PCM Receiver?
You always need to be a little worried about your electronics around a gas engine. It won't show up as much on a PCM receiver but that doesn't mean it's not occuring. Your best bet is to test with a PPM receiver to make sure nothing 'obvious' is going wrong and then use the PCM system after you've worked out any possible bugs. A constant low level interference might not show up on a PCM receiver untill it happens in flight, even if you range check.