Advise tuning 7747 ECU on '92 Chevy Van

[Dunksterp]

Hey all,

So after the debacle's previously, I'm now back at square one (almost). I now have a 7747 ECU, which I'm controlling using an Ostrich 2.0.

Vehicle is a 92 Chevy G20 van, 5.7 700R4 trans, it's converted to LPG (dual fuel) but ignore that for now, just trying to get running on petrol properly, then will tweak for LPG.

Every seems to be working great. I'm able to upload a BIN to the Ostrich, start the van, it runs, and drives great, mostly....

I'm using the AMUR Bin I uploaded.

It idles crazy high, like 1500rpm, made parking fun!

My original ECU was the 299, with the AWLD prom, and from my research, it's basically the same as the AMUR Bin but on the newer 7747 ECU?

Can anyone why it would be idling so high? It previously (before installing new ECU) idled at around 650-700prm.

Am I able to put my 299 chip into the 7747 to test it?

Many thanks for any advice guys :)

Dunksterp