First Gear Lurching / Surging

[xxxJohnBoyxxx]

Get some video. It should not be chirping the tires unless you do a left foot slide off the clutch pedal otherwise a slam shift.

[salguod]

Here's some video, not the greatest but you should get the point. I tried using the YouTube button, but it didn't seem to work, so I just posted links.

First, moderately aggressive throttle, turning left. You may have to turn it up to hear the engine surge but you can see the car lurch and there's a tire chirp there on the last jump.

https://www.youtube.com/watch?v=MhjHtgL222Y

The video actually makes it look less because you can't feel the car jumping. As you can see I got out of it pretty quick because it just feels horrible. It's actually been worse than this and sometimes it simply doesn't do it.

Next, starting off again turning right. Similar acceleration but very little lurch.

https://www.youtube.com/watch?v=8mYCHSaV8pk

Most of the time there's nothing going right. In a straight line it's in between.

It's driving me nuts as it could be lots of things, but I don't know what it actually is.

[salguod]

Still haven't figured this out yet, but I've learned more and I'm leaning toward engine / trans mounts.

With the cold weather coming in I've found that it doesn't lurch near as much in the cold. Also, I've got a very leaky oil filter housing (about 300 miles to the quart) and the entire underside is coated with oil. When I mentioned this to my friend who was a chassis engineer for Honda he said that it sounded like a rubber bushing problem and that oil will degrade rubber.

You might remember that I said the trans mounts were pretty soft. They are almost marshmallow soft - and coated in oil. I'm assuming that they aren't supposed to be that soft, right?

I've got the new gasket & o-rings for the oil filter housing, once that's fixed I'm thinking trans mounts are next.

[xxxJohnBoyxxx]

Engine mount driver side is completely torn, passengers side most likely torn and trans mounts including Guibo need to be checked.

John S

[paul somlo]

Originally Posted by salguod

Ahead of the transmission cross member was a lighter duty bracket with two torn rubber mounts on it. Obviously, whatever had been there was gone. Some kind of splash sheild maybe?

I believe that's a support bracket for the exhaust.

[salguod]

Originally Posted by paul somlo

I believe that's a support bracket for the exhaust.

That's what I was thinking, but there's no brackets on the exhaust itself nor is it loose.

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[xxxJohnBoyxxx]

Dude check the engine mounts, Guibo and trans mount. Although this is a internet guess I bet it is the issue. I reviewed the video and it shows classic sings of multiple torn mounts. I bet the Guibo is trashed...

John S

[salguod]

Engine and trans mounts have been ordered. The giubo looks like new, trans mounts are mushy, but not torn. Hard to get a good look at the engine mounts, but for $50 I might as well change them.

Parts come next week, hope to change them out the following weekend. This weekend is the oil leak at the oil filter housing.

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[xxxJohnBoyxxx]

Originally Posted by salguod

I would agree about the engine mounts, except I'm not seeing excessive engine movement when I hold the car and rev the engine in 1st gear. If the engine is shifting, it ought to do so then as well.

Oh, and it's not a lag, it's hard, tire chirping, lurching. I should try to get it on video.

I should have the car up this weekend to change the control arms, I'll check the lash then.

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You will not see the motor move unless you take off the hood and then drive it, there is no way to do it unless you are driving make it buck or lag as you state. Also check that Guibo they are famous for doing exactly what you got going on, when you are under the car checking the Guibo check the trans mounts. I bet you find the issue by looking over all mounting points on trans, driveline and engine. The engine moving around can even cause the accelerator cable to pull the throttle body open causing your issue. I've got a good idea from your videos what is happening.


Good to see you are changing the motor mounts...Just read the post above so I'm adding these comments.

Double check trans mounts with a jack under the rear and push trans up. The trans mounts will look good even when they are torn since when they tear on the bottom they fall right back in place making them look like they are good, also check drive shaft mid bearing and the differential for excessive lash.

What happens if you rev the motor up higher and let the clutch out slower? Does it still buck and lurch?

Best, John S

[salguod]

Originally Posted by xxxJohnBoyxxx

Engine mount driver side is completely torn, passengers side most likely torn and trans mounts including Guibo need to be checked.

John S

You nailed it. Driver's side mount was completely separated, but the passenger side was actually still good. Changed the trans mounts too, they were definitely soft compared to the replacements, likely from all the oil that was leaking from the oil filter housing. That gasket, bushing & o-rings were changed as well. As I said before, the giubo looks like new.

I've only driven it about a mile so far, but the lurching appears to be gone. Hopefully I've cured the 300 mile to a quart oil consumption too.