Re: 6.0/4l80 first start
 

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

Re: 6.0/4l80 first start
 

Yeah I didn't do that. :lol: We took it off one piece of a time. I'm sure I'd prefer your method.

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.

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.

http://i235.photobucket.com/albums/e...psq2kx7z5t.jpg

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?

Re: 6.0/4l80 first start
 

Thanks. I like it a lot.

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.

Re: 6.0/4l80 first start
 

Here is how I have the fans wired up.

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.

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.

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?

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.

Re: 6.0/4l80 first start
 

Why does it turn off at WOT?

Re: 6.0/4l80 first start
 

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.

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.

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.

Re: 6.0/4l80 first start
 

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?

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.

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.

Re: 6.0/4l80 first start
 

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

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*.

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)

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.

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.

Re: 6.0/4l80 first start
 

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