programming fan
Thread Starter
Cruising
Joined: Aug 2007
Posts: 11
Likes: 0
From: north carolina
programming fan
how do i reprogram my fan to come on sooner.
i am putting a 160 deg thermostat in this weekend, but from everything i have been reading on here i need to adjust the fan somehow.
heats up at stoplights.
i am putting a 160 deg thermostat in this weekend, but from everything i have been reading on here i need to adjust the fan somehow.
heats up at stoplights.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
What year corvette?
The fan(s) are controled by the ECM. You can either do it the cheap way and wire the fan(s) to ground with a toggle switch or have the ECM chip tuned to turn the fan on sooner. More info can be give if you let us know the year of the car.
I see this is your first post. Welcome aboard.
The fan(s) are controled by the ECM. You can either do it the cheap way and wire the fan(s) to ground with a toggle switch or have the ECM chip tuned to turn the fan on sooner. More info can be give if you let us know the year of the car.
I see this is your first post. Welcome aboard.
Racer
Joined: Dec 2004
Posts: 470
Likes: 0
From: Phoenix Arizona
If your car is overheating, altering fan on/off times, and placing a 160* thermostat is only masking the problem. First, what year is your car, and exactly what temperatures are you running when setting at a light?
We will need a little information from you so we can help. Also complete your profile for future posts.
Hope this helps..................
We will need a little information from you so we can help. Also complete your profile for future posts.
Hope this helps..................
Thread Starter
Cruising
Joined: Aug 2007
Posts: 11
Likes: 0
From: north carolina
not sure of the exact temperature, but definitely heats up when i stop.
the fan comes on just before the warning area in the gauge. i sound like a real newb, i know, but i can't remember the temp.
the fan comes on just before the warning area in the gauge. i sound like a real newb, i know, but i can't remember the temp.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Sounds like the fans are working correctly. The analog gauge gets almost in the hash marks before the fans come on. Drive it again and look at the digital coolant gauge and see what temp the fans on on at should be around 227*. If so, the fans are working normally.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
If it is an L98, a 160° stat is ill advised. A 160° is OK for an LTx engine. Either way maintenance should be your first step, including removing the radiator and cleaning out from in between the radiator and condenser. Next, you can try reprogramming or whatever is necessary for your year, to turn the fans on at a lower temp. Remember, the thermostat only controls the minimum operating temp. The stat opening point has NO influence over whether the temps rise at idle or not, nor how high.
RACE ON!!!
RACE ON!!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Unfortunately reprogramming a 93 is a little complicated and requires burning a new chip. This link shows an alternative that over rides the PCM to turn the fan on earlier.
http://www.ecklers.com/product.asp?p...6&dept_id=1252
The switch will set a code for Quad Driver Module 3 because the PCM sees the circuit grounded when not commanded to do so but that code will not illuminate the check engine light.
As others have suggested first make sure you do not have a restricted radiator or other cooling issues before modifying the fan circuit.
http://www.ecklers.com/product.asp?p...6&dept_id=1252
The switch will set a code for Quad Driver Module 3 because the PCM sees the circuit grounded when not commanded to do so but that code will not illuminate the check engine light.
As others have suggested first make sure you do not have a restricted radiator or other cooling issues before modifying the fan circuit.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
You will have to find a local tuner or use one of the members here that are tuners. You will have to ask them in advance about just reprogramming it for the fans, but a tune usually cost ~$200.
pcmforless.com is who I used last time.
pcmforless.com is who I used last time.
