LS Swap - Erratic Dakota Digital Temps - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1bad396ss · 05-26-2018, 11:20 PM

Dakota sending unit in passenger head. Everything seemed to work fine during startup and burping the system then it pegged hot instantly. Thought I had a grounding issue, but suddenly started working. Now erratically working and not. Wiring of this gauge and various other BIM units seems sound. Is it possible for a air pocket to cause the issue? I ruled any sort of hear soak issues from header and downpipe our when it started to work during hot operating conditions. When working temp seems dead on with expected temp. Any thoughts or pointers appreciated.

Russ.W. · 05-27-2018, 01:49 AM

Have you dropped Dakota Digital an email?

I had an issue with a custom unit, and their customer service was top notch.

Also, which sender did you use? They offer one with a pigtail they specifically recommend for use with some of their systems and the BIM unit.

**1957 Chief** · 05-27-2018, 08:21 PM

Id check for an air pocket. Mine did the same upon startup/initial driving.

Bubba

**Hart_Rod** · 05-29-2018, 01:09 PM

Quote:

Originally Posted by 1bad396ss

Dakota sending unit in passenger head. Everything seemed to work fine during startup and burping the system then it pegged hot instantly. Thought I had a grounding issue, but suddenly started working. Now erratically working and not. Wiring of this gauge and various other BIM units seems sound. Is it possible for a air pocket to cause the issue? I ruled any sort of hear soak issues from header and downpipe our when it started to work during hot operating conditions. When working temp seems dead on with expected temp. Any thoughts or pointers appreciated.

Have you checked it with a scanner to see if you are getting a correct signal from the DD sending unit?

1bad396ss · 11-08-2018, 08:51 PM

Temps verified during tuning recently, rigged up a recirc tank, purged and purged the system with the truck darn near on the tailgate - thought I had it licksd but no dice. Grounds should be more than fine - single ought welding cable for both engine and trans. I think it is still a bit of air. Upper and lower hoses are basically solid - not rubber that I can squeeze to help burp it. Think I’ll install the steam line kit for the rear of the heads as well and try to come up with some sort of expansion tank placed highest in the system. Crazy how the simple things aren’t so simple sometimes...

87chevy.com · 11-08-2018, 09:24 PM

Have you compared what the ecu temp via obd2 and digital Dakota is showing? Do you have the heater core lines on the water pump connected to anything?

1bad396ss · 11-08-2018, 09:41 PM

Yes - the temp on both the ECM and DD are in line when the DD isn’t spiking. I have a loop on the heater lines now until the VA setup is finished. Not blocked but a loop hose.

**mongocanfly** · 11-08-2018, 09:44 PM

are you filling the engine thru the top radiator hose? and do you have the heater hoses where they can circulate?

05-26-2018, 11:20 PM	#1
1bad396ss Registered User Join Date: Jul 2012 Location: STL MO Posts: 85	LS Swap - Erratic Dakota Digital Temps Dakota sending unit in passenger head. Everything seemed to work fine during startup and burping the system then it pegged hot instantly. Thought I had a grounding issue, but suddenly started working. Now erratically working and not. Wiring of this gauge and various other BIM units seems sound. Is it possible for a air pocket to cause the issue? I ruled any sort of hear soak issues from header and downpipe our when it started to work during hot operating conditions. When working temp seems dead on with expected temp. Any thoughts or pointers appreciated.

05-27-2018, 01:49 AM	#2
Russ.W. Registered User Join Date: Aug 2009 Location: Australia Posts: 275	Re: LS Swap - Erratic Dakota Digital Temps Have you dropped Dakota Digital an email? I had an issue with a custom unit, and their customer service was top notch. Also, which sender did you use? They offer one with a pigtail they specifically recommend for use with some of their systems and the BIM unit. __________________ *Show Me How To Live* *"Wrongside"* My factory right-hand drive '67 C10 build Last edited by Russ.W.; 05-27-2018 at 01:59 AM.

05-27-2018, 08:21 PM	#3
1957 Chief Senior Member Join Date: Jun 2016 Location: Beebe, AR Posts: 462	Re: LS Swap - Erratic Dakota Digital Temps Id check for an air pocket. Mine did the same upon startup/initial driving. Bubba

11-08-2018, 08:51 PM	#5
1bad396ss Registered User Join Date: Jul 2012 Location: STL MO Posts: 85	Re: LS Swap - Erratic Dakota Digital Temps Temps verified during tuning recently, rigged up a recirc tank, purged and purged the system with the truck darn near on the tailgate - thought I had it licksd but no dice. Grounds should be more than fine - single ought welding cable for both engine and trans. I think it is still a bit of air. Upper and lower hoses are basically solid - not rubber that I can squeeze to help burp it. Think I’ll install the steam line kit for the rear of the heads as well and try to come up with some sort of expansion tank placed highest in the system. Crazy how the simple things aren’t so simple sometimes...

11-08-2018, 09:24 PM	#6
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	Re: LS Swap - Erratic Dakota Digital Temps Have you compared what the ecu temp via obd2 and digital Dakota is showing? Do you have the heater core lines on the water pump connected to anything? __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

11-08-2018, 09:41 PM	#7
1bad396ss Registered User Join Date: Jul 2012 Location: STL MO Posts: 85	Re: LS Swap - Erratic Dakota Digital Temps Yes - the temp on both the ECM and DD are in line when the DD isn’t spiking. I have a loop on the heater lines now until the VA setup is finished. Not blocked but a loop hose.

11-08-2018, 09:44 PM	#8
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: LS Swap - Erratic Dakota Digital Temps are you filling the engine thru the top radiator hose? and do you have the heater hoses where they can circulate? __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver



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