what parts i need to
There are a few veriables that go into this including a clogged orifice or a clogged/restricted burner. My recomendation would be to have a tech look at this.
I believe That model range uses a Teddington gas valve/thermostat/safety. If you have a sustained pilot, then the safety curcuit is ok. You'll need a new thermostat valve. But I'm uncertain of that model number because of the 2. Look at the oven control valve to se if it looks like this;
Now if you have a later model IR2000-24, It will be different with a BASO valve underneath.
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