Skip the auto shop - Our mechanics make house calls

Q: Car shudders and idles low - 1992 Toyota Cressida

asked by on

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?

A: It is possible that this is a misfire condi...

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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Idle issue

Cylinder misfiring can be caused by: Ignition coil, spark plug, fuel injector, or a wiring issue to the coil or injector. By moving the coil from the misfiring cylinder to another and the misfire staying with the original cylinder, you...

Q: Alternator

Your car's alternator relies on the belt to power it so that it can generate and supply power to the battery. It will not turn on it's own without the belt on it. You may also want to consider checking...

Q: Car overheating and leaking oil

Hello, the first thing to do is check the oil level and get that correct and then diagnose the overheating concern. It will probably need to be jump started to get it going. The cause of the overheating must be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...