GEN IV E38 Holden Commodore Cooling Fans

[doubledip]

take it to Mark's 4x4 he should fix it if you bought the kit off him - its an easy fix

[CRFaig]

Thanks Doubledip.

Yes, has been back to Marks (or at least the ECU's have) It's on its fourth ECU. The first one didn't drive the fans at all. No ground and faulty. The second made the fans come on low speed straight after start-up. Mark reprogrammed another ECU with the percentages changed in the fan control parameters and we did the swap over. Put it in, no start and no tester communication. Swapped it over for another ECU and everything works but, as before, the fans come on immediately after start-up.
Mark has been really helpful with the ECU probs (came into his work on Saturday to swap over the dodgy ECU) and let me know that it looks like he's had a small run of faulty remanufactured E38's.

So....I've heard it's an easy fix. I've also been told that an EFILIVE reprogrammed E38 cannot run low and high speed as per the factory tune.

Is this true?

[doubledip]

I use the 'others' software when programming the ECU's and they can control the fans high and lo no problem. I have never used EFILive to program a E38 and control fans but are 99% (not 100 cause never done it ) that EFILive can drive both high and low fans independantly on temps

[CRFaig]

Thanks Double,

Yeah, Marks 4WD seem to think that the high and low cannot be controlled. Unfortunately, they're the ones that have to sort it out so I'm at the mercy of what they say.

[doubledip]

do you have a copy of the tune at all.. i guess not seeing you have to take it back to them ... just asking.. cause i could take a look and see if it is the problem i think it is

[CRFaig]

You're right, Mate.

Yes. They have the info, unfortunately. Thanks for the offer though. I may ask them for a copy of the tune when they take the car.

[doubledip]

how did you go... get it all sorted?

[CRFaig]

how did you go... get it all sorted?

Yes mate. The vehicle was sent to the Horse Power Factory and, after about 10 mins work, the fans came on at the desired temp. Dual-stage fan control does not appear to be used after changing the OS to EFILive though.