Cheapest, easiest way to program LT1 PCM?
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
Cheapest, easiest way to program LT1 PCM?
The Mrs. wants the fan temps lowered in her 94. Does not want to change anything else. No performance tuning whatsoever.
Just the fan temps.
Is there a simple way to accomplish this without going all in on a performance tuning package?
Just the fan temps.
Is there a simple way to accomplish this without going all in on a performance tuning package?
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
I can do it for you, but I'm in Maryland. You can order a program called Tunercat, where you can change many settings in the PCM. I know you just want fan temps, but once you see everything in there, you may get carried away. If you wanted, and its not a daily driver, you could remove your PCM (pretty easy), ship it to me, I can hook it up in one of my 2 94's and make the adjustments, and I can send it back to you. But I'm sure someone closer will chime in.
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
These folks do a limited change but it still costs
http://www.lt1pcmtuning.com/
This would be the least expensive
http://www.lt1pcmtuning.com/
I can do it for you, but I'm in Maryland. You can order a program called Tunercat, where you can change many settings in the PCM. I know you just want fan temps, but once you see everything in there, you may get carried away. If you wanted, and its not a daily driver, you could remove your PCM (pretty easy), ship it to me, I can hook it up in one of my 2 94's and make the adjustments, and I can send it back to you. But I'm sure someone closer will chime in.
Last edited by drcook; Apr 25, 2019 at 06:16 PM.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Its a reflash so it will cost the same whether 1 change or a bunch. Lower temperature will lead to hearing cooling fan on all the time in town. A 160 thermostat would be a better place to start.
Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
I can do it for you, but I'm in Maryland. You can order a program called Tunercat, where you can change many settings in the PCM. I know you just want fan temps, but once you see everything in there, you may get carried away. If you wanted, and its not a daily driver, you could remove your PCM (pretty easy), ship it to me, I can hook it up in one of my 2 94's and make the adjustments, and I can send it back to you. But I'm sure someone closer will chime in.
Dunno what route we'll go, but I thank you for offering to help!
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
As stated, a 160 degree thermostat will help, but the fans should be programmed to come on sooner with it. I have 160 stats in both of mine, and I have lowered the fan temps a bit. I know the first one comes on at about 224 degrees at the factory setting, for emissions purposes, but I like to run a bit cooler. As far as hearing the fans on around town, my one car is a supercharged 383, with ARH headers and 3 inch exhaust. I couldn't hear if there was a heavy metal concert under my hood, let alone hear the fans 
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
You can also do it yourself.
Look at the hardware from Moates.net ($80) which allows you to connect to your car. Then there are several free or relatively low cost software like TunerPro RT, Tunercat, or others.
Once you get these you can make the changes yourself to many parameters in the computer. Plus you can do it again and again as you want to whenever you try something new.
Good luck.
Look at the hardware from Moates.net ($80) which allows you to connect to your car. Then there are several free or relatively low cost software like TunerPro RT, Tunercat, or others.
Once you get these you can make the changes yourself to many parameters in the computer. Plus you can do it again and again as you want to whenever you try something new.
Good luck.
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Thread Starter
Melting Slicks
Joined: Nov 2013
Posts: 3,451
Likes: 336
From: Greater Cincinnati Area.
You can also do it yourself.
Look at the hardware from Moates.net ($80) which allows you to connect to your car. Then there are several free or relatively low cost software like TunerPro RT, Tunercat, or others.
Once you get these you can make the changes yourself to many parameters in the computer. Plus you can do it again and again as you want to whenever you try something new.
Good luck.
Look at the hardware from Moates.net ($80) which allows you to connect to your car. Then there are several free or relatively low cost software like TunerPro RT, Tunercat, or others.
Once you get these you can make the changes yourself to many parameters in the computer. Plus you can do it again and again as you want to whenever you try something new.
Good luck.
She knows I modded mine and doesn't feel nervous driving it in traffic. Being an LT1, her car gets really hot, really fast, at a crawl.
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
She knows I modded mine and doesn't feel nervous driving it in traffic. Being an LT1, her car gets really hot, really fast, at a crawl.
I will be changing mine also, with a thermostat and to just kick the fans on at 210 / 215 instead of 219 / 228, which is where it is set from the factory (at least my 96 is). I of course, have to use the Jet interface, but if you get the software, you should see a table such as this: (I found if you click on the pic it will expand it enough to see better).
Take note the temps are in Celsius
Last edited by drcook; Apr 26, 2019 at 10:53 AM.
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
That's probably what we'll end up doing. She called them yesterday and they're out of stock till the end of the month on the cable she needs.
She knows I modded mine and doesn't feel nervous driving it in traffic. Being an LT1, her car gets really hot, really fast, at a crawl.
She knows I modded mine and doesn't feel nervous driving it in traffic. Being an LT1, her car gets really hot, really fast, at a crawl.
Talk to them and make sure you get the right one for your car.
Good luck.