Ok so im experiencing a slight starting issue.... And was wondering if anyone could shed any light on it for me.....

When i try to start my 300Tdi (from hot or cold) the "check engine" light glows dimly on the dash when cranking, the engine starts and runs at idle all the time the key is in the crank position, but if i release the key the engine stops...... however if i give it about 1/3 throttle it starts and runs fine..... Not having any other running problems, once started it runs and drives fine.....

Any Ideas Guys????

J5