My truck miss fires and stalls after warm up . The rpms go up on it’s own trying to stay alive but stalls the temp. gauge goes up and down after warm. I’ve changed the thermostat cleaned MAF and throttle body still having the issue. Also when I throw into gear it stalls immediately.
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First, if there is a check engine light on by all means post them below int he comments. Just about any local parts store will pull the codes for free.
Most likely cause is a vacuum leak. Check around the intake area first.
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