Fuel Temp Sensor - Chevy and GMC Duramax Diesel Forum

04.5-05 LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 26 (permalink) Old 12-29-2010, 06:35 PM Thread Starter
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Exclamation Fuel Temp Sensor

Look at 10,000 rail pressure post to see the problem I was having.

I threw a bad fuel temperature sensor code and it made my truck run like S H I T.

Has anyone had this problem and was the sensor actually bad or did you just reset it and role on?

Jordan
05 LLY CC SB 4X4, K&N ON LBZ INTAKE, RESONATOR PLUG, LBZ MP, 4" SILVERLINE, PCV RE-ROUTE, PORTED FUEL RAIL FITTING, EGR DELETE TUBE, FPRV SHIMMED, AIR DOG II 165, DEEP PAN/FILTER LOCK, TRANS-GO JR SHIFT KIT, SYN BLEND TRANS FLUID, PPE STANDARD, H2 WHEELS WRAPPED IN 295 GRAPS, HID H/L/F ALL ON, LED PLATE LIGHTS, MANUAL HIGH IDLE, GATORBACK SERP BELT, TORSION KEYS, TIE ROD SLEEVES, ARP HEAD STUDS

Oxcart- 01-18-2011, 11:43 PM
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post #2 of 26 (permalink) Old 12-29-2010, 07:39 PM Thread Starter
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At least I got to test my FPR and CP3. they both tested great...above spec!

Jordan
05 LLY CC SB 4X4, K&N ON LBZ INTAKE, RESONATOR PLUG, LBZ MP, 4" SILVERLINE, PCV RE-ROUTE, PORTED FUEL RAIL FITTING, EGR DELETE TUBE, FPRV SHIMMED, AIR DOG II 165, DEEP PAN/FILTER LOCK, TRANS-GO JR SHIFT KIT, SYN BLEND TRANS FLUID, PPE STANDARD, H2 WHEELS WRAPPED IN 295 GRAPS, HID H/L/F ALL ON, LED PLATE LIGHTS, MANUAL HIGH IDLE, GATORBACK SERP BELT, TORSION KEYS, TIE ROD SLEEVES, ARP HEAD STUDS

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post #3 of 26 (permalink) Old 12-30-2010, 08:10 AM Thread Starter
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Anyone?

Jordan
05 LLY CC SB 4X4, K&N ON LBZ INTAKE, RESONATOR PLUG, LBZ MP, 4" SILVERLINE, PCV RE-ROUTE, PORTED FUEL RAIL FITTING, EGR DELETE TUBE, FPRV SHIMMED, AIR DOG II 165, DEEP PAN/FILTER LOCK, TRANS-GO JR SHIFT KIT, SYN BLEND TRANS FLUID, PPE STANDARD, H2 WHEELS WRAPPED IN 295 GRAPS, HID H/L/F ALL ON, LED PLATE LIGHTS, MANUAL HIGH IDLE, GATORBACK SERP BELT, TORSION KEYS, TIE ROD SLEEVES, ARP HEAD STUDS

Oxcart- 01-18-2011, 11:43 PM
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post #4 of 26 (permalink) Old 12-30-2010, 08:12 AM
yep yep...
 
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how much fuel was in your truck when it did that? what was the outside temp and long long did you run the truck.

05' Chevy LT Black on Black LLY CC/SB Blackout Performance built motor/trans/tuned- Gone

"The Blessed Hellride"-08' GMC Sierra SLT Z71 CC/SB White

Big Dipper Reger proof trans, some sissy tunes, 35's and old school built front end
Done with it
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post #5 of 26 (permalink) Old 12-30-2010, 08:15 AM Thread Starter
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I had just filled it up from an 1/8 tank. I got a bad tank of fuel about 2 months ago, so that could have damaged the sensor...I don't know. I did fill it up all the way to the cap maybe it was kinda vacuum locked and tripped the sensor?

