Runs rough and stalls

Tiny
LOUBOC1
  • MEMBER
  • 2009 BUICK ENCLAVE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
DTC codes refer to EGR, PCV intake leaks. Cannot find EGR valve or typical PCV valves. Car now backfires with black exhaust and stalls after a while. Do not see any obvious vacuum leaks on intake manifold tubing. All six spark plugs and ignition coils were replaced.
Saturday, July 21st, 2018 AT 9:20 AM

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