6.0/4l80 first start - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BR3W CITY · 01-08-2015, 07:17 PM

damn man, I never left the lights in too....I'm lazy, and thats a great idea.

slowcpe · 01-08-2015, 07:34 PM

Yeah I didn't do that.

We took it off one piece of a time. I'm sure I'd prefer your method.

elimontfort · 01-08-2015, 07:52 PM

Yeah I just couldn't pull it has one piece kinda hard when I'm working by myself. I really want to do another swap. It's kinda like getting addicted to boost. Once you felt it you only want to turbo everything afterwards.

Wasted Income · 01-09-2015, 09:21 AM

Its really not that bad, IF you have a helper to muscle it off with you. Nothing a six pack of milwaukees finest can't fix.

Pull the bumper, loosen the core support mounts, remove the radiator hoses, remove the wiring bulkhead at the firewall, remove any oil cooler or trans cooler lines, remove the cowl to get to the fender bolts, remove 8 fender bolts (2 on cowl, 2 on middle of A-pillar, 2 at bottom of A-pillar, 2 bolting inner fender to firewall), lift it off, and go to work. Makes life much easier.

elimontfort · 01-09-2015, 09:27 AM

Oh I know man. I wish I could have it just wasn't an option. I like your truck wasted! How do you like that intake?

Wasted Income · 01-09-2015, 09:46 AM

Thanks. I like it a lot.

elimontfort · 01-09-2015, 10:42 AM

So I have a problem ive been trying to trouble shoot and Im pretty sure it in the ecm. my problem is the fans kick on at 208 like normal but they will not shut off. temp drops to about 187 and they stay on. if I leave the truck running and I pull the relays for the fan they die when I put them back in they come back on. If I shut the truck off and start it back up they stay off till the temp gets up to 208 again then they wont shut off. Each fan is wired independently with a 30 amp relay and 40 amp fuse and gets its own signal from the ECM.

elimontfort · 01-09-2015, 10:57 AM

Here is how I have the fans wired up.

slotard · 01-09-2015, 11:06 AM

What's the off temperature supposed to be on your relay? If it expects to get down to 180 or something, and can't, it won't turn off.

Wasted Income · 01-09-2015, 11:09 AM

Yea, who did the tune? I'd check to see that the "off" temp in the tune didn't get fat fingered somehow.

elimontfort · 01-09-2015, 11:23 AM

I sent an email today asking them what the off temp is I have no clue what it was set at. I"d assume it would be around 190 ish?

Wasted Income · 01-09-2015, 12:15 PM

Yes, typically it would be in that range. They will have to look at your specific flash file to rule that out as a cause.

It should also shut off when you go WOT. I can't remember if it will do it or not with the key on and the engine off, but you can try pressing the pedal to the floor with the engine off and see if the fan cuts off. That might help rule out relay problems.

slotard · 01-09-2015, 12:53 PM

Why does it turn off at WOT?

Wasted Income · 01-09-2015, 02:47 PM

Quote:

Originally Posted by slotard

Why does it turn off at WOT?

Ugh, you'd think it was a monday, not a friday. Sorry, I was thinking AC compressor.

However, the fans may shut off at a certain vehicle speed.

ls1nova71 · 01-09-2015, 03:03 PM

The fans are supposed to turn off at about 40mph if I remember correctly. You could put the truck up on jack stands and run it and see if they go off. But my bet is also it's in the tune.

elimontfort · 01-20-2015, 10:16 PM

So the shop who did the tune said its set at 200. I'm gonna check and see if the ECM is actually disconnecting the ground for the fans tomorrow.

ls1nova71 · 01-21-2015, 11:45 AM

Quote:

Originally Posted by elimontfort

So the shop who did the tune said its set at 200. I'm gonna check and see if the ECM is actually disconnecting the ground for the fans tomorrow.

Is the 200, on or off temp? Since the PCM supplies ground, and the way you describe it working, you're going to find it's the PCM that's keeping them on, if your wire from the PCM was shorted to ground, it would make the fans stay on, but they would be on all the time, even with the key off. Did you try running it down the road to see if they go off at speed?

elimontfort · 01-21-2015, 01:09 PM

They are set to turn off at 200. I getting ready to take it down the road now to see if they shut off.

elimontfort · 01-21-2015, 01:10 PM

And I agree with you ls1 that it's the PCM keeping them on. But the tuner swears it's set at 200.

elimontfort · 01-21-2015, 01:35 PM

They are not going off at speed. Took it up to 70 still on.

ls1nova71 · 01-22-2015, 12:09 AM

Well I'm reasonably sure they are supposed to turn off at highway speeds. Do you have access to any kind of a scanner? Also, not sure if it will work or not, but if you unhook the temp sender it will make the PCM think it's -40*, and that should shut the fans off I would think, of course it will set a code and may force the fans on, not sure because I've never tried it, just thinking out loud. I'm still betting the off temp is set way too low, and isn't actually 200*.

BR3W CITY · 01-22-2015, 01:51 AM

ls1nova - Mine failed fans OFF when I overuled the IAT in the process of switching to Speed Density. (solving this with a MAPT)

ls1nova71 · 01-22-2015, 03:23 AM

I was referring to the coolant temperature sensor. I wouldn't think the intake air temp sensor would affect it, thats odd.

elimontfort · 01-22-2015, 08:44 AM

LS1 I have a scanner that's how I've been seeing my temps. It's shows live data and I can also freeze frame with it. When I get home I'll unplug the temp sensor. I'm also pulling my wiring out again and gonna triple check it.

elimontfort · 01-22-2015, 10:53 AM

Unplugged the temp sensor still stays on. Motor stumbled but other than that nothing else.

