So I have this vibration when accelerating. Here's the story. I replaced the clutch in my b16 swapped ED4 last week, and everything was cool. Then about two or three days later I got this vibration under acceleration. So I decided that I must have lunched an axle so I replaced both... Still there! So I searched and found that it could be anything from intermediate shaft to bad wheel bearings to bad reman axles. Does anyone know for sure what the hell is going on here?? Please guys help me I checked everything I can think of (motor mounts, axles, bearings, ball joints, tie rods, wheels, tires) Every thing OK. It wasn't there, then it was. WTF! I'm losing sleep please help!

Tia, Bob

'90 ED4 B16a cable
avid mounts
'90 integra axles and intermediate shaft
Exedy stage 2 & flywheel

'03 EP3
'90 ED4 (aka 4 doors of fury)

 

Does it happen at all speeds when accelerating? Is it gone when you're just cruising?

 

Does it matter if you are accelerating straiht, turning left, or turning right? Does it do it under hard deceleration like downshifting into 2nd at 50mph?

 

Only when accelerating not when turning or coasting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El_Capitan &raquo;</TD></TR><TR><TD CLASS="quote">Only when accelerating not when turning or coasting.</TD></TR></TABLE>
So not when accelerating AND turning, right?

 

Accelerating in a straight line no turning Only vibrates under a loaded condition

 

Hmmm, weird. How fast is the vibration? Is it fast like a buzzing sound, or is it a shudder at about engine speed, or is it a thump thump thump at wheel speed? Can you describe it to help us narrow it down? Also, does it change when you shift gears or does it sound the same in every gear?

 

Well it only seems to do it in the lower gears (1st 2nd 3rd) it not really a noise just a bad vibe. the steering wheel shakes and if you really get on it the dash shakes. BUT you get it into 4th and 5th it kinda goes away. I kind of leaning towards a motor mount of half shaft but I just don't know...


Thanks for responding

 

The only think I can think of besides another bad axle (known to happen with Autozone remans) is that the exhaust or another part of the drivetrain intermittently touches part of the chassis when the engine torques. Especially check the exhaust. It's been known to make some reeeeally weird vibes when it rubs stuff. Let us know if you find it.

 

double check your motor mounts.

 

Did it vibrate before you replaced the clutch in it?
Make sure you have the correct axles?
Get under your car and check your interimediate shaft to see if it has any play in it.
Like he ^ mentioned check your motor mounts.

 

did you break your clutch in properly. if you didn't you could have glazed it over and it could be skipping(or grabbing, letting go, grabbing, letting go)

 

i got the same problem its the passenegr side axle for me. i snapped it off the line and worse into 2nd racing a 00 ws6 trans am.

vibrates under acceleration and when you go faster it goes away. after more hard driving of a month it got worse and started clicking when turning left.

 

im having the same problem...my axles are fine...it started happening after i replaced the motor mounts and put on a different exhaust manifold...so right there i have two things to check...hopefully that helps you narrow things down...

 

Well I took it back apart this morning re checked the intermediate shaft the bearing seems rough and there seems to be a lot of play in the rubber surround that contains it. So I'm gonna get another one and try that. I ALSO found that the rear motor mount l bracket was just barley touching the rear cross member. So I will try and shift the motor around fix that . I really appreciate all your help guys I'll let you know how it turns out.

 

check for warped rotors and pads... are the wheels balanced properly?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El_Capitan &raquo;</TD></TR><TR><TD CLASS="quote">I ALSO found that the rear motor mount l bracket was just barley touching the rear cross member. </TD></TR></TABLE>

Sounds like the problem right there.

 

I would guess the exaust I have the same problem, it vibrates at 15, 25, 35, and 45. I think the vibration of the engine and the weird angle the exaust sits after my ZC swap is causing it, I'm cutting a section of exaust out and welding it back together this weekend. Hope it works.

 

So here's damn deal, changed out the intermediate shaft. Still vibrates so I'm down to motor mounts and no matter what I do I can't get the rear mount bracket to not touch the cross member. So that has to be it. Does anyone know where to get hasport mounts cheaply? Cause I'm ready to buy.

Thanks guys for all you input!

 

ebay would be the cheapest route

 

did you rule out wheel balancing? I had a vibration problem when ice would build up in the holes in my older teg sawblades I have on the rex. for some weird reason, it only did it under acceleration.

 

Tires will cause a vibration as well and def. cause the steering wheel to shake. Any chance that a weight came off when you were doing any repair to the vehicle??

 

it is definitely not the tires (I work at major northwest tire company) That also was the first thing I checked. I'm fairly certain it is the rear motor mount as no matter what I do it still rubs on the cross member. Thanks tho

 

It's over! It did in fact turn out to be the motor mounts. The rear mount was completely messed up. All I have to say is hasport mounts are Cool and I should have used them in the first place. Thanks for all your help guys

 

ha...i just redid my rear mount tonight...ill find out tomorrow when i go for a drive...