Jordan
05 LLY CC SB 4X4, K&N ON LBZ INTAKE, RESONATOR PLUG, LBZ MP, 4" SILVERLINE, PCV RE-ROUTE, PORTED FUEL RAIL FITTING, EGR DELETE TUBE, FPRV SHIMMED, AIR DOG II 165, DEEP PAN/FILTER LOCK, TRANS-GO JR SHIFT KIT, SYN BLEND TRANS FLUID, PPE STANDARD, H2 WHEELS WRAPPED IN 295 GRAPS, HID H/L/F ALL ON, LED PLATE LIGHTS, MANUAL HIGH IDLE, GATORBACK SERP BELT, TORSION KEYS, TIE ROD SLEEVES, ARP HEAD STUDS

Oxcart- 01-18-2011, 11:43 PM
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post #6 of 26 (permalink) Old 12-30-2010, 08:22 AM
yep yep...
 
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no ive ran alot of bad fuel, i was just wondering if your tank was too low what little bit of fuel you had was too hot and tripped the sensor. I try not to let mine get below a 1/4 tank, i'd just run it a bit and see how it does, might have just been your problem.

05' Chevy LT Black on Black LLY CC/SB Blackout Performance built motor/trans/tuned- Gone

"The Blessed Hellride"-08' GMC Sierra SLT Z71 CC/SB White

Big Dipper Reger proof trans, some sissy tunes, 35's and old school built front end
Done with it
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post #7 of 26 (permalink) Old 03-28-2011, 10:43 AM
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i threw the same code, are you still having the problem?

2007 chevy lmm LTZ
Z71 midnight blue
4" mbrp dsp5 egr block bf al terrains .
RIP - 05 LLY and Allison 5spd
[/B]
Quote:
Originally Posted by RedBowTies88;6Z28261
efilive is the easy way out...diehard smokers break out the butt connectors and get shit done
Z
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post #8 of 26 (permalink) Old 03-28-2011, 11:19 AM
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I've had that code to... my truck will also.skip when its cold... and just run like crap sometimes as well... subscribing to see what anybody has to.say?

03 CCSB EFI + 5" STRAIGHT PIPE + 33X12.50 18S ON EAGLE ALLOY 197'S + 250K MILES
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post #9 of 26 (permalink) Old 03-28-2011, 11:25 AM
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Quote:
Originally Posted by evansdmax View Post
I've had that code to... my truck will also.skip when its cold... and just run like crap sometimes as well... subscribing to see what anybody has to.say?
engine temp gauge fluxuates irradically? anything flash on the DIC? change in exhaust tone?

2007 chevy lmm LTZ
Z71 midnight blue
4" mbrp dsp5 egr block bf al terrains .
RIP - 05 LLY and Allison 5spd
[/B]
Quote:
Originally Posted by RedBowTies88;6Z28261
efilive is the easy way out...diehard smokers break out the butt connectors and get shit done
Z
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post #10 of 26 (permalink) Old 03-28-2011, 12:08 PM Thread Starter
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Quote:
Originally Posted by jcbDuramax View Post
i threw the same code, are you still having the problem?
I have not had a problem since I reset the code with the Tech II. It was what is called a brand specific code. Can only be read by the Tech II. That is why no tuners pick up a code like this. My buddy had some extra time with a TII one day and they went through his truck and cleared hundreds of hidden codes and footprints.

Personally, I think I either got a bad tank of fuel that set off the sensor, or I heated the fuel on a low tank and legitimately set off the sensor. I think I did get on it pretty hard on my way to get fuel and when I drove off, that is when I noticed it.:rockin

Jordan
05 LLY CC SB 4X4, K&N ON LBZ INTAKE, RESONATOR PLUG, LBZ MP, 4" SILVERLINE, PCV RE-ROUTE, PORTED FUEL RAIL FITTING, EGR DELETE TUBE, FPRV SHIMMED, AIR DOG II 165, DEEP PAN/FILTER LOCK, TRANS-GO JR SHIFT KIT, SYN BLEND TRANS FLUID, PPE STANDARD, H2 WHEELS WRAPPED IN 295 GRAPS, HID H/L/F ALL ON, LED PLATE LIGHTS, MANUAL HIGH IDLE, GATORBACK SERP BELT, TORSION KEYS, TIE ROD SLEEVES, ARP HEAD STUDS

Oxcart- 01-18-2011, 11:43 PM
Thread-efi smoke tune help

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