01-08-2015, 07:17 PM	#26
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 6.0/4l80 first start damn man, I never left the lights in too....I'm lazy, and thats a great idea. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-08-2015, 07:34 PM	#27
slowcpe Registered User Join Date: Sep 2013 Location: Evansville, IN Posts: 1,774	Re: 6.0/4l80 first start Yeah I didn't do that. We took it off one piece of a time. I'm sure I'd prefer your method. __________________ Ryan 1967 Red Stepside..."Laymond" http://67-72chevytrucks.com/vboard/s...40#post6441840 1972 Medium Olive SWB-Chester http://67-72chevytrucks.com/vboard/s...d.php?t=759628 1967/71 Blue SWB C10..SOLD 1977 SWB K10..my grandpa's.....never should have sold

01-08-2015, 07:52 PM	#28
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start Yeah I just couldn't pull it has one piece kinda hard when I'm working by myself. I really want to do another swap. It's kinda like getting addicted to boost. Once you felt it you only want to turbo everything afterwards.

01-09-2015, 09:21 AM	#29
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 6.0/4l80 first start Its really not that bad, IF you have a helper to muscle it off with you. Nothing a six pack of milwaukees finest can't fix. Pull the bumper, loosen the core support mounts, remove the radiator hoses, remove the wiring bulkhead at the firewall, remove any oil cooler or trans cooler lines, remove the cowl to get to the fender bolts, remove 8 fender bolts (2 on cowl, 2 on middle of A-pillar, 2 at bottom of A-pillar, 2 bolting inner fender to firewall), lift it off, and go to work. Makes life much easier. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

01-09-2015, 09:27 AM	#30
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start Oh I know man. I wish I could have it just wasn't an option. I like your truck wasted! How do you like that intake?

01-09-2015, 09:46 AM	#31
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 6.0/4l80 first start Thanks. I like it a lot. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

01-09-2015, 10:42 AM	#32
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start So I have a problem ive been trying to trouble shoot and Im pretty sure it in the ecm. my problem is the fans kick on at 208 like normal but they will not shut off. temp drops to about 187 and they stay on. if I leave the truck running and I pull the relays for the fan they die when I put them back in they come back on. If I shut the truck off and start it back up they stay off till the temp gets up to 208 again then they wont shut off. Each fan is wired independently with a 30 amp relay and 40 amp fuse and gets its own signal from the ECM.

01-09-2015, 10:57 AM	#33
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start Here is how I have the fans wired up. Attached Images

01-09-2015, 11:06 AM	#34
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: 6.0/4l80 first start What's the off temperature supposed to be on your relay? If it expects to get down to 180 or something, and can't, it won't turn off. __________________ 1973 C20, 350/350

01-09-2015, 11:09 AM	#35
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 6.0/4l80 first start Yea, who did the tune? I'd check to see that the "off" temp in the tune didn't get fat fingered somehow. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

01-09-2015, 11:23 AM	#36
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start I sent an email today asking them what the off temp is I have no clue what it was set at. I"d assume it would be around 190 ish?

01-09-2015, 12:15 PM	#37
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 6.0/4l80 first start Yes, typically it would be in that range. They will have to look at your specific flash file to rule that out as a cause. It should also shut off when you go WOT. I can't remember if it will do it or not with the key on and the engine off, but you can try pressing the pedal to the floor with the engine off and see if the fan cuts off. That might help rule out relay problems. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2016 Ford Explorer Sport - Twin Turbskis 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

01-09-2015, 12:53 PM	#38
slotard Registered User Join Date: Nov 2014 Location: Alameda, CA Posts: 877	Re: 6.0/4l80 first start Why does it turn off at WOT? __________________ 1973 C20, 350/350

01-09-2015, 03:03 PM	#40
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 6.0/4l80 first start The fans are supposed to turn off at about 40mph if I remember correctly. You could put the truck up on jack stands and run it and see if they go off. But my bet is also it's in the tune. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-20-2015, 10:16 PM	#41
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start So the shop who did the tune said its set at 200. I'm gonna check and see if the ECM is actually disconnecting the ground for the fans tomorrow.



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01-21-2015, 01:09 PM	#43
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start They are set to turn off at 200. I getting ready to take it down the road now to see if they shut off.

01-21-2015, 01:10 PM	#44
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start And I agree with you ls1 that it's the PCM keeping them on. But the tuner swears it's set at 200.

01-21-2015, 01:35 PM	#45
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start They are not going off at speed. Took it up to 70 still on.

01-22-2015, 12:09 AM	#46
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 6.0/4l80 first start Well I'm reasonably sure they are supposed to turn off at highway speeds. Do you have access to any kind of a scanner? Also, not sure if it will work or not, but if you unhook the temp sender it will make the PCM think it's -40, and that should shut the fans off I would think, of course it will set a code and may force the fans on, not sure because I've never tried it, just thinking out loud. I'm still betting the off temp is set way too low, and isn't actually 200. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-22-2015, 01:51 AM	#47
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 6.0/4l80 first start ls1nova - Mine failed fans OFF when I overuled the IAT in the process of switching to Speed Density. (solving this with a MAPT) __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-22-2015, 03:23 AM	#48
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 6.0/4l80 first start I was referring to the coolant temperature sensor. I wouldn't think the intake air temp sensor would affect it, thats odd. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-22-2015, 08:44 AM	#49
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start LS1 I have a scanner that's how I've been seeing my temps. It's shows live data and I can also freeze frame with it. When I get home I'll unplug the temp sensor. I'm also pulling my wiring out again and gonna triple check it.

01-22-2015, 10:53 AM	#50
elimontfort Registered User Join Date: Jun 2011 Location: Sunbury, N.C Posts: 140	Re: 6.0/4l80 first start Unplugged the temp sensor still stays on. Motor stumbled but other than that nothing else.

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