How can I tell if my car is having a shudder?
How can I tell if my car is having a shudder?
The use of the CH-51450 PicoScope automotive oscilloscope and the CH-51450-A NVH kit can help confirm the disturbance frequency and determine if the disturbance tracks to engine speed (chuggle or misfire), road speed (tire vibration), or remains constant across various inputs (TCC shudder).
How can I tell if my torque converter has a shudder?
To confirm TCC shudder, the vibration concern must be present in normal operation, but not present with the torque converter clutch disabled or with the torque converter clutch locked. Also perform a TCC slip control test. If TCC shudder is present, a vibration peak will appear at approximately 43Hz +/-3Hz. (Fig.
What’s the vibration frequency of a TCC Shudder?
If TCC shudder is present, a vibration peak will appear at approximately 43Hz +/-3Hz. (Fig. 18) If the vibration frequency follows engine, tire, or driveshaft speed, then it is not a TCC shudder vibration. An alternative diagnostic for TCC shudder is to road test the vehicle and monitor commanded and actual TCC slip speeds.
When does the torque converter start to shudder?
It generally occurs at part throttle and light acceleration, between 15 and 50 miles per hour, just before the shift to one of the top gears where the converter reaches “lock-up.” Since it is temperature-related, it tends to happen on hot days, after idling in traffic for long periods of time.
The use of the CH-51450 PicoScope automotive oscilloscope and the CH-51450-A NVH kit can help confirm the disturbance frequency and determine if the disturbance tracks to engine speed (chuggle or misfire), road speed (tire vibration), or remains constant across various inputs (TCC shudder).
If TCC shudder is present, a vibration peak will appear at approximately 43Hz +/-3Hz. (Fig. 18) If the vibration frequency follows engine, tire, or driveshaft speed, then it is not a TCC shudder vibration. An alternative diagnostic for TCC shudder is to road test the vehicle and monitor commanded and actual TCC slip speeds.
What causes the Check Engine light to illuminate?
Engine surging will cause the Check Engine Light to illuminate. (Photo Source: rd) Whatever the cause, if your car’s engine is misfiring or surging, your OBD-II Diagnostics system will show error codes and the Check Engine Light will glow on your dashboard.
Why does my car shake when I Turn on the Check Engine light?
If you have worn spark plugs, your engine might misfire, which causes shaking or vibrations. If you have a faulty spark plug, you should have a check engine light on your dashboard, but that doesn’t always happen. The good news is that spark plugs are cheap, but you should replace them all if one goes bad.
What causes a shudder in a torque converter?
A torque converter shudder vibration may be induced by the torque converter clutch in normal driving mode (with an expected TCC slip amount) and is most often due to TCC friction material/ATF degradation).
When do you feel the shudder in your car?
The shudder vibration may be noticed mostly during light throttle acceleration of 30-64 mph (48-104 km/h) during steady state driving with the transmission not actively shifting gears. It also may feel like driving over rough pavement or rumble strips.
Why does my car shudder with light acceleration?
Going 1 way out of my house, on flat ground, no problems with “light” acceleration. However, if I go the other way, which is an uphill w/ S curve, I definitely notice the “shudder” of the car, especially when cold. If you give it a bit more gas, then it’s OK.
Why does my EcoBoost shudder at sudden acceleration?
Sudden acceleration by the driver, changes the intake air flow rate through the CAC which causes the engine to pull in more air. With the moisture sitting in the intake tube, the engine is acting like a vaccum sucking up all this water. Depending on the amount of water that is sucked up causing…
Why does my CVT make my car Shudder?
I think its coming from the CVT when it does its low speed/mild acceleration shift-point shifting. When accelerating more briskly the shudder hasn’t been noticeable, although I seldom accelerate briskly due to intent to maximize fuel efficiency. Car now has ~4500 miles and the shudder has been present since new.
