Just installed coilovers again. i'm know i need an alignment but just wondering if anyone had these issue. Everytime i go on a small bump on the road the car feels like it shifts like a fishtail feeling in the rear. anyone might know what the issue is??

 

You installed something wrong.

I don't know what "OEM type" coilovers are. List brand/type/model.

Either way, it's pretty obvious that something got messed up, unless you're exaggerating and this is simply a very bad allignment issue, which is possible. Did you install the proper Camber arms and toe bolts so that you can actually adjust the alligment?

 

how much did you drop it??

 

did you also happened to be installing other things for suspension like camber arms etc.?? because the only time something like that has happened to me was when my rear camber arm nut got loose and had fully adjusted negatively while i was driving

 

I dont have any camber kits. everything is stock except for the suspension. this is my 3rd time installing coilovers and i never had an issue with the 1st and 2nd. but now it has this issue.

 

Yea chu need an alignment

 

yea same thing happened to me. I think when I was installing the rear springs I might have loosened the toe bolts. I think I did it by pushing down on the cups that hold the springs in. I got an alignment and everything was good.

 

thinking alignment too..

 

How much are you lowering?

And yeah you probably loosened something by accident or just forgot to tighten something.

With stock parts, the most likely cause of this is either improper installation or something is loose/broken. Time to jack it back up and re-check everything.

 

I agree. you need to get back under there and look at everything also check and make sure that you have torqued every bolt under there to the proper torque specs (even the ones you didn't touch, cause you never know what could have happened.)
then take the car in for an alignment and buy a front and rear camber kit for it or you're gonna eat through tires like there is no tomorrow.
suspension upgrades on any vehicle is something that you have to go all out with and not be the cheap guy who doesn't buy all the necessary parts, cause that guy just ends up spending a lot more money down the road trying to get his mistakes fixed.
good luck on figuring it out.