Q: Car shudders and idles low - 1992 Toyota Cressida

asked by on September 27, 2016

My car has been shaking while it's stopped in the traffic. It idles at 600 RPM on average. When I continue driving, it shudders again when I reach the speed of 35 mph and over. This shuddering is a bit unusual because it's as if there is some loose part or if there is some kind of restriction in the fuel system. Do you have some advice on what I should check and replace?

It is possible that this is a misfire condition either due to a faulty ignition system component or fuel injector that is creating a power imbalance that will cause a shudder sensation. The fuel system and ignition system should be checked along with the induction system for unmetered air leaks. Crankshaft position sensor signal should also be looked at as the loss or interruption of this signal can cause rough running issues as well. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose this rough running issue and assist with proper repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Car will not start when the engine is hot.

Hi there. If there is fuel and the engine will not start up when it is at operating temperature, then either the crankshaft position sensor is getting hot and not making a connection or the coolant temperature sensor is malfunctioning...

Can I adjust the clutch on a 1992 Ford Ranger with a hydraulic clutch,if so, how?

Hi there. It is possible to adjust a hydraulic clutch, but only if you've bled the lines fully. This video shows how to adjust the pedal. If you can smell clutch dust, it's more likely that clutch discs are burning...

Rough idle and stalling with exhaust popping

The first thing to do is to get rid of the oil type air filter. This oil bath type filter can cause the mass air flow to be contaminated with the oil from the filter you are using. You should...

Which oxygen sensor usually fails first? I don't have a code reader to tell which one is bad.

Hi. In my experience, I haven't really seen one oxygen sensor fail more than the other one. Considering the year of the truck, I would replace all the oxygen sensors on the truck because, if one is going bad, then...

I just bought a new battery, but periodically, my car would not start, this was in late winter.

You may be right about some kind of drain, or it could be that the alternator is functioning, but is weak. Either way a charging system test should reveal the problem. A technician can hook an ammeter up to the...

I think a GPS tracking device has been placed on my car into the wiring underneath dashboard panel

As you may know, GPS tracking devices are "sometimes" surreptitiously installed on motor vehicles by law enforcement. Typically though, these are exterior (underbody) installations and the practice is not all that common. Nevertheless, as we would have no way of...

Engine damage after oil change

Your question poses two general issues, the first relating to auto mechanics and vehicle reliability and the second to your legal rights. Let me first deal with the first issue inasmuch as a resolution of that may make the second...

Car starts then immediately stalls out.

Hi there. Check the engine oil level and make sure that it's full. Top off the oil if it's low and recheck to see if the engine is still stalling. The symptoms that you describe are as if the engine...

Engine check light, rough idle, loss of power.

Hello. If your filter is over oiled and the oil got onto the hot wire of the air flow sensor, then that can cause it to burn out. A scan tool could be used to check the reading of the...

Related articles

Symptoms of a Bad or Failing Throttle Body Temp Sensor
Common signs include poor engine performance, stalling, and broken electrical connections.
How Long Do Wiring Harnesses Last?
Car wiring harnesses connect all the different electrical systems and components in a vehicle. Wiring harnesses can last the lifetime of the vehicle.
Can a Bad Sensor Prevent a Car From Starting?
If your car isn't starting or has a hard time starting, a faulty sensor may be to blame. Car sensors monitor data to keep your car running smoothly.