Ford Focus ST Forum banner
1 - 15 of 15 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter · #1 ·
Just got done installing a Cobb motor mount and I'm getting this weird vibration when I take off on 1st gear or when my rpms idle down. Assuming it's not that something is lose (double checked on that already) could it be a sign of a bad/fake motor mount? Or even something else
 

·
Registered
Joined
·
7 Posts
Discussion Starter · #5 ·
The vibration will go away, remember its new. I also have the COBB RMM.

COBB is usually they worst at Idle? What information are you basing this off of? Hook us up with some info.
how was your ST when you 1st made the switch to COBB RMM? I drove from work and back and it got better but I'll be keeping an eye out for it
 

·
Registered
Joined
·
371 Posts
When taking off you will have to have your RPMs a tad higher, the mount should break in around 1,000 miles and it will feel like the stock mount again. So no issues with it!:D
 

·
Registered
Joined
·
660 Posts
I have the FSWerks front stress bar which also seemed to help with this. Also, I have the Cobb rear motor mount and all of the above information from the other users is valid.
 
  • Like
Reactions: Blackula

·
Premium Member
Joined
·
2,525 Posts
I have the FSWerks front stress bar which also seemed to help with this. Also, I have the Cobb rear motor mount and all of the above information from the other users is valid.
2nd this^ I have the TB performance front traction bar which is the same thing and vibes are there but minimal to where passengers won't notice.
 

·
Registered
Joined
·
9,129 Posts
I have the FSWerks front stress bar which also seemed to help with this. Also, I have the Cobb rear motor mount and all of the above information from the other users is valid.
But there's only accusations, I've not seen any information.
@revolvingrain
For the first month or so you'll be hearing vibes when turning on A/c, that comes through the dash area, it goes away during accel. If you're tuned a tuner can usually provide correction on idle RPM when stopped. I had my idle sitting at 900 rpm when stopped or at a light sitting waiting. This can help with vibes. I was not bothered by vibrations since this is a manual transmission vehicle and they are ALL KNOWN TO VIBRATE at some point or another in a car's life span. If it really gets to you, turn on music this is a easy fix until it breaks in, or you can focus on driving, this usually takes attention away from that distraction. Also go on long drives, no where to go? So what; this is an option that also helps break in the product. The main thing is, like in life, be patient with it and you'll soon notice things have gone back to normal.

A bit of quick information.
 

·
Premium Member
Joined
·
358 Posts
hello i have a question about the cobb rmm. i bought one and was wondering if mine is fake the bushing in mine is like a hard plastic is this normal?
Yes this is normal. Thats one if the points of the uograded mount. the bushing isnt squishy like the OEM mount.
 

·
Registered
Joined
·
147 Posts
Had my Cobb RMM in for 2k miles and still vibrates like crazy at idle with the AC on, I'll reevaluate it after my TB gusset traction bar shows up. If that doesn't help I'll ditch my Cobb for another brand, most likely Cpe. In all honesty this RMM is too stiff, I'd even just settle for not having my rear hatch window shaking at red lights even.
 

·
Premium Member
Joined
·
358 Posts
Look into the mountune rmm as well if you decide to switch. Many people are happy with the NVH of this mount.
 

·
Registered
Joined
·
147 Posts
Slight update, had my car custom tuned by stratified finally. Full stage 2 and everything else that is bolt on, A+ on the tune and the best part; my RPM at idle is 75-100 less. This leads to lower vibrations that are non existent essentially. So I'm putting the issues as a combination of over aggressive OTS idle, combined with a stiff RMM. It'll only get better with the traction bar, so take this with a grain of salt.
 
1 - 15 of 15 Posts
Top