Why does my Audi engine judder when I start it?
It cuts off air to the intake manifold when the engine is switched off to bring the engine to a halt without it scavenging whatever oil it can find after the fuel is turned off. Clearly it must open properly in order to restart, so its correct operation is important for starting too.
Why do idle RPMs go up and down?
The higher idle allows the engine to run while the air fuel mixture and timing are less than optimal. On the car with the idle that was going up and down, the ECU was likely trying to calibrate the inputs and output to get the idle where it needs to be.
Why does my car go up to 500 rpm after starting?
It restarts just fine right after though. It also has a rough idle sometimes, it could get to 1000 rpm after it starts, suddenly drop to 500, then go up and drop again. This only happens for a few initial seconds and only after a cold start. Any help appreciated, thanks.
What causes Honda EX L transmission to shudder?
Per ody blogs many other ody owners experiencing same problem. Honda will not acknowledge problem. 2007 Honda Odyssey ex-l-transmission is shuddering while driving at 30-40 mph. The problem seems to happen when I slow down then press on the gas again. It feels like I am driving over railroad tracks.
Why does my car shudder at low RPMs?
I sometimes notice it in lower gears at low speeds, and it happens on the highway for a couple seconds at a time pretty regularly if I’m cruising around 1,500 rpms. If I drop to 5th gear and get to around 2,000 rpms, the shudder goes away.
Why does my car shudder when going uphill?
Q: Car shudders when accelerating and going uphill, seems like a loss of power, particularly around 1500 rpms. When I’m accelerating sometimes my car will shudder or shake, seems like it’s coming from the engine area. It happens more often when I’m traveling uphill, but it sometimes happens in regular conditions.
What makes a torque converter shudder at low speed?
Torque Converter Shudder Problems. A torque converter is the fluid coupling between an engine and transmission that allows the engine to idle at low speed without engaging the transmission. A torque converter uses an engine-driven turbine (fan) to push fluid through a matching turbine attached to the transmission.
When does a GM Truck shudder under load?
It will usually do it under a slight load, and is most common between 1200 and 1500 rpms. It will do it for a couple seconds, stop, then do it again a couple times. Usually it’s not under load for long periods of time, but with traffic I notice it more often as I’m on the gas and off more frequently. Is there a loss of power?