Duramax Diesels Forum Truck of the Week
  #1  
Old 01-17-2013, 11:23 PM
sab316 sab316 is offline
FNG
 
Join Date: Jan 2013
Location: MS
Posts: 6
Default Bad EGT Probe?

2006 LBZ. EFI Live tunes by Idaho Rob. Running a Edge Insight, probably 3/4 of the time my EGT probe will only read about 80-90 degrees. No matter if I'm stopped or running 70 down the interstate.

Sometimes it's working while driving, then all of the sudden drops down and sticks at 60-70*. When I open the door on occasion its already powered up, so I've discovered I have to let it try to start up, then shut down to make sure it works.

All other parameters are reading fine. I've tried unplugging it and letting it sit. EGT Probe isn't bent, cord isn't kinked anywhere.

Also I've noticed that when it is working, when I push the brakes in... my EGT's drop down to 80 or so and stick. When I let off brake they go back up (when its actually working). When it does stick on a temperature, when I park the truck and turn it off, with the key still in the ignition it will start reading the right temperature.

__________________
2006 / Chevrolet / LBZ / CCSB / 4x4
5% Tint / H2's / Nitto / Cognito UCA
Bilsteins / 5" exhaust / EFI Live
Reply With Quote
  #2  
Old 01-18-2013, 06:42 AM
duramax3500 duramax3500 is offline
FNG
 
Join Date: Jun 2012
Location: East Freetown ma
Posts: 28

Default

Im having the same problem turn the heat on and it does that. im going to call edge when i have my day off next week
Reply With Quote
  #3  
Old 01-18-2013, 07:01 AM
messejme's Avatar
messejme messejme is offline
Jazzy, Me and Max
 
Join Date: Mar 2008
Location: Branchburg NJ
Posts: 727

Default

could be a short. if a length of looped wire is attached where thermocouple should be it will read close to ambient air temperature.
__________________
04.5 LLY dooley CC. EFILive, SC IV, 1058, race valve, Airdog-150, 4" stack, Socal built engine, S480 over GT4094vvt stage 2, 60% overs, arson III CP3, flo pro extreme headers and up-pipes, PPE dual CP3's
Reply With Quote
  #4  
Old 01-18-2013, 08:34 AM
sab316 sab316 is offline
FNG
 
Join Date: Jan 2013
Location: MS
Posts: 6
Default

Just got off the phone with Edge. Told him what it was doing, no questions asked dropped another in the mail. Took all of 5 minutes.
__________________
2006 / Chevrolet / LBZ / CCSB / 4x4
5% Tint / H2's / Nitto / Cognito UCA
Bilsteins / 5" exhaust / EFI Live
Reply With Quote
  #5  
Old 01-18-2013, 08:49 AM
McRat's Avatar
McRat McRat is offline
Diesel Hotrodder


 
Join Date: Aug 2006
Location: Norco CA
Posts: 13,263

Default

NOTE:

Do not extend conventional thermocouple wires.

Thermocouples work because 2 different metals will generate voltage when heated, based on the metals and the temperature. If you use DIFFERENT metals than what came with it, it will not read correctly. The voltage they make is VERY weak, so they need an amplifier, which is normally built into the gauge itself, but can be external.

2nd - Thermocouples fail on a routine basis at high temps, but even at low temps, they will eventually fail.

Now, the LMM style thermistor is different. It is not a thermocouple.
__________________


2005 GMC 2500HD LLY "Casper"- LLY O/S 8758. 10.59 @ 129. EFILive "2CP3" Tuning, Mike L Suncoast Trans. PPE Dual CP3's, GT4202R.
2004.5 GMC 3500 SRW LLY "Big Blue" - LLY O/S 1668. 13.12@103. Powered by PPE/VA with Mike L Suncoast Trans.
2006 GMC 2500HD CC/SB LBZ "Wendy"- LBZ O/S 6128. 12.50 @ 107.x. EFILive tuning, Mike L trans.
Pat and Kat McSwain
"Casper" - Record Holder, Bonneville & El Mirage. Best Clocked Speed 197mph, Bonneville '09.
"World's Fastest Production Diesel Pickup - 174.586mph"
Reply With Quote
  #6  
Old 01-18-2013, 08:53 AM
sab316 sab316 is offline
FNG
 
Join Date: Jan 2013
Location: MS
Posts: 6
Default

Quote:
Originally Posted by McRat View Post
NOTE:

Do not extend conventional thermocouple wires.

