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Messages posted by: John Jensen
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Thanks GDE, that's definitely good to know. Is this possible because of the tune or is it applicable to all Ecodiesels, tuned or not?

By the way, your tune is everything it's advertised to be and then some, much appreciated!
On another forum discussing DEF life a member said, "GDE tune will still inject DEF, but it doesn't care what the mixture is. Hint, you can water it down, or I run water directly."

Is his statement regards the GDE tune and DEF correct?
BrianS,

You said, "California doesn't really do a "smog test" on diesel's. Its more of a visual inspection to insure you haven't messed with any "smog" parts and when the engine is revved up you don't blow black smoke out the tail pipe. If the probe is used no acual "smog" values are taken or used in the report."

That was the method when California first started diesel smog testing. It's no longer a simple "look and see" process. They now "plug in" and take readings. That's how they knew my EGR sensor was not working. They also are adamant about any aftermarket parts. If they are not "certified" with a sticker in place the vehicle fails the test.

By the way, California never used the exhaust probe on diesel engines. I've been told the diesel exhaust damages the probe.

I don't mean to contradict you, just trying to keep the info current for anyone reading the post.
GDE,

I believe you but I had an experience that makes me ask the question why yours will pass and other tunes that turn off EGR will not pass Calif smog test.

My Ford 6.0 diesel has an SCT tuner and the tunes turn off the EGR. I forgot to return my tune to stock when I took it in for the Calif smog test. It failed, the tester saying they did not get any signal or reading from the EGR sensor.

I returned home, replaced the tune with the stock tune, went back to the smog test and it passed, no problem.

Does your tune somehow allow the smog tester to see or get a valid reading? If so, how then is it turning off the EGR?

Thanks for reassuring me.
 
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