want to check that orange ground wire for the O2 sensors and make sure it's grounded. It's located right behind the upper intake/ throttle body area...coming out of the big 'ol wiring harness there.

Also, it probably doesn't have anything to do with the codes you are pulling...but I've heard that the tube running from your oil filler tube to your throttle body should in fact be hooked up to vacuum. I'm not sure of the specifics...but having it hooked up to the throttle body is supposed to help suck out the exhaust gases out of the combustion chamber &/or crank case. Something like that. Anyway...I've had mine unhooked from my TB for years now. I too have my baffle in my valve covers removed due to the 1.72 rockers. I had a tube running from the oil fillter tube down near my charcoal canister into the open air. I've also ran a breather. I've been told that even if some oil does spit up there due to the baffle being removed that it won't hurt anything...and that the motor may actually run better & more effeciently with the tube hooked up to the throttle body, the way it came from the factory.

Anyone else have any theories on this rubber hose running from the oil filler tube on the passenger side valve cover to the throttle body??

04-21-2004, 04:51 PM	#3
Simi Stang Guest Posts: n/a	O2 & evap Sorry to hear about your bike. Hope you weren't on it when it got hit?! Just because your check engine light came on at a "certain time"...doesn't mean you were necessarily throwing the code right at that moment. The check engine light can come on from a code it through the day before maybe...or from the week prior. You can even read your codes when your check engine light is not flashing...and quite often there will be some stored codes in there. You might want to check that orange ground wire for the O2 sensors and make sure it's grounded. It's located right behind the upper intake/ throttle body area...coming out of the big 'ol wiring harness there. Also, it probably doesn't have anything to do with the codes you are pulling...but I've heard that the tube running from your oil filler tube to your throttle body should in fact be hooked up to vacuum. I'm not sure of the specifics...but having it hooked up to the throttle body is supposed to help suck out the exhaust gases out of the combustion chamber &/or crank case. Something like that. Anyway...I've had mine unhooked from my TB for years now. I too have my baffle in my valve covers removed due to the 1.72 rockers. I had a tube running from the oil fillter tube down near my charcoal canister into the open air. I've also ran a breather. I've been told that even if some oil does spit up there due to the baffle being removed that it won't hurt anything...and that the motor may actually run better & more effeciently with the tube hooked up to the throttle body, the way it came from the factory. Anyone else have any theories on this rubber hose running from the oil filler tube on the passenger side valve cover to the throttle body??