Results 1 to 9 of 9

Thread: gen 3 truck electric fan

  1. #1
    Potential Tuner
    Join Date
    Jan 2019
    Posts
    3

    gen 3 truck electric fan

    curtis_settles_write.hpt

    Having trouble getting a fan to run. it will run with the scanner commanding It but not with the CTS coming up to the set temp. I have tried every setting i could think of or find on google, thanks

  2. #2
    Senior Tuner
    Join Date
    Jun 2004
    Location
    405
    Posts
    2,288
    Can't look at your file. What year is the truck?

  3. #3
    Potential Tuner
    Join Date
    Jan 2019
    Posts
    3
    99 i believe. pin 42 works with scanner just not thru tune

  4. #4

  5. #5
    Potential Tuner
    Join Date
    Dec 2018
    Location
    Minnesota
    Posts
    3
    Well, I'm new to HP Tuners but you have it set to No Fans.
    The other thing that will help is give the fans a change to run for a little while. Set the on temp 5 or 10* higher than the off temp.

  6. #6
    Senior Tuner
    Join Date
    Jun 2004
    Location
    405
    Posts
    2,288
    You need to update the OS to a 02 to get proper E-fan operation. 99-00 OS won't operate them correctly. Some 01 OS will and some wont. So most just update to 02 to be sure. For other particulars you need to state whether you are using an OEM fan harness or an aftermarket one. And if aftermarket then you need to say if it is the type with 1 wire added to the pcm and 1 wire to the A/C compressor or 2 wires added to the PCM.

  7. #7
    Potential Tuner
    Join Date
    Sep 2010
    Location
    missouri
    Posts
    3
    if i did mine over again i'd use the 2002 tahoe os to run the fans and have the ability to use e85 if you ever want to burn corn. otherwise like stated above any 2002 os will do the trick.
    Last edited by randybill; 01-24-2019 at 03:55 PM. Reason: more better grammar

  8. #8
    Senior Tuner LSxpwrdZ's Avatar
    Join Date
    Dec 2008
    Location
    on the Dyno
    Posts
    1,825
    The older 99-00 OS's can be made to work also, they are the same OS's that were also used in Fbodies and C5's from the same years that both had 3pin AC pressure sensors and 2 cooling fans.
    James Short - [email protected]
    Located in Central Kentucky
    ShorTuning
    2020 Camaro 2SS | BTR 230 | GPI CNC Heads | MSD Intake | Rotofab | 2" LT's | Flex Fuel | 638rwhp / 540rwtq
    2002 Camaro | LSX 427 | CID LS7's | Twin GT5088's | Haltech Nexus R5 | RPM TH400

  9. #9
    Senior Tuner LSxpwrdZ's Avatar
    Join Date
    Dec 2008
    Location
    on the Dyno
    Posts
    1,825
    curtis_settles_write fan fix.hpt

    I normally update to a the 12212156 2002 OS on all the ones I do but give this file a try to see if it works.
    James Short - [email protected]
    Located in Central Kentucky
    ShorTuning
    2020 Camaro 2SS | BTR 230 | GPI CNC Heads | MSD Intake | Rotofab | 2" LT's | Flex Fuel | 638rwhp / 540rwtq
    2002 Camaro | LSX 427 | CID LS7's | Twin GT5088's | Haltech Nexus R5 | RPM TH400