LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Need help now! Lt1 running hot at idle!

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Old 04-05-2013, 12:59 PM
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Default Need help now! Lt1 running hot at idle!

Hey guys I'm a newbie on this so any help will be highly appreciated . I recently bought a 1994 camaro z28 a4 , when I got the car it looked as if someone took a **** in the radiator so I flushed it best I could with a hose d's that five times and the car got better when the car is driven stays cool even tho I never drive it more ten ten mins due to it not being registered yet . When I run the car in my driveway it will warm up normally then will creep up to 235 and THEN the fans come on and will lower the temp a few degrees and will fluctuate like that untill driven or shut off also the car has a 160 stat help please lol :/
Old 04-05-2013, 01:06 PM
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sounds like something is plugged
Old 04-05-2013, 01:11 PM
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Last time ive seen that someone filled their vehicle with straight water and it rusted the block and heads "4.0" wrangler and plugged heater core and pump.
Old 04-05-2013, 02:41 PM
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It doesn't matter what temperature the thermostat is, fans are set to come on around 225. All that 160* thermostat will do for you on a stock fan tune over a 185* thermostat is that it'll take you a little longer to get from 160 to 235. Absolutely normal.
Old 04-05-2013, 03:26 PM
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I gave an answer on the old thread you dug up and posted to...


https://ls1tech.com/forums/17291433-post19.html
Old 04-06-2013, 07:17 PM
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Thanks guts means alot . Does any I e know how to do the fan switch I keep hearing about?
Old 04-07-2013, 12:23 AM
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How do I do the wiring and so forth not real good with wiring so any input would be gret thanks .
Old 04-07-2013, 01:06 AM
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I believe it's on shoebox's site. I did it and it cost like $5 for the switch and like $3 for some wire. Essentially all your doing is tapping into the ground from the ECM to the fan relay and applying said ground when you flip the switch to turn on the fans. It took me about 20 mins to do. If it isn't on his site just google it. It's out there somewhere.
Old 04-07-2013, 01:37 AM
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You have any pics on how you did it?... And what kind of differences dd you see with the switch and when do you use it generally?
Old 04-07-2013, 01:51 AM
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Prior to that 235 degrees when both fans kick on... is there any time one fan is running?
Old 04-07-2013, 03:07 AM
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I'm not entirely sure both kick on at 235 . I just hear then come on . But before that no there isn't buy ik the stock setting for either fan to come on are real high like 230 or somethin
Old 04-07-2013, 11:07 AM
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After I installed the switch before i changed the turn on temp in the tune I would flip the switch on at about 210 degrees and the temp would go back down and hang out just above 170. The weather here is crap today but I will try and PM you a picture of the install. For me it was just one wire as I only ran the switch for the low speed fan. There is a company out there that sells a pre manufactured setup that has switches for both fans.
Old 04-07-2013, 11:11 AM
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Need help now! Lt1 running hot at idle!-fan_switch_wires.jpg

Here is the picture off of the shoebox site. From there you run the wire through the firewall to your switch and then to ground. I've seen some that actually put LEDs in the line so they knew the switch was on. I didn't bother with that. I used a little rocker switch and mounted it on the left side of my console right next to where my knee usually is when I drive.
Old 04-07-2013, 12:22 PM
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Originally Posted by rich5368
Attachment 397987

Here is the picture off of the shoebox site. From there you run the wire through the firewall to your switch and then to ground. I've seen some that actually put LEDs in the line so they knew the switch was on. I didn't bother with that. I used a little rocker switch and mounted it on the left side of my console right next to where my knee usually is when I drive.
Sweet I like it . Also what kind if temps did you expierience before the switch and after?
Old 04-07-2013, 01:05 PM
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It's been quite awhile since I owned my '94 Z28, but I remember it running hot all the time. Even with the 160* stat. Do the fan switch and you'll be fine. Honestly, I just wired mine to where the fans came on as soon as the key turned to 'ON' and it really made a difference as far as how hot it got.
Old 04-07-2013, 01:19 PM
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Originally Posted by rich5368
After I installed the switch before i changed the turn on temp in the tune I would flip the switch on at about 210 degrees and the temp would go back down and hang out just above 170. The weather here is crap today but I will try and PM you a picture of the install. For me it was just one wire as I only ran the switch for the low speed fan. There is a company out there that sells a pre manufactured setup that has switches for both fans.
Thanks that would be really cool lol . I'm just working out all kinks before I put it on the road and this was one of my concerns .
Old 04-07-2013, 01:20 PM
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I don't want them on all the time really just cause I don't wanna stress the battery and alternator . So that's where I got the switch idea?
Old 04-07-2013, 06:10 PM
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Before the switch i was running 220+. After with me turning the fan on manually ~210 is the highest my car has seen.
Old 04-07-2013, 09:40 PM
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Originally Posted by Z28akagluemaker
I don't want them on all the time really just cause I don't wanna stress the battery and alternator . So that's where I got the switch idea?
Good man. There is no need to run them all the time.
Old 04-07-2013, 09:47 PM
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Originally Posted by shbox
Good man. There is no need to run them all the time.
Thanks man . You do the fan switch too? How did you do it


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