My 1997 tahoe 5.7 160000 miles, runs rough at idle (most days) and the rpms dip about every 2 - 3 seconds when at idle. any ideas on what it could be? its only when it is warmed up. fuel pump has not been replaced nor the fuel filter. however it can do just a quick dip that can rock the truck or do it continuously (however this rarely happens) also the spark plugs are fairly new, as is the distributor and plug wires.
5.7 1997 tahoe running rough
- Thread starter amorr24
- Start date
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SunlitComet
OBS Jedi-Do Good
do some basic testing, run pressure testing of the sytem as long as you need to determine if that is the reason for it or if it something like another sensor giving false data to the pcm. Test for vacuum leaks, disconnected hoses or lood or broken wiring/ connectors.
