Skip the auto shop - Our mechanics make house calls

Q: Car jerks and stalls 1994 Oldsmobile 98

asked by on

My car has gone around 160,000 miles. When I drive it for about half an hour, it starts jerking and eventually stalls out. The dashboards shows the check engine light on. It will ocassionally start right away but there would be misfiring of the cylinder number one. Otherwise, I need to wait for a while and try restarting it when the engine is cooled down. I've had the codes read and the error code came up, indicating cam sensor issue. I went to a mechanic who had done may repairs, including cam sensor, air flow sensor, computer and timing chain replacement. Also, the harmonic balancer, ignition control module and gears have been changed too. The wiring is checked out as well. The car has no troubles overheating. What should I do?

This sounds like the cam position sensor is failing. The sensor gets "hot" during your drive, fails, and the engine uses the crankshaft position sensor as a fallback mechanism. This is less precise timing, and results in a rougher-running engine (hence the misfire indication). If you would like to have this taken care of, enlist the help of a certified mechanic to inspect the jerking and stalling issue in order to have this corrected.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine won't start and it's a fuel related problem because I can spray starting fluid in the throttle body and it starts.

It sounds like you may have an air leak present in your EVAP system. When an air leak is present in the EVAP system, the MAP (Manifold Absolute Pressure) sensor will not be able to determine the air density, and...

Q: Do i really need to replace the ignition coil?

There are ways to test the output of the coil before it reaches the distributor cap. Usually, if there is a problem with a spark plug wire, spark plug, or distributor cap, the problem is consistent. Those parts can...

Q: Transmission Lurching Issues?

The lurching is not caused by a fault in the transmission. Rather, the misfiring is probably the cause as the engine periodically gains and loses power as the misfiring occurs. Diagnostic Trouble Code P0301 means that Cylinder No. 1 is...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...