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Sedans Pontiac G6 Pontiac G6 Transmission
135 messages, Last post on Oct 25, 2009 at 7:55 AM
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Very interesting explanation... sounds like you might have the result the masses are looking for indeed. I suspect that eventually GM will issue a TSB on this one of course but that usually takes a long list of complaints and part replacements. How do you explain the use of synthetic oil causing the actual actuator fault that you are theorizing ? I can't recall if it was you that I read this from awhile back when I had the car, but I know when I changed the oil back to conventional the frequency of this issue did go down somewhat. We've since returned it (early lease end) thankfully, but I know this issue could creep up on our Pontiac Vibe too. The 2.4 Litre Toyota powertrain is a VVTi engine of course and using the same type of electronics too - I imagine they all do... I see the actuators and cam sensors off the side of it so who knows what may occur. Staying away from synthetic oil in it though and keeping it at the Toyota spec 0W20... at least the tranny won't bash into gear if it does decide to take the same route (5 Speed manual). Keep us informed & thanks.
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Replying to: dave06g6 (Jul 16, 2009 6:23 pm) I like that word, "bash". That is what it feels like. 1 time it actually slipped pretty hard into gear. It shook the car. Usually its fairly casual, and shows itself if you gradually get up to speed at decent rate. It does all of this about 75% of the time. I have filed a report, and Pontiac has called me, but they just state they need to have it back to the dealer. I am just so tired to going there and no duplicate. I have no time to take it now, or even within the next month. I am actually taking my car to Florida, 14hr trip. I am not worried, but will have the roadside assistants number as a back up. I am just frustrated, I almost wish it would get worse, of course after vacation, so they can actually feel something. Then I wouldn't feel like a moron! I am just so done with all of this. I want to be able to get in my car, be happy, and not worry if its going to shift weird. By the way...... This actuator, would I be able to just tell the dealer to look at this, this be the culprit? Is my engine a lemon? |
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Intake actuator solenoid not working (always open) will cause continuous oil to camshaft, cam advanced, eventually too much oil pressure which will cause hard shifting especially felt at low gears. Your car may also idle hard , and sound kind of like a 60s muscle car. If it's stuck closed cam maybe retarded , shift late. Purchase a new solenoid and see if it fixes your problem, they can be found on many sites and go for about $30. GM Part # 12628347. It's a 10min job , it is right on top of the engine and easily accessible. btw. are you using or used before synthetic oil? Any codes? |
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Replying to: sebastian7704 (Jul 17, 2009 8:48 pm) Also, I have noticed this. Simply start the car up, back it out of the garage in to the drive way, then turn it off. The engine roughly spins down, like shutters, lightly shakes off. It only does this if the engine is on very briefly, then its shut off. But, it will do this everytime if I were to do the above step. Why would this happen? What it causing this shudder or shake when spinning off. Could this have anything related with my engine shifting performance too? It just feels like something is keeping the engine from being its full potential. However, there are times, when it feels normal, but I have to get the feeling only by driving it a bit more aggressive, not hard, but with a little more pep. Drive it more slowly, then it seems to be more weird. |
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Replying to: sebastian7704 (Jul 17, 2009 8:48 pm)
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Replying to: djasper (Jul 21, 2009 5:15 pm)
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I figured it would be one of the two (actuators themselves or the wiring harness or both) quality assembly indeed... I don't know about yours but you can almost suspect it by the shoddy electrical tape that you can see along alot of the harness areas... just ridiculous. None of that on our new Vibe, everything is either shrink wrapped or inside proper plastic conduit... the Toyota way ? A friend of ours has a Matrix, built in a different plant but mechanically identical cars, same assembly quality from what we can see under the hood - clean and simple... it wouldn't surprise me in the least that this issue is going to cost consumers thousands in diagnostics and parts replacements, probably in some cases entire transmissions because of the abuse to automatics that this causes - before GM starts to notice a trend an issue a TSB on the subject to technicians. And people wonder how the industry got to the way it is now - shining examples are everywhere indeed. What a shame. Thanks guys for the input - I hope this topic provides alot of people with some insight into this problem across the internet, seems like an easy fix - almost wish I still had the car to prove the point even more... ok maybe not. Cheers. |
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Replying to: sebastian7704 (Jul 21, 2009 6:26 pm)
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Replying to: djasper (Jul 22, 2009 4:13 am) My is still there intermittently. I notice it! This is not normal! Its not bad enough now to really cause anything to be noticed by others. However, I feel it. I really notice after riding in an 08 Jetta SE and its so much smoother up to speed than mine. I am not worried about it as I am on a lease, its their problem, I don't plan to keep it much longer. However, it makes me mad and annoyed when I feel it! Dealer doesn't notice anything.
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Replying to: bvdj84 (Jul 29, 2009 3:52 am)
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