Thermocouples work because 2 different metals will generate voltage when heated, based on the metals and the temperature. If you use DIFFERENT metals than what came with it, it will not read correctly. The voltage they make is VERY weak, so they need an amplifier, which is normally built into the gauge itself, but can be external.

2nd - Thermocouples fail on a routine basis at high temps, but even at low temps, they will eventually fail.

Now, the LMM style thermistor is different. It is not a thermocouple.
It hasn't worked right from the get-go though. So I'm guessing bad probe. Guess we'll see anyways, since they shipped out a new one.
__________________
2006 / Chevrolet / LBZ / CCSB / 4x4
5% Tint / H2's / Nitto / Cognito UCA
Bilsteins / 5" exhaust / EFI Live
Reply With Quote
  #7  
Old 01-18-2013, 08:59 AM
wrcknkrw's Avatar
wrcknkrw wrcknkrw is offline
Hotrodder
 
Join Date: Feb 2008
Location: roy ut
Posts: 447
Default

They have had some issues with the stand alone probes. Mine experienced the same type of issue. Changed it out with the daisy chain style one and has worked flawlessly since.
__________________
04 LLY sc lb 4x4 twins,trans,efi live,fass 150,edge insight,5" strait pipe
Reply With Quote
  #8  
Old 01-19-2013, 08:11 AM
sab316 sab316 is offline
FNG
 
Join Date: Jan 2013
Location: MS
Posts: 6
Default

Quote:
Originally Posted by duramax3500 View Post
Im having the same problem turn the heat on and it does that. im going to call edge when i have my day off next week
Okay, so I noticed this morning I have this same problem. It was cold so I had the air off till it warmed up all the way... EGT's were reading correctly. Turned air on and EGT's bottomed out. Did it several time... Same thing every time.
__________________
2006 / Chevrolet / LBZ / CCSB / 4x4
5% Tint / H2's / Nitto / Cognito UCA
Bilsteins / 5" exhaust / EFI Live
Reply With Quote
  #9  
Old 01-19-2013, 09:44 AM
Janimal444's Avatar
Janimal444 Janimal444 is offline
Hotrodder
 
Join Date: Jun 2012
Location: Salem, NH
Posts: 352

Default

I'm on my second edge probe for my Insight CTS. My other friend is on his 3rd. Failure of these seems to be a common issue from my experience.
__________________
Sold: 2007 LBZ 4x4 CCSB EFI Live, Kennedy Twin Lift Pumps, PPE Stage V Trans, 4" MBRP, Stock Engine, Twin turbos S475/stock, 40%nozzles.
Reply With Quote
  #10  
Old 01-19-2013, 01:16 PM
duramax3500 duramax3500 is offline
FNG
 
Join Date: Jun 2012
Location: East Freetown ma
Posts: 28

Default

Just sent them a email cause they are closed so hopefully monday they get back to me.
Reply With Quote
  #11  
Old 02-01-2013, 04:56 PM
SteveLBZ06's Avatar
SteveLBZ06 SteveLBZ06 is offline
Hotrodder
 
Join Date: Jan 2013
Location: Central MA
Posts: 200
Default

I just got mine installed and the cts only acknowledges that the cable (also the non expandable one) is hooked up once in a while. when it does reads it seems accurate, otherwise its frozen at a certain temp or a blank space where egte was. everything else on the insight works fine. called edge and a new cable is on its way, hopefully that squares it away
__________________
2006 Sierra 2500hd SLT EC/SB LBZ
Edge Insight CTS
MBRP 4 inch exhaust
MBRP downpipe
Tuned by Ridge Runner Diesel

Rancho RS9000XL
DHD center link brace, sleeves
Traded in for:

2015 Sierra 2500hd SLE CC/SB LML
All stock
Reply With Quote
  #12  
Old 04-20-2018, 10:27 AM
Rikter's Avatar
Rikter Rikter is offline
Grumpy, old, farty, funny
 
Join Date: Jan 2010
Location: Calgary
Posts: 61
Default

I have a very similar issue. It reads outside/underhood temp accurately then after an hour of highway driving it reads actual exhaust temp.
__________________
2005 GMC 2500HD EFI Live, 60+Injectors, ARP Studs, Heads Shined, Suncoast 6sp, PPE Manifolds w up/dwn Pipes, Sinister & MBRP Intercooler pipes, FASS 150gal Lift Pump, AFE intake, 4" Exhaust, HIDx4 Sled Deck, Bash Bar by Bandit, 40+69 gal Aux Fuel tanks, Chainsaw. EGR tossed, Bilstein Shocks
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 04:38 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
vB.Sponsors