- Jan 25, 2012
- 525
I'm looking for everyone's 2cents, although in Canada that's not worth anything now that the penny is gone.
So my truck has always idled very smooth, once the fan clutch shuts off I have to question if it's even running sometimes. Last night I started the truck, which had been running many times through out the day already, and it immediately felt rough. The best way to describe it would be like the vibration if you had an exhaust leak near the engine, but the exhaust sounds fine. It's not the 10hz vibration associated with the motor mounts, its much faster then that. I want to say it feels like RPM/6 but my hands are not exactly a frequency counter. It's much more noticeable when sitting at idle but I can still feel it while driving. Although the truck doesn't feel under powered, I do drive like a grandma. The same rough vibration is present in drive and park. I have "Torque" so I checked O2 and tach, both look fine, tach is steady and O2 is cycling. There's no smell of gas at the tailpipe or under the hood. I cleaned the TB just a couple of months ago and had the battery cable off for an hour. I replaced the air filter before the end of the summer. Regarding gas; I always fill the tank at about an 1/8th and right now I'm at a 1/2 tank. So I don't think I picked up any bad gas. We can't get any BG44 here in Canada, but I'm going to drop out later and pick something up for the tank.
Any thoughts? What can I monitor/check with Torque that might point me in one direction or exclude something? I'd of course like to try the simple things first. It's too dam cold to be hanging out in under the hood scratching my head.
So my truck has always idled very smooth, once the fan clutch shuts off I have to question if it's even running sometimes. Last night I started the truck, which had been running many times through out the day already, and it immediately felt rough. The best way to describe it would be like the vibration if you had an exhaust leak near the engine, but the exhaust sounds fine. It's not the 10hz vibration associated with the motor mounts, its much faster then that. I want to say it feels like RPM/6 but my hands are not exactly a frequency counter. It's much more noticeable when sitting at idle but I can still feel it while driving. Although the truck doesn't feel under powered, I do drive like a grandma. The same rough vibration is present in drive and park. I have "Torque" so I checked O2 and tach, both look fine, tach is steady and O2 is cycling. There's no smell of gas at the tailpipe or under the hood. I cleaned the TB just a couple of months ago and had the battery cable off for an hour. I replaced the air filter before the end of the summer. Regarding gas; I always fill the tank at about an 1/8th and right now I'm at a 1/2 tank. So I don't think I picked up any bad gas. We can't get any BG44 here in Canada, but I'm going to drop out later and pick something up for the tank.
Any thoughts? What can I monitor/check with Torque that might point me in one direction or exclude something? I'd of course like to try the simple things first. It's too dam cold to be hanging out in under the hood scratching my head.
