Idle RPM
June 22nd, 2018, 1:38 PM
#1
CF Beginner
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Idle RPM
Just curious what my idle RPM should be? Mine has been around the 500-600 when I'm sitting at red lights. Often feel the engine rumble is this normal for my 2007 Tahoe?
June 24th, 2018, 9:38 AM
#2
CF Monarch
My experience with low idle on a 5.3 is fuel pressure regulator. This things sets on the fuel rail, or close to it with a vacuum hose. It's a diaphram, pull the hose, if you have fuel in it probably the diaphram has a hole causing the low idle.
