I have a 2005 3.2l V6 baseline model with 80K. It just started to have intermittent rough idle problem as the temps got colder. It set some codes for miss firing on all cylinders. The missing might be from cold startup or more likely after a restart once the car was at operating temps.
I took it to the dealer (whom I trust but have some big miss-givings about his shop personal - even before this).. they told me what the codes told them about the mis-fire and said I should take it home after they resetting them. I told them it will start doing it again and shortly got another phone call saying the tech took it for another ride and yes it was missing now.
At pickup that day the tech told me (and I may have lost some of the conversation here or be mis-quoting a bit), that he found the valve timing was out which had caused the missing in all cylinders. The intermittent nature he stated was caused by an intermittent oil blockage a mechanism designed to alter the valve timing. They said the contaminants could be caused by not changing the oil frequently enough or from short distance driving conditions. I don't live far from work or where I drop my kid off for school so I do, do a lot of short hops.
They said they had put Sea foam into the oil and asked me to take it for a good drive for 200km bring it back and they would change the oil. If that didn't fix it then I could either "live with it" or be in for a major job to clean out the orifices which would involve dropping out the motor as the area was inaccessible to work on.
So I can't find anything related to such a timing system for this engine in my google searches, I'm seeking input from the forum. I am a small engine mechanic by trade but haven't done an work on car motors for 30 years. There was no such system that advanced valve timing involving oil pressure back then so I'm skeptical. But there have been many advancements of course in engine tuning since.
Any input greatly accepted, before getting a second opinion.
I took it to the dealer (whom I trust but have some big miss-givings about his shop personal - even before this).. they told me what the codes told them about the mis-fire and said I should take it home after they resetting them. I told them it will start doing it again and shortly got another phone call saying the tech took it for another ride and yes it was missing now.
At pickup that day the tech told me (and I may have lost some of the conversation here or be mis-quoting a bit), that he found the valve timing was out which had caused the missing in all cylinders. The intermittent nature he stated was caused by an intermittent oil blockage a mechanism designed to alter the valve timing. They said the contaminants could be caused by not changing the oil frequently enough or from short distance driving conditions. I don't live far from work or where I drop my kid off for school so I do, do a lot of short hops.
They said they had put Sea foam into the oil and asked me to take it for a good drive for 200km bring it back and they would change the oil. If that didn't fix it then I could either "live with it" or be in for a major job to clean out the orifices which would involve dropping out the motor as the area was inaccessible to work on.
So I can't find anything related to such a timing system for this engine in my google searches, I'm seeking input from the forum. I am a small engine mechanic by trade but haven't done an work on car motors for 30 years. There was no such system that advanced valve timing involving oil pressure back then so I'm skeptical. But there have been many advancements of course in engine tuning since.
Any input greatly accepted, before getting a second opinion.