Quote:
Originally Posted by LPTJoe
I think the ECU at present will be in a kind on 'learn' mode having been reset too, so hopefully over the next couple of tanks of fuel it will get used to the changes made and settle into behaving itself on a full time basis..
Also, my radiator fan seems to run from the get go and appears to be driven directly from the AUX belt... I'm not sure if they're designed to always be running whenever the engine is on so will have to do some digging to gain clarity on that too.
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Quote:
Originally Posted by TonyS9
The O2 sensor should reset any trim values after warm up cycle, I don't think it remembers anything too long term.
For the oil separator its worth putting a new oil seal (o-ring) in. The old one will be be hardened and not sealing well by now.
The viscous coupled fan will always 'run', but it doesn't push hard. In fact it rarely does except maybe after stilling at idle on a really hot day, then when you rev you can hear it sounds like a bus, but only for about 30s or so until the air flow cools it down.
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The ECU will re-learn the ideal trim for idle/low-medium load from the factory map over the next few days. Like Tony says, the trim values aren't set in stone and will constantly readjust, based on your driving style, fuel used and so on.
Good call on the oil separator seal Tony!
As for the viscous fan, there are two schools of thought on this and i tend to subscribe to a different one to Tony. They make the engine take longer to warm up, sap a lot of power and also sound like Concorde taking off at full chat.
In my own experience of removing them from 3 vehicles in recent years, not only does that improve warm up time, economy and performance but means you don't need ear defenders while driving!
In the states, several people have done dyno shoot-outs comparing different kinds of fans, all with similar results to this video :
https://youtu.be/ZXdLgaFXZzs
Watch it and you may well be shocked! Then you'll likely reach for ebay and an aftermarket electric cooling fan!
