Q: Shuddering, check engine light on. 2005 Saab 9-2X

asked by on

My car started having some problems after several repairs have been done. These included the water pump, AC belt and timing belt kit replacement, along with the front camshaft seal, alternator belt and power steering belt change. About a month later, the car developed a misfiring issue on the third cylinder which I found out about at the mechanic's. The car would shudder at higher speeds. The dash shows a check engine light on as well. The mechanic also found the compression was as low as 21 PSI. What could cause this? Have the previous repairs maybe caused this problem?

Hello. It is possible that the previous repairs could cause this problem. It is also equally possible that the new problems are not related to the previous problems that you were having. If the timing belt is not on the proper timing, it could cause a misfire condition and low compression in the engine. There also could be a problem with the third cylinder of the car. The valves could be burned or the piston damaged. If this is the case, it would be necessary to have the entire engine replaced or rebuilt. If you need help scoping out the problem, have a certified technician, like one from YourMechanic, come and inspect the Check Engine Light and the timing for proper alignment.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Shuddering, check engine light on. 2005 Saab 9-2X

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: Battery is dead and when I jump it it runs but after I turn key off it won't start again

Jump starting a vehicle relies on the "jumper car" and not the car that is dead. By using the jumper vehicle, your battery gets power from the other car. Once your car is running, if the battery is good, it...

Q: Radiator flush advantages

You should have a mechanic like one from YourMechanic come to you and do a test on the cooling system for losing coolant from the engine. The mechanic will pressure test the complete cooling system and cap to see if...

Q: I have 01 Hyundai xg 300 and I think its leaking oil by the water way to fast. It started smoking by the front passenger side by the belt.

Check the engine valve cover, the engine oil cooler lines, and the front crankshaft seal. Look to see where the engine oil is leaking from and see if the part is serviceable or not. If the front engine crankshaft seal...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...