Weird vibration
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Weird vibration
So this has me stumped at the moment. Any ideas?
2004 Dakota with 4.7, auto, 4x2. Runs fine,but if you turn on the heater fan or ac, as soon as the relay kicks in you get a noticeable, but small vibration. You can feel it in the steering wheel, and on the radiator cover. The engine, ac pump, alt all rock solid. It sounds like it is running rough, and it feels that way, but the engine is not vibrating. If you shut the fan off, then shut the engine off. Start it right back up, no vibration. Driving me nuts.
I dont think it is the heater fan, as I feel it up front, but I could be wrong. The aux. radiator fan is not on, so it isn’t that.
thanks for any help..
Gary
2004 Dakota with 4.7, auto, 4x2. Runs fine,but if you turn on the heater fan or ac, as soon as the relay kicks in you get a noticeable, but small vibration. You can feel it in the steering wheel, and on the radiator cover. The engine, ac pump, alt all rock solid. It sounds like it is running rough, and it feels that way, but the engine is not vibrating. If you shut the fan off, then shut the engine off. Start it right back up, no vibration. Driving me nuts.
I dont think it is the heater fan, as I feel it up front, but I could be wrong. The aux. radiator fan is not on, so it isn’t that.
thanks for any help..
Gary
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Joined: Feb 2005
Posts: 8,058
Likes: 183
From: Fort Worth, TX
The electric radiator fan was going to be my very first guess. It should come on automatically with the A/C compressor. You'd hear/feel it in the passenger footwell/behind the glovebox if it was the airbox fan.
