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When started cold and engines warming up the gas smoke and smell gas fumes

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  • Jeep Master
  • 20,706 Answers

Which engine, and year?
the engine is running way rich,
black smoke is very very rich .
its sick. get it serviced now.
lots of cause. do you want to do test or ask the blind for guessing.
????
The EFI engine can go rich for many reasons.
there are tests for each.

  1. check fuses
  2. scan the PCM first. got errors, they are REAL report them or read the FSM on what to do for each , its there. read it.
  3. fuel pressure way too high.
  4. ECT sensor wires fell off (scan it , and it tells you just that)
  5. leaking injectors (do a balance test)
  6. never tuned up this decade, so,, spark plugs ? replace them?
  7. Map sensor not working (vacuum to it missing, wires fell off)
  8. scan it driving , got more DTC errors. report them.
  9. FPR (fuel reg) bad. or vacuum to it missing. see #3

Posted on Apr 22, 2015

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