The CFM of the efans tops out at around 5000CFM. Think of 2 square foot of radiator at 60 MPH, number of feet in a mile 5280 =10560 CFM at 60. (And unless you are towing a big trailer, fans are generally not needed at speed.) The airflow over the radiator exceeds the CFM of the electric fans quickly. Problem is at 30MPH+ electric fans are useless. If you want a lower temp range you will have to do something else like a hard wired temperature sensor etc. The E67 ECM is on the 2007+ TBSS and the fans work as far as I hear, but the setup is different than the E40 ECM. Yet, the E40 ECM runs efans on the GTO and Corvette. The E40 and E67 ECM on the TBSS did not have efans from the factory. You can also turn on the AC and see if the fans kick on - by the kit design.
Sometimes a computer will freek if the bottom of the scale is at the max. I would leave a 0 in 192 and start the settings at 196 and warm then engine up to 196- just to test it for working properly. The E40 2.5 bar custom OS would rescale the fan temps - if you had a 2006. Sounds like you want a lower temp then the factory ECM will handle. He also takes the time to answer all of your questions. I would get ahold of Alvin, he knows what he is doing and generally gets back to you to answer questions. Otherwise I am going to have to go old school and use a switcha nd relay to control this setup which I dont want to do as i would rather have the ecm control the fans. Here is the file I was sent and the one I have in right now. Anyone got any ideas?Īt the moment I am not worried about key off fan opertation, only key on and with or without a/c operation. I have a 160 thermostat in the truck and would like to stay in the 170 range or so, but so far I am stumped on this. I need to know what I have to do to get the fans to come on at the lowest setting (192 I know this much) and run at 100% for the entire time they are on. If they are left in PWM mode only one fan will come on and it will pulse badly. I have found the fans will only work if set to "Discrete" in the fan settings at least. That works as far as I can tell as I can trigger the fans tru the VCM scanner at least. I was instructed to use pin 49 on the J3 connector on my harness. He set the Efans in the ECM to "PWM electric" with 3 fans even though there is only 2 fans but they are wired to seem like 1 fan thru two relays that start 1 first, then 10 sec later the 2nd fan comes on.
#Trailblazer pcm pin schedule Patch#
The ECM patch I got from the vendor is not working as it seems the 2008 TBSS uses the E67 ECM that did not have Efans on it from the factory. Please note, 08+ Automatics will have a transmission control module also, if sending in your PCM please include this.Īlso, check out our Aeroforce Scan Gauge – not only is this a helpful gauge for scanning many parameters, but it is capable of performing the CASE Relearn as well (if you are doing a core program).Ok here is my deal, I got a wiring harness and a set of LS1 fans (dual setup) What program should I use and what is refundable? Click here! Express shipping only covers one shipment for loaner programs, the second will be returned via UPS Ground unless other arrangements are made. After placing your order, please click on fill out an order sheet for your vehicle ( here). We can account for most modifications you might have (2002-2005 year models: we are not able to make speedometer corrections or remove park/neutral rev limiter). Our tuning also helps with towing if you choose to do so. Our performance tuning for the 4.2L I6 typically yields 10-14hp and 1-3mpg, as well as better throttle response, driveability, and more pep off the line. Performance Parts Installation & Tuning.Trailblazer SS & 5.3L Mail Order Tuning.
#Trailblazer pcm pin schedule full size#
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