Fuel Pressure

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Tahoehybrid18

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Dec 12, 2018
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So I have a question. How reliable are the fuel pressure readings from a OBD scan tool? I'm trying to track a issue, and during that tracking I noticed that at startup my fuel pressure is 59 psi, then after getting a block down the road, it drops to 47, and I've seen it as low as 43. Also recently I'm getting a slight rotten egg smell from the exhaust. Usually a longer drive and its gone, but its weird.
 

John Root

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Mar 1, 2019
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I have a Tahoe of latest model and whenever I punch the brakes or start to slow down to end, the oil pressure drops to zero, and the check oil pressure light comes on, and this continues until after I press on the gas and start going again.
 

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