Violent shaking when hard accelerating!

[jdmtrav]

So this started happening the other day. I was driving my AWD 1G and all of the sudden it started shaking pretty violently when I got on it. I am running about 20lbs of boost. I have a video if it will help... http://s51.photobucket.com/albums/f391/ae_dude_2001/?action=view&current=76d84686.flv

It does it in every gear except 5th and reverse. I am wondering if I have a problem with the clutch(ACT 2600), or if sounds more like a problem with spark or axles?

 

[freshlane]

Judging by your mods list it sounds like fuel cut. I am boosting 20psi stock and hit fuel cut on the eway from time to time.

 

[jdmtrav]

I thought it might be fuel cut, but I didn't know what fuel cut feels like. It would just feel like the motor is going to jump out?

 

[jdmtrav]

OK! It definately feels like something in the divetrain because I had it in second and let off the gas then gave it alittle gas again and it just shakes like hell. Could it be something with the clutch?

 

[freshlane]

ever find you what was wrong?

 

[viprez586]

OK! It definately feels like something in the divetrain because I had it in second and let off the gas then gave it alittle gas again and it just shakes like hell. Could it be something with the clutch?

Fuel cut is like hitting a brick wall or almost kissing the steering wheel.
What size injectors do you have?
fill your profile a little more, the more information you give us on your setup, the easier it is to give a diagnosis.

If you're not easing back into second of course you car is going to shake, especially second gear, think off all that power being flipped on and off like a light switch, The trans probably wont like it.

 

[Bigglesworth87]

If I were to make a guess, it would say to check your axles. Thats how my car felt when one of mine went out.

 

[pukrnukr]

Is your entire car shaking? Fuel cut doesn't really feel like shaking but more of a slam. I would check out your front axle/cvshafts, maybe balljoints. Make sure none of your front suspension components are broken or bent. I'm assuming your shaking is coming from the front. And then your timing belt. I had my timing belt changed and about a month later my car started shaking in most gears, if I was on the gas at all. I brought it back to the shop, they said my timing belt skipped. Not exaclty sure what they did, but they said they had to adjust the timing belt. Maybe it had something to do with the balance shaft. When I got my car back it ran totally smooth again. Someone who has changed a timing belt or balance shaft eliminator kit might be able to help you from here, and give you some advice what to look for.

 

[bighroder]

It also could be a motor mount, i dont have a dsm yet but my truck had a loose motor mount bolt and it shook real bad.

 

[a_flint87]

Is your entire car shaking? Fuel cut doesn't really feel like shaking but more of a slam. I would check out your front axle/cvshafts, maybe balljoints. Make sure none of your front suspension components are broken or bent. I'm assuming your shaking is coming from the front. And then your timing belt. I had my timing belt changed and about a month later my car started shaking in most gears, if I was on the gas at all. I brought it back to the shop, they said my timing belt skipped. Not exaclty sure what they did, but they said they had to adjust the timing belt. Maybe it had something to do with the balance shaft. When I got my car back it ran totally smooth again. Someone who has changed a timing belt or balance shaft eliminator kit might be able to help you from here, and give you some advice what to look for.

I would check the cv joints/axles, had this happen on a 95 gsx and had the exact same symptoms, happened at highway speeds and WOT with factory boost.

 

[Detail]

It also could be a motor mount, i dont have a dsm yet but my truck had a loose motor mount bolt and it shook real bad.

That's my guess.

Also if AWD, check your rear diff mounts, once the rubber is toast lotso vibration.