View Full Version : Car Vibrates @ certain speed/rpm

14-04-2008, 09:10 PM
Hey Guys,

Hope someone can help me diagnose my problem...

Situation: Slight uphill, @ about 2.2k-2.5k revs....@ 80-85kmh

The car vibrates, when im accelerating...but when the vibrating starts.. i let go of the throttle and then the virbrating stops... and when i step on it again the vibrating starts again...this is only @ the speeds and rpms i mentioned above...

NB: Only happens in 4th gear.... say i manually shift to 3rd gear , and im still travelling at the same speed it no longer shakes..my mech friend says due to the lack of low end power?

Help guys? My car is auto btw..

14-04-2008, 09:12 PM
that could be it!

i have that same problem but it was hard to explain

i get it cruising along on flats though just slightly accelerating
at the same RPM my car vibrates accel more it stop shift back it stops....

my dad was thowing ideas out that it could be to do with the sussy....
cause mine seemingly occurs only over the slight bumps in the road

mines auto too

14-04-2008, 09:14 PM
Mine happens on flat roads too... just at those particular speeds/rpm/4th gear

14-04-2008, 10:00 PM
i think we're having the same problem lol i have a SRI installed but boxed and
ran ducting to it so i guess u can say CASRI, maybe the aftermarket intake is
causing the problem with the low end tourque???

have u got an aftermarket intake installed?

14-04-2008, 10:26 PM
wheel balancing ?

14-04-2008, 10:38 PM
engine mounts?

14-04-2008, 11:32 PM
i had after market headers on.. thought they were the cause for missing low end....2 days ago i put stock back on.. still have problem...and yes i have an aftermarket intake.....but doubt that is the cause..

h22a accord
14-04-2008, 11:46 PM
you may also want to have your inner CV joints checked out.

14-04-2008, 11:49 PM
labouring/lugging the engine; not enuff rev's

honda's make their power at high rev's. shift down if u have to cos it causes a lot of excessive wear

14-04-2008, 11:55 PM
The thing is... when i first got the car.. i didnt have this problem....seemed to only turn up after i changed the tires + headers + noticing cv joint boot was cracked and broken hahaha..oo not to mention i noticed cracks in the front engine mount ..lol

I would have all these changed and fixed if i had the money....but my sense tells me its not related to any of those things i mentioned above...though im prolly wrong -.-

14-04-2008, 11:58 PM
engine mounts, it can cause the engine to send vibrations through the car.

also yeh cv joints need fixing.

15-04-2008, 10:42 PM
also, if you change tyres without balancing that could cause it too.

so .. comes down to 3 things cv's, engine mounts or wheels.

16-04-2008, 08:30 AM
mate your driving a Honda not a V8 Commodore.... its a gutless POS at those revs... small engine capacity plus high weight plus the gearing you have in your car, means it doesnt have the torque required at those RPM's... if you want to be able to pull uphill at those revs then go and buy a car with a bigger motor

The above issue coupled with your engine mount and broken bits all over the place will make the symptom (vibration) worse... but you will never be rid of you motor struggling at those RPMS...