DEF contamination in gasoline
This vehicle has had enough DEF poured in the fuel tank to cause multiple cylinder misfires and now down to one cylinder misfire. I have yet to take a look at the vehicle. This is a new one for me. I feel a best practice may be recommending Injectors, pump, rail, flush line and steam clean the tank. Seems like it could have a good possibility of a come back if any piece work is attempted.
Hello Bill. I recently took a diesel class on Fords. It was mentioned many times in the class that if this happens it is recommended to replace the entire system. Also it sounds like that is what they usually always do at the dealer. I was talking to a customer of mine and his did this to his truck when it was like new and that is what the dealer did was replaced everything. I think you are correct if everything is not replaced you would be leaving your self open to a possible comeback. I have also not personally dealt with this just going off what I was told in training and what I have heard.
Thank you for the input Chris.
I appreciate it.
I wonder if the full coverage vehicle insurance might cover this.... Especially if it was done maliciously. This might be worth asking for the customer to help save some money.
That was brought up in the diesel class and some insurance companies were covering this as it could be about 10-15k in damages in the diesels.
Obviously I had the same one with kris lewis. Good classes.
Considering that this is a basic design, port-injection system, I would recommend the following: remove and clean the tank, replace the fuel pump, replace the fuel filter, remove and ultrasonically clean the fuel injectors, run water then blow air through the fuel lines.
Effect of fuel injection are of minor consequence in this vehicle; comparing this to the scenario of DEF in a diesel system is about ridiculous.
Since this is a gas engine, I would drain and clean the tank, replace the pump and filter, then to be honest, I fire that sucker up. See what happens... If it runs fine and trims are correct, I'd ship it. Of course leave the door open for injector replacement in the future.
Diesel on the other hand, replace everything.
A 6.0L gm engine is gasoline. 6.6L gonna be diesel...
Is not the LC8 a LPG/CNG engine?
… point, yes it is! How can someone add DEF to THAT? I suspect that he loaded incorrect vehicle info.
LC8 ENGINE LPG/CNG, 8 CYL, V8, 6.0L, SFI, GEN 1, GMNA
Wrong info, I will correct that if I can. I saw 6.0 and went with it. I have not seen the vehicle yet and maybe not ever. It is 60 miles away from me.
I did not pay attention to the rpo code. If it is, then my mistake. I don't see any cng vehicles. That didn't even cross my mind.
The LC8 is CNG. This truck is not CNG My apologies. I have not seen the truck. I saw 6.0 and went with it. Incorrectly entered info. All I know is that it is a gas 6.0. I can get the full vin and correct that.
In theory, in such cases dipping the parts in hot water to dilute the crystals formed and remaining DEF would do.
In practice, you can't or at least shouldn't dip injectors and similar parts into water. Hot or cold makes no difference. But the rest parts should be, OK.
Still a full system replacement would be the best option, every single pipe, filter, senor or what so ever having contact with the contaminated fuel should be replaced.
Not only to avoid a comeback, but mainly to save time. Replacing the whole system will take less time than just trying to replace only what is needed by cleaning the rest in hot water.
One thing i would also suggest checking though, would be have a look inside the cylinders with an endoscope or similar, and also have a look to what you can on the exhaust system. What you are looking for is white/semi-blue crystal like formations. Similar to salt lets say.
For example, If you have lambda sensors with crystal formation on them.........Replace those as well!