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The biodiesel gummed up the injection pump and they basically had to disassemble the entire fuel system and clean it. When the smoke cleared in the battle, the dealer finally warrantied the repairs.
Now, it hasn't been determined that the cause of the problems were biodiesel, poor filtering from the fuel company or some other contaminates in the fuel system.
But since the vehicle was running biodiesel from the time we received it, we can't imagine that it was any other contaminates.
On the other hand, we have several 05 F-350's, that are running B-20 without any problems at all.
Also, be aware that if you are in an area with low temps in the winter, biodiesel gels at relatively high temps.
B100 gels at considerable higher temps than diesel, while B20's gel point is much closer to diesel's gel point.
The biggest thing with biodiesel, as was pointed out, is to make sure the filtering system of where you are getting it and of the vehicle's is sufficient.
If so, what values does it show for the baro sensor?
What altitude are you at?
You need to make sure that the BARO sensor is showing the correct values.
Causes for it to go out of range are broken wires, disconnected connector or a bad sensor.
Check the voltage to the White/Black wire on the connector. It should show 5V, does it?
mode , do you mean the truck went into limited power mode? Ours would still run but had no power. We got the same lame responses and GM engineers could not figure it out. We left our truck in Nebraska and got it back 4 weeks later without any answers but it works now. They ended up changing out the exhaust filter (its in the first cat on the exhaust) and we have not had an issue since but we have nit pulled our fifth wheel again yet. An interesting note is that the info center never said the filter was dirty.
kcram - Pickups Host
1. I have a new 2500HD duramax diesel. I checked my oil at 3,000 and noticed it was very black. I changed it even though the computer said it wasn't needed. After only 500 more miles the oil is black again(not as black as the original). Is this normal for a diesel? It is my first one so I wasn't sure.
2. I live in Northern Maine. When should I install the cold weather radiator cover that came with the vehicle? I am already noticing a drop in fuel mileage that I think is due to cold weather. Will the cover improve this?
You can use your winterfront when the temperature is consistently below 32°F, but definitely when below the teens. Make sure you don't block the intercooler, though.
kcram - Pickups Host
I just read in another site post that on a 2007 Silverado with less than 4000 mi GM decided A New Turbo installation was required and to do that they have to pull the cab completely off the unit.
I have an 08 2500HD LTZ 4X4 CC on order with TPW of Dec 10.
The cold temperature takes longer for the fuel pump to get fuel to the injection pump.
There is a bulletin on this so the Service Department is just stroking you.
A leaking check valve in the injector pump body lets fuel drain back to the tank.
Cold weather makes priming the injection pump harder and takes longer.
Priming works. Replacing the cast part on the injection pump - out of warranty - $700
First set of injectors replaced at 36,000 miles - one stuck open and others leaking into the pan.
Second set of injectors replaced at 78,000 miles - same complaint.
Third set of injectors replaced at 113,000 miles - black smoke and lousy mileage.
Normal mileage about 17.5 to 20 and 12 to 14 with a 8,000 lb hay trailer and 800 pounds in the bed.
What do I do. One time yes and another time no!!
I do get some smoke at ideal some times and engine running not so smooth
we both have the 5.3 im sure the diesel should be the same
The shop says they can't find the problem.
The more I look for other people with this problem on the net the more I'm starting to believe this is a fairly common problem. And a problem that gm should be taking care of at there cost.
I'd like to stay in touch with you. My email is [email protected]
Let me know how things are going
1- where is the fuel filter located and how do i go about changing it? OEM replacement or after market?
2- Is there a factory installed block heater on this model? where do i look for it?
Any help appreciated. Thanks
Can anybody help?
When in "limpmode" (when this problem is occuring) is it safe to drive the truck? It will only go about 20km/h
If the shop will perform the work on the bulletin, should it be covered under warranty?
Thank for any help.
Do you know if its safe to drive in the "limpmode"