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Old 12-04-2013, 08:12 PM   #21
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After all my tweaking and setting the proper timing and idle. 12 @ 800RPM it failed a pre-check. 350+ HC at idle.

Ultimately I got it to PASS!

Stupid CA Smog. I tried to do it all the right way but manufacturer specs for the VG30I CA just don't like em.

Here's what I had to do.
Retard ignition to about 5% and raise idle to 1050 RPM which made the timing look like 12%. CA allows up to 1100 RPM for "idle" and 12 +-2 Degrees. Truck sounded like crap.

Here's the passing results:
Idle HC = 37, CO = 0.06
2500 RPM HC = 9, CO = 0.09

I promptly set my timing and idle back to normal 12 degrees, 800 RPM after getting my certificate.

So do any of you have low HC at 800 RPM, 12 degrees on a VG30I?

Last edited by tgramm; 12-04-2013 at 08:17 PM.
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Old 12-04-2013, 08:16 PM   #22
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Freakin' amazing!

If they ever start smog checking out here in the sticks, I'm sending a wagon out your way to fetch you over here.
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Old 06-08-2018, 05:55 AM   #23
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Looking back on old posts. I can tell you what was really happening now.

The timing was off. Looked right but wasn't.

When I did my timing belt I discovered the woodruf key on the crank sprocket had worn a grove in the crank and 50% of the key. So the sprocket was off about the width of the key. This was more than just timing, the crank was out of time with the heads.

I corrected the issue by grinding the crank a little deeper and longer then using a slightly oversize key. I then filled in the worn notch with instantsteel. The repair has held for a few years.
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Old 06-08-2018, 03:27 PM   #24
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how common is this woodruff key wearing issue?
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Old 06-08-2018, 03:55 PM   #25
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Quote:
Originally Posted by urimashe View Post
how common is this woodruff key wearing issue?
I have been on this forum for a while, and he's the first person I've ever heard of having that issue.

I wonder if his timing belt or timing chain slipped, causing his valves to crash into the pistons at some point.

That's the only kind of engine bind I can imagine causing that.
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