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When I am driving and start to go barely past 60 mph my truck begins to vibrate. It gets worse the faster I go. But if I let off of the gas and it started to decelerate the vibrating stops. When i come to a complete stop and I am idling there is no vibrations at all . It runs smooth. There has been on certain occasions that it will run rough when idling, and that usually happens when I am speeding up and slowing down almost consistently because of high traffic. The steering wheel doesn’t really feel like ti shakes but feels like the entire vehicle does. I had diagnostics done on the vehicle and they told me the most expensive parts basically, fuel pump, spider, and oxygen sensors needed replaced. They said the fuel pump was weak. Will these things cause the vehicle to shake at faster speeds or is there something else? I do not have the money to play guessing games with this vehicle and would like a clearer answer to why this is happening. I appreciate any help. Thanks.
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Not sure never tried it. But when it acts funny like this the RPMS aren’t really high I don’t think. When it acts like this and I am running at 70 mph, the rpms are at 2100 2200 at most. It never goes any higher. But when it runs like this and its not as rough the rpms stay around 1800 and 2000. Not sure if that helps much. If not I will try the rpm thing. Thanks for answering.
Look to make sure your truck isn’t misfiring at low rpm on the highway. That will cause it to vibrate when you are on the accelerator, but not when you let off. Alternatively, maybe it’s a driveshaft issue. I would respectfully disagree with Evil-i on this one. While a lot of highway shakes and shimmy’s are from misbalanced tires, I would say since the vibration is accelerator related, it’s engine related as well. Have your computer checked to see if it’s throwing any codes.
I did have a shop do a full diagnostics on it and they said my fuel pump was weak, one of my injectors in not closing all they way or opening all the way and my o2 sensors are bad or something. Also about a year ago I had a different transmission put in. The truck ran smooth before this and after they installed it, it has done this. I wasn’t sure if any of this information is or was relevant but thought I would post it. My husband thinks it may be something fuel related as well because of it smoothing out when not pressing the gas pedal. But he is not sure and isn’t around right now to check it out. I am sure all these things were the same shape they were in now and they were then but could maybe something to do with the transmission have something to do with this? And thanks for the other answers. I will make a list of these things to get checked.
[quote=”Hockeyclark” post=177775]Look to make sure your truck isn’t misfiring at low rpm on the highway. That will cause it to vibrate when you are on the accelerator, but not when you let off. Alternatively, maybe it’s a driveshaft issue. I would respectfully disagree with Evil-i on this one. While a lot of highway shakes and shimmy’s are from misbalanced tires, I would say since the vibration is accelerator related, it’s engine related as well. Have your computer checked to see if it’s throwing any codes.[/quote]
I hear you. I mentioned it because the impression I got from the OP was that the vibrations were related to road speed, not throttle position. Maybe I misunderstood. Wouldn’t be the first time.
[quote=”Evil-i” post=177820][quote=”Hockeyclark” post=177775]Look to make sure your truck isn’t misfiring at low rpm on the highway. That will cause it to vibrate when you are on the accelerator, but not when you let off. Alternatively, maybe it’s a driveshaft issue. I would respectfully disagree with Evil-i on this one. While a lot of highway shakes and shimmy’s are from misbalanced tires, I would say since the vibration is accelerator related, it’s engine related as well. Have your computer checked to see if it’s throwing any codes.[/quote]
I hear you. I mentioned it because the impression I got from the OP was that the vibrations were related to road speed, not throttle position. Maybe I misunderstood. Wouldn’t be the first time.[/quote]
It’s all good, buddy. You are always helping people out here. Plus, you could be right. I have a shimmy that is intermittent on my truck but it is tire related. Life is weird.
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