Low fire gas pressure lp?
If you are talking about a gas grill, there is a common issue where it is a problem of iming. You need to have all the gas valves off on the grill before you open the main gas valve to the LP tank. If you have a gas valve open on the grill when you open the LP tank, it can cause it to low-flow. Shut the LP, turn all the grill valves off and then start at the tank first. This is a common problem which is easily fixed.
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