2004 2.5T sudden loss of power, rough idle (timing belt slip, disintegrate) Topic is solved

[GlennSA]

Update from this afternoon,

After thinking about it more I decided to look at the mechanical rather than electrical aspects of the problem.

Haven't done a timing belt before but thought I would at least look to see if there is something suspect with the Cam timing.

Here is what I found...

When I pulled off the harmonic balancer here is what I found - The inner seal is perished and broken away.


Then if you look closely you can see bits of rubber everywhere in the bottom of the timing case and 'crumbs' all over



I suspect that this rubber has done the a round or two up to the top end and is a perfect size to fit in the timing belt teeth.


Then checking the Intake cam timings it looks like it is now a tooth retarded. Note the crankshaft is aligned with the timing mark above - From what I understand anyway.



And the exhaust cam two teeth retarded. I have marked the tooth with black texta but you can also make out the mark.



I will sleep on it now and see what anyone else thinks before I go and readjust the cams. I need a new harmonic balancer anyway.

Any other opinions from what you guys see?

Thanks for all your help to date...

[GlennSA]

Solved...

I got a second hand harmonic balancer for $20 and loosened the timing belt tension and adjusted the intake and exhaust cam so they lined up to the timing marks - took about 4 attemts lol. Rotated the engine over and noticed significantly more compression. Rotated the crank twice and timing marks were still aligned. Rotated twice again just to be sure and it was still in time.

So the moment of truth I started it and it purred smooth as a kitten with no fault codes.

Drove a couple times around the block and the engine definitely is more responsive than when I purchased the car a few weeks back. No fault codes at all.

Given that the timing belt has been through hell and may skip again I have ordered a new kit and will install in the next few weeks.

I think I know what I am doing now anyway.

Thanks again to the forum members for your help.

Glenn

[ggleavitt]

Second time something similar has come up in the last few months, can see this thread- viewtopic.php?f=10&t=83597#p456189 as well.

Good to note that the camshaft codes ECM-3000/ECM-340 (intake), ECM-3010/ECM-341 (exhaust) "too high and too low" refer to the position of VVT hubs as a function of TDC and the ability to execute the +/8 degree CVVT swing.

If an individual camshaft is off in orientation, the CVVT cannot go through its "normal" adjustment range and you get an error: too low if it's wrong on the TDC minus side, too high if it's on the TDC plus side.

This is an excellent example of where VIDA/DICE would have been indispensable, with a real-time view of the camshaft position(s) to correlate the error.

Glad you go it sorted out.