I just had some tein s-techs installed on my Z. But for some reason, i'm feeling a rumbling/vibration when the car is started and when i step on the gas. I noticed my top plenum and some of my engine cover is hitting my font strut bar. I had a plenum spacer installed a while ago but that was installed correctly, with the stut bar washers/spacers. So i think this excessive rumbling is coming from the strut-bar and plenum grinding on each other. Anyone ever hear of this happening after a simple spring install?

I didn't do the spring install myself because i don't have the necessary tools.

 

check strut bar bolts.

 

What exactly am i checking for?

It seems like the car was lowered but the engine wasn't. It sounds strange...

 

did you check if bolt was tite enough?

 

Yes. I did a full walk through of the car, checking all bolts, gaskets, seals, etc. I'm almost positive the rubbing of the strut-bar and plenum is the cause of this vibration, but i never heard of this problem after suspension springs were installed.... Anyone heard of this?

 

did u check spring sit correctly?
check if springs fit correctly with upper mount

 

I'll have to check the setup. Its strange because now when i start the car, it starts up normal. And once i put it into drive (5AT), it makes that grinding noise. The noise is there when i accelerate too, but its not so bad anymore. The noise goes away when i let off the gas and just cruise. Very strange...

 

sounds not from springs, sorry can't help you more without hearing it.

 

I'm leaning towards the drivetrain now. Seems like the drivetrain is not aligned or is off causing this vibration while in gear. Taking it back to the shop first thing tomorro morning before work. Thanks for your help though...