P0014 code

Post by **Sveedy** » 13 May 2025, 14:48

I'm trying to sort this code out. " Camshaft over advanced " . I read a current thread, including its attached link re flack angle, and have reset my exhaust sprocket 1 tooth ccw from its timing mark, while leaving the crank and intake on their timing marks. I did this by holding the vvt hub in tension and loosening the 3 bolts on the sprocket and turning it ccw till it's mark was one tooth before the mark on the cover.
Car runs fine except for idle, which hovers around 800rpm. But I still get the P0014 code which says " over advanced ". Do I need to retard the intake as well, or do I back off the tension on the vvt hub as well as the sprocket when retarding the exhaust side ?

Post by **abscate** » 13 May 2025, 15:15

I found it best to get a reader which reported cam flank angles and track the cam into the range of +-10 degrees.

It’s a single tooth that will not code on a VVT car

Post by **Sveedy** » 13 May 2025, 16:11

Well I kind of need a simpler solution. I'm not in the position to go buying readers or even VIDA right now.
Should the intake be retarded as well as the exhaust ? I don't feel comfortable taking the exhaust another tooth back.

Post by **Sveedy** » 13 May 2025, 16:38

Researching more and more, and I find it is a common problem that can be caused/fixed by various things.
So I'm not going to mess with the timing anymore right now. Get some miles on it and see how it does then.

Post by **abscate** » 13 May 2025, 17:34

Your 99 GLT has VVT exhaust , and non-VVT INTAKE.

set the intake with the mark dead on. It’s the exhaust that needs the one tooth bump.

If you set it on the mark after the 1/4 turn backwards it will run ok even if it codes

Post by **Sveedy** » 13 May 2025, 17:50

Ok so you are talking about the 1/4 turn backwards on the crank, correct ?
That step is the only one I haven't done. Didn't know about it till some recent searching. Seems a little counter intuitive, but I'll give it a try.
Thanks !

Post by **Sveedy** » 13 May 2025, 17:53

So I'm basically backing into the crank indicator ccw when first setting the timing. Then backing off the exhaust sprocket 1 tooth etc at that point.

Post by **Sveedy** » 13 May 2025, 17:58

I think I get it.

Post by **abscate** » 14 May 2025, 03:43

It’s in that thread.

The exhaust cam gear moves about three teeth relative to the cam lobes as the VVT functions. The index marks are designed to be set when the exhaust gear is twisted ccw to the cam fully, which you achieve by passing the mark , then coming back to it with the crank pulley. You get about one tooth of adjustment with the slotted m6 bolts on the gear face but those start in the middle of the range.

It’s a tight tolerance of one tooth on the 1999 model with exhaust VVT. one cam tooth is 16 degrees of crank angle so one tooth will code, and two teeth will be out of range of the sensor and disable VVT. I once fought one all afternoon until I got it right.

I think I’ve confused an issue here. The preset one tooth off is for getting the VVT hub onto the cam and the big Torx screw set. You are supposed to reset the marks before installing the belt. It’s not clear if you do that with the same 1/4 turn back or not got that procedure.

Post by **Sveedy** » 14 May 2025, 08:52

Well now I'm totally confused again. Instructions above seem clear enough, but when does the belt come off ? And if the markings correspond when you start and correspond again when you rotate backwards, then what's the point ? When/where/what are you adjusting at that point ?

So I turn everything ( cams and crank ) till all marks line up. Then go another 1/4 turn cw. Then backwards ccw till everything lines up again.
At that point I remove the belt and move the exhaust sprocket till its mark is vertical ? Seems like it would be in the same spot as when I started. But I'll give it a try.

Regarding the hub; I followed the same video posted in another thread when it came time to preload the hub. Nothing was said in that video about setting the hub 1 tooth off, and he was following the service manual completely. As I recall the hub was loaded cw and the sprocket set at that point. I'm really not interested in taking everything off of the backside of the engine again so I can install a cam locking tool etc. and fight that high torqueT55 holding the hub on the cam, while not knowing if It's wrong to begin with.
At this point I'm going to operate under the belief that I have the hub installed correctly.

I got to say that all this silliness is not making me love the 99my. Ignore the manual here, ignore this sticker there. Why they took something as beautiful as the 850 and screwed with it is beyond me. Another example of some engineer trying to justify their existence. Geez !