Anyone with any insight, please feel free to comment.
This vehicle came from another shop, complaint is that it won't run monitors fo the IEPA emissions test.
2007 Chevy Express Van 4.8 VIN V. G-2500 I believe.
When it came to me, the O2 Heater was ready, so, I knew it could set some readiness. It wasn't "forgetting" monitors either, due to a KAM problem . Later I find out that it sets a trans code, and the other shop would erase the code, which usually came up on a long drive.
So, with the O2 Heater already ready, I do the GM idle catalyst monitor right in my lot. OK, 2 out of 4 monitors ready! WTF!!?! Could it be this easy? I figure all I need to do is get it on the highway and run the O2 monitor, right? Forget about that. After a half hour, it sets a pending code for the trans and The O2 monitor never runs. GM O2 monitors have gotten very difficult in the last 8 years or so...
Well, since this is for another shop, I call them, but they say any trans repairs are out of the question. I say OK, then the Evap monitor is my only other chance.
This week we are in the high 90's and over 100F part of this week, so GM EONV is not able to run above 85F. So, I turn on the AC in the shop and let her "cold soak".
I get out my Tech2 check fuel at 21% and after a few attempts, I get the engine running portion of the ESBT test to run and I am directed to drive 9 miles and 800 seconds, so I do, keeping the trans from straining and slipping. The trans code did not reset.
I finish the driving portion and The Tech2 directs me to "return to Service Bay" to begin the engine off portion. I shut the vehicle off and this message come up:
2012-07-06 Tech2 EONV test denied 2007 Express 4.8 001.JPG
Does anyone know more about the fuel level requirement? I saw 15-85% as the requirement for this vehicle's EONV testing in Alldata.
All I can think of is that the fuel level slips below 15% during the drive? I started with 21% and it shows 19%. This is a large fuel tank, very large, near 60 gallons I think.
Until I can get this squared away, I don't see this thing passing soon. I did add more fuel, but I suspect a bad fuel level sensor because it doesn't want to take over a few gallons and kicks the fuel fill nozzle off at the gas station. The vent valve is not stuck, and it passes the Engine running part of the test.
Thanks, Bob
This vehicle came from another shop, complaint is that it won't run monitors fo the IEPA emissions test.
2007 Chevy Express Van 4.8 VIN V. G-2500 I believe.
When it came to me, the O2 Heater was ready, so, I knew it could set some readiness. It wasn't "forgetting" monitors either, due to a KAM problem . Later I find out that it sets a trans code, and the other shop would erase the code, which usually came up on a long drive.
So, with the O2 Heater already ready, I do the GM idle catalyst monitor right in my lot. OK, 2 out of 4 monitors ready! WTF!!?! Could it be this easy? I figure all I need to do is get it on the highway and run the O2 monitor, right? Forget about that. After a half hour, it sets a pending code for the trans and The O2 monitor never runs. GM O2 monitors have gotten very difficult in the last 8 years or so...
Well, since this is for another shop, I call them, but they say any trans repairs are out of the question. I say OK, then the Evap monitor is my only other chance.
This week we are in the high 90's and over 100F part of this week, so GM EONV is not able to run above 85F. So, I turn on the AC in the shop and let her "cold soak".
I get out my Tech2 check fuel at 21% and after a few attempts, I get the engine running portion of the ESBT test to run and I am directed to drive 9 miles and 800 seconds, so I do, keeping the trans from straining and slipping. The trans code did not reset.
I finish the driving portion and The Tech2 directs me to "return to Service Bay" to begin the engine off portion. I shut the vehicle off and this message come up:
2012-07-06 Tech2 EONV test denied 2007 Express 4.8 001.JPG
Does anyone know more about the fuel level requirement? I saw 15-85% as the requirement for this vehicle's EONV testing in Alldata.
All I can think of is that the fuel level slips below 15% during the drive? I started with 21% and it shows 19%. This is a large fuel tank, very large, near 60 gallons I think.
Until I can get this squared away, I don't see this thing passing soon. I did add more fuel, but I suspect a bad fuel level sensor because it doesn't want to take over a few gallons and kicks the fuel fill nozzle off at the gas station. The vent valve is not stuck, and it passes the Engine running part of the test.
Thanks, Bob
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