Should my fuel mileage be THIS bad??
#18
06-21-2012 | 08:51 PM
What blend of diesel/bio are you running in your truck? If you're running anything over B20 stop and change your fuel filters because Bio Diesel is one of the best solvents you ever want to see it will eat every rubber seal and break up all the crud in the fuel system sending it right from the fuel tank plugging up the filters. What's your boost pressure max out at when you get on the truck? When the cat plugged up on my truck I would only see 19-21 PSI of boost and that will absolutely kill your mileage because the truck can't breath.
#21
06-22-2012 | 07:42 AM
#22
06-22-2012 | 08:08 AM
It's not loud, it's all stock. When I turn the truck off you can hear the turbo spooling down and it has like a, bad bearing sound, like a semi grinding sound I guess. I'll see if I can make a video
#24
06-22-2012 | 01:25 PM
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From: Dover AFB DE / Harrisburg PA
#25
06-22-2012 | 01:55 PM
#26
06-22-2012 | 02:15 PM
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From: lost vegas
it would be pretty cheap if you did it. just pull the turbo and disassemble and clean the unison ring for the VGT system. it most likely is rusted up in one position and cant move to let your boost build correctly.
your making some boost so it isn't stuck open. the VGT actuator solenoid could be bad too. that would be more money to fix.
do you have a tuner that can monitor the engine and VGT duty cycle and stuff?
your making some boost so it isn't stuck open. the VGT actuator solenoid could be bad too. that would be more money to fix.
do you have a tuner that can monitor the engine and VGT duty cycle and stuff?
#27
06-22-2012 | 03:06 PM
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From: In a house, in a small town
That's still on the low side but won't be enough to cause the PCM to trigger the CEL. Mixedbreed is most likely correct and the vanes are just moving so far and stopping due to rust scale or gummed up with soot from to much idling or in town driving and not getting the EGT's hot enough to burn all that crap out. When I was driving my truck at least twice a week I would purposely push the EGT's up and past 1100* for very short burst just clean the turbo out. Plus it's fun just to stretch the old girls legs a little.
What are the EGT's when you are cruising at speed? They should be around 600*-700* just cruising and moderate acceleration you should probably see no more than 800*-900* with the EGT's hovering around 400*-450* just idling.
What are the EGT's when you are cruising at speed? They should be around 600*-700* just cruising and moderate acceleration you should probably see no more than 800*-900* with the EGT's hovering around 400*-450* just idling.
#29
06-22-2012 | 05:17 PM
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From: In a house, in a small town
I hope you haven't been running anything other than the stock tune in the truck with out have that pyro probe in?
#30
06-22-2012 | 05:40 PM
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From: lost vegas
That's still on the low side but won't be enough to cause the PCM to trigger the CEL. Mixedbreed is most likely correct and the vanes are just moving so far and stopping due to rust scale or gummed up with soot from to much idling or in town driving and not getting the EGT's hot enough to burn all that crap out. When I was driving my truck at least twice a week I would purposely push the EGT's up and past 1100* for very short burst just clean the turbo out. Plus it's fun just to stretch the old girls legs a little.
What are the EGT's when you are cruising at speed? They should be around 600*-700* just cruising and moderate acceleration you should probably see no more than 800*-900* with the EGT's hovering around 400*-450* just idling.
What are the EGT's when you are cruising at speed? They should be around 600*-700* just cruising and moderate acceleration you should probably see no more than 800*-900* with the EGT's hovering around 400*-450* just idling.
true the EGT's will skyrocket in a few seconds if not monitored. but sometimes that is good for the truck.
could be the EGR valve too now that i am thinking about it. stuck open and just letting it flood the intake with hot spent exhaust...
so many things it could be too
fuel filters clogged, air filter clogged, VGT system, EGR system, check the basics first, then worry about the rest. EGR valve is Basic compared to the turbo.