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Old 03-06-2011, 21:21   #1
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Volvo Model 2003 Misfiring

I have a 3 cyl volvo model 2003, engine is approx 25 years old. Has started to put out white smoke with unburnt diesel in the exhaust. It is not going through coolant and the oil appears clean so i dont think it is a head gasket or anything related to that. After changing all the filters and no improvement i decided the test the individual cylinders by opening the fuel pipe nut at the injector to see if all the cylinders where firing properly. When i did the test to the first and third cylinders the engine ran really rough and nearly died but when i tried it on the 2nd cylinder the engine did not change. I did these individually and allowed the engine to get back to "normal" between tests. What is the likely cause of this misfiring? Does it mean its time to call the mechanic to pull the injectors?

Thanks for the help
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Old 03-06-2011, 21:27   #2
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Re: Volvo Model 2003 Misfiring

Check your compression (leak down test is best) and if that is okay have your injectors checked. You could probably remove them yourself and take them to a diesel truck service center.
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Old 06-06-2011, 14:16   #3
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Re: Volvo Model 2003 Misfiring

Is there a fuel injector cleaner fuel additive that is worth trying for this?

Thanks,
Jeff
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Old 07-06-2011, 10:47   #4
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Re: Volvo Model 2003 Misfiring

Anyone....Will a fuel injector cleaner do anything for this?

thanks,
Jeff
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Old 07-06-2011, 11:27   #5
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Re: Volvo Model 2003 Misfiring

No you're wasting your time and money. Take the injectors out and get them serviced or replaced.
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Old 07-06-2011, 11:57   #6
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Re: Volvo Model 2003 Misfiring

Thanks, it appears that all the injectors are working properly, and this could be a compression issue. What would cause this lack of compression or is this an answer i don't want to hear?

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Jeff
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Old 07-06-2011, 12:08   #7
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Re: Volvo Model 2003 Misfiring

You're going to need to contact a diesel expert, and your probably not going to like his answer.

Could a valve be sticking??
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