After my truck is fully warmed up and I come to stop it drops down below 500 and bounces around 490 and surges a bit and then goes to about 550 600 and is fine. Always happens once on every stop. Cleaned my Throttle Body Monday thinking it was clogged. No it. Hoping someone will have another idea.
Happened to me with my '04 Ram. Ended up being a malfunctioning EGR (exhaust gas recirculate) valve. It was stuck open and letting to much exhaust back into the intake, leaning me WAY out, to the point where I would almost stall. Look into it, man.
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