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Showing results for tags '2016 sierra 6.2l'.
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2016 1500 6.2l. Having a intermittent rough idle stumble and even stumbles with increase to 1000k RPM. Its slight but noticeable. I have a cheap OBD2 bluetooth and Torque app for reading. I don't know how accurate it is, but figure all its doing is sending numbers, so should be find. With my truck idling fuel pressure is sporadic around 45psi with dips to 30 and even 22 psi, then sometimes up to 50psi. This seemed to be at about the same frequency as my stumble. The other reading if Fuel rail pressure which is much higher and cycles high and low but not as drastically. Is this normal? I tried attaching a screen shot. The numbers on the left are wrong but the graph shows the fluctuation. If someone knows the right reading to be expected or have a sensor to check their truck and see what the reading are, I would appreciate it.