Hi guys, can anyone recommend a starting point for common frontend issues on the rs250?
Still under warranty but the Cotech has been unable to find any major/obvious issues...
History:
Originally had a bolt snap on the front engine mount (I think) which is apparently common. Bolt was replaced, but the vehicle has degraded ever since. Now it may be related or not, can't say for sure.
Have had both lower control arms replaced along with shock mounts, and gearbox + torque link and cambelt side engine mounts (only the top one left to do I guess)
Explanation of issue:
So the car does some strange things:
-when pulling off, there is a noticeable lunge as the car rocks, especially once clutch bites and the engine torques, have almost eaten the steering wheel afew times.
-when pulling off at anything but dead centre, there is a jump laterally, especially pulling off to the right
-when doing a circle at low speeds, the car seems to jump/alternate between the left and right wheels, not constant/stable like it was originally
-noticeable torque steer on anything but straight line, slightly uneven roads send the car on random direction changes
-leaving the car to drive in 1st gear off throttle previously was rock solid, car now lunges as soon as the slightest change of throttle used (increased or decreased throttle); noticeable lunges when cruise control is used on highways as it adjusts throttle
-on an uphill as the weight is biased to the rear the frontend is very erratic, the smallest steering inputs while accelerating send the car sideways
Other info:
-So the car is a cup, hence it has the LSD, I guess play in the front axes will be EXPONENTIALLY more visible as the diff tries to steer the car in random directions.
-being an RS, we have the perfohub, so potentially its not the steering axis at fault but rather the other axis (what to call it?!?)
-hub carrier has all the anti rotation black magic stuff on it, maybe something there broken/missing/bent/loose
-I believe there are some serviceable bushes in the rack which are known to degrade?
Car is now just over 100,000km but issues started at around 60,000km...
Yes maybe been too patient with the techs...
So if anybody has any idea where to look, I am concerned we are making things worse with unnecessary trial and error part swaps.
Thank you all in advance for any suggestions!
Still under warranty but the Cotech has been unable to find any major/obvious issues...
History:
Originally had a bolt snap on the front engine mount (I think) which is apparently common. Bolt was replaced, but the vehicle has degraded ever since. Now it may be related or not, can't say for sure.
Have had both lower control arms replaced along with shock mounts, and gearbox + torque link and cambelt side engine mounts (only the top one left to do I guess)
Explanation of issue:
So the car does some strange things:
-when pulling off, there is a noticeable lunge as the car rocks, especially once clutch bites and the engine torques, have almost eaten the steering wheel afew times.
-when pulling off at anything but dead centre, there is a jump laterally, especially pulling off to the right
-when doing a circle at low speeds, the car seems to jump/alternate between the left and right wheels, not constant/stable like it was originally
-noticeable torque steer on anything but straight line, slightly uneven roads send the car on random direction changes
-leaving the car to drive in 1st gear off throttle previously was rock solid, car now lunges as soon as the slightest change of throttle used (increased or decreased throttle); noticeable lunges when cruise control is used on highways as it adjusts throttle
-on an uphill as the weight is biased to the rear the frontend is very erratic, the smallest steering inputs while accelerating send the car sideways
Other info:
-So the car is a cup, hence it has the LSD, I guess play in the front axes will be EXPONENTIALLY more visible as the diff tries to steer the car in random directions.
-being an RS, we have the perfohub, so potentially its not the steering axis at fault but rather the other axis (what to call it?!?)
-hub carrier has all the anti rotation black magic stuff on it, maybe something there broken/missing/bent/loose
-I believe there are some serviceable bushes in the rack which are known to degrade?
Car is now just over 100,000km but issues started at around 60,000km...
Yes maybe been too patient with the techs...
So if anybody has any idea where to look, I am concerned we are making things worse with unnecessary trial and error part swaps.
Thank you all in advance for any suggestions!