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Category: Volvo
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I have a Volvo XC90 with 154,000 miles on it. The problem is

Customer Question

I have a Volvo XC90 with 154,000 miles on it. The problem is intermittent juddering (poss misfire) for a few seconds every several miles on level road, or uphill but not often downhill and never at idle. If I take my foot of the gas it stops. There is no check engine or other warning lights and I had a mechanic plug in a computer but not problems were found.
Submitted: 9 months ago.
Category: Volvo
Expert:  AMEDEE replied 9 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  AMEDEE replied 9 months ago.

The most common cause for this condition would be faulty tune up components. Any secondary ignition component can go bad causing the engine to misfire intermittantly and may not even light the check engine light dpeneding on the circumstances. Also, Interference can get into the Crankshaft Position Sensor from a poorly grounded block or a charging system problem so be sure to check the alternator, battery, engine and frame grounds. Last but not least, some other possible causes would be a bad oxygen sensor or mass air flow sensor.

Expert:  AMEDEE replied 9 months ago.
Good afternoon. I see you have viewed my last reply but have not responded back. I am just checking in to see if you have any further questions or to see if you still need help with anything? If so, please let me know as I will be happy to help. If I have answered all of your questions, please dont forget to honor the good faith rating system to complete this conversation. Thank you and have a great weekend!