I have a 2000 malibu 3.1 v6 base.
My idle is all over the place. Normally it sits around 800rpm, however after anytime i unplug the sensors/have to take off the top intake manifold piece, the idle will then be all over the place. It's random.
Yesterday when started first thing in the morning it was 2000rpm. Drove to work, put it in park and it shot up to 3500rpm. It was idling so high that my brakes barely stopped the vehicle.
Then today it started up at 1200rpm. I've noticed after i drive it home from work (hour drive), the idle will be lower or closer to where its supposed to be.
I replaced me lower intake manifold gaskets about 1 year a go and experienced this then, but it went away. It seems like everytime i unplug the sensors it comes back and it just takes a while to work its way out. Maybe a buggy sensor? When this originally happened i replaced the MAF with no difference. Last night I unplugged each sensor I had disconnected to service my fuel injectors, and I found no difference in idle for any. Gakets on upper intake minfold are 1 years old.
I did notice that the front valve cover breather tube has a vacuum on it, and when i block it with my thumb, the idle decreases about 100rpm or so. I should also point out that the rear valve cover breather hose (that lead to ths air intake) is loose and not forming an air tight seal. However I wouldn't think this would matter since it's just leading to the air intake tube and has been like this before this started happening
Maybe i need to disconnect and reconnect my battery to reset everything? Since you are supposed to disconnect the battery before performing and maintenance. Thoughts?
Throttle body and sensors were cleaned 1 year ago. Fuel injector 0-rings just replaced last Sunday, hence i've had the problem since.
My idle is all over the place. Normally it sits around 800rpm, however after anytime i unplug the sensors/have to take off the top intake manifold piece, the idle will then be all over the place. It's random.
Yesterday when started first thing in the morning it was 2000rpm. Drove to work, put it in park and it shot up to 3500rpm. It was idling so high that my brakes barely stopped the vehicle.
Then today it started up at 1200rpm. I've noticed after i drive it home from work (hour drive), the idle will be lower or closer to where its supposed to be.
I replaced me lower intake manifold gaskets about 1 year a go and experienced this then, but it went away. It seems like everytime i unplug the sensors it comes back and it just takes a while to work its way out. Maybe a buggy sensor? When this originally happened i replaced the MAF with no difference. Last night I unplugged each sensor I had disconnected to service my fuel injectors, and I found no difference in idle for any. Gakets on upper intake minfold are 1 years old.
I did notice that the front valve cover breather tube has a vacuum on it, and when i block it with my thumb, the idle decreases about 100rpm or so. I should also point out that the rear valve cover breather hose (that lead to ths air intake) is loose and not forming an air tight seal. However I wouldn't think this would matter since it's just leading to the air intake tube and has been like this before this started happening
Maybe i need to disconnect and reconnect my battery to reset everything? Since you are supposed to disconnect the battery before performing and maintenance. Thoughts?
Throttle body and sensors were cleaned 1 year ago. Fuel injector 0-rings just replaced last Sunday, hence i've had the problem since.