Sudden Loss Of Engine Power?

[brent47]

To start with its a rb20det in my 32, sometimes after a bit of a hard run it'll do it, and other times just after it gets up to operating temp. if i try to accelrate it suddenly loses all power but no warning lights come on, and often stalls, then it'll run fine again and i can push as hard as i want....

I also have a light on at the moment now that looks like a cat conerter with heat coming of it, red light in the dash.....on idle it stays on and when reving it flashes....whats it trying to tell me???

[FATGTS-R]

If its the warning light I am thinking of it is the cat overheat warning. Check under your car to see if you still have a wire going into your cat. It is often not hooked up.

[Sumo]

If it is showing excessive heat, that usually tells you the car is running excessivly rich. This can be due to a faulty O2 sensor, or a faulty coolant temp sensor.

Cheers

Sumo

[The Dan]

The light will not come on if it is not hooked up. The light only comes on if it detects excessive heat which usually mean you have a rooted cat converter. Take your car to an exhaust shop and get them to remove it and inspect it. Most of the time you can just hit it from underneath and hear it rattle. If it rattles it's buggered. This can cause sudden loss of power including symptoms like the following:

Won't rev over a certain RPM

Uses excessive fuel

Engine cuts out

Exhaust smells like rotten eggs from the back

Can cause the turbo manifold to get red hot in some cases which can melt your impella (this is bad)

[The Dan]

Plus I am pretty sure that light can flash when it is in Diagnostic mode. It will register lean and rich mixtures by flashing.

Get your cat checked first.