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1977 Dodge Passenger Van Full Size Van Base

1977 Dodge Passenger Van Full Size Van
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December 14, 2011, 3:00 pm

Durwood K

Question: Why does my van bounce when going up hill?

I guess I was not to clear about the vibrating problem. I am sure it is not a fuel problem as I have just replaced the fuel pump and the filter and it does not matter what the fuel level is. When going uphill it is running smooth until it starts to shift into a lower gear, (it is an automatic transmission) then it starts to feel like it is on a VERY rough road and/or the tires are REALLY out of balance . If I press the gas it smooths out. If I can guess when it is going to change gears and time it right I can keep it from happening. By pressing and releasing the gas pedal when I think it is going to happen it does not happen and by doing this I can very often make it all the way up without the problem,.

Hope this will let you better understand my problem.

December 19, 2011, 8:22 pm

Elizabeth K

In the future, if you want to continue a discussion, reply back to the post you sent so it goes to the same tech. Every time you post a new question, it is assigned randomly, and I have no access to your previous question.

But to get to your question, it does sound like a fuel delivery issue, although I see that you have addressed the parts that would cause the fuel problem (but did you check out the fuel sock--the in-tank strainer for the fuel pump?). Your description of the problem is a little confusing. It sounds like you're describing a power issue, but the words you are using make it sound like a suspension issue.

Does the problem only happen going up a hill? Or can you also have it when accelerating rapidly, like getting on a freeway on-ramp?

Here is a page listing several articles on mechanical problems. Read through the section engine performance to see if anything you come across sounds like what you've got:

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December 20, 2011, 8:37 am

Durwood K

It only happens when going uphill and when the transmission is about to shift to a lower gear. If I press the gear the accelerator it does not do it. Also, if I am paying attention and can tell it is about to shift and press the accelerator it doesn't happen.
At other times the transmission works smoothly and the problem doesn't occur.
Hope this explains the problem so you will have an idea of what the problem could be.
As for the question on the gas, the tank was lowered, the in tank pump was replaced with a new pump with strainer and the outside filter was replace with a new one.

0/0 users found this helpful.

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