New to V8

[theross]

I've recently bought a V8 RRC on gas.  Took it out last weekend, got wet now its lost all power at the top end. 3000 rpm and above it justs farts, misfires and loses speed.  I've dried everything out, dizzy, leads, plugs, cylinders relays.  The only thing I haven't looked at is the chip thing on the side of the dizzy.  Can anyone help?

[tomarse]

does it do the same on petrol? or just on gas?

[theross]

It does it on both petrol and gas :(

[clbarclay]

The 'chip' on the side of the dizzy is the ignition amplifer module.

Is it running on EFI or carbs?

Take out a spark pulg or 2 and see what condition they are in. Black, grey, white, glazed, wet?

[theross]

Its a 3.9 EFI.  Spark plugs are brand new.  I did a full service after I picked it up.  It was running a little rich though which was sorted before I took her anywhere.

[Range Rover Blues]

Did you swap the dizzy cap and arm?

Have you still got the old ones?

<ine did the saem and it was a hong-kong-fuey cap.  After a couple of days yolu could see that 3 terminals were not getting scorched by the arcing, but it only showed up under load at high revs :?

Otherwise it could be the EFi ECU, especially if you have multipoint LPG as this will piggy-back onto the petrol system.

If it's single point or draw-through LPG then suspect the spark.

P.S> did you close you plugs up from 30 thou to 27 thou?