Question about Cadillac DeVille

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Why is my cadillac 4.5 engine smoking

I had code E-47-48-52-55. Repaired all codes and reset computer.No codes after two weeks.Replaced MAP sensor,PCV valve,Diverter valve,spark plugs and wire set. Now at start up I have no smoke coming from the exhaust until car reaches operating temp. Drove car 123 mile parked and had no smoke.Allowed car to cool down. Checked anti-freeze in the overflow tank and radiator and it was good. Started car and once car reached operating temp it started to lightly smoke.

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  • Cadillac Master
  • 11,037 Answers

What color smoke ? Blue = oil burning , black = too much fuel (rich) white = coolant - blown head gasket ,cracked head or block . White also could be caused fuel running through the engine , no combustion !
What Your Exhaust Smoke Is Trying To Tell You

Stuck Open Fuel Injector how to fix

Posted on Jun 14, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

fastboyz
  • 674 Answers

SOURCE: OIL IN AIR CLEANER PUDDLED UNTIL

get the car warmed up and let idle and pull the pvc hose out and watch how much smoke is comming out of the valve cover. then rev it up and see how much comes out. it sure soulnd like blow by to me.

Posted on Sep 11, 2008

samson-1
  • 153 Answers

SOURCE: 88 rx7 13b twin rotary

Sounds like you have a cracked block between the water jacket and the combustion chamber.Did you ave a warranty on the rebuild?

Posted on Sep 17, 2008

  • 31 Answers

SOURCE: My 95 Honda Civic dx (revving up and down)

sounds like you might of blown a head or intake manifold gasket or cracked head. If it sounds like a rollercoaster going up the tracks or tractor sound. it's that. It's expensive repair. My advice if you dont know anyone cheap get another used car until you fix it or whatever your situation is. Also, it idles up and down because of the air escaping from the crack. If engine doesnt hold constant pressurethats whate happens. everything is to the T when working with vehicles. Plus redline dont matter, theres a cut off point, however because of the high rev you could of caused the over rev and blew a gasket or cracked the heads. Especially if you didnt have the proper fluids to keep the temperature down. Good Luck. Been there.

Posted on Feb 16, 2009

  • 56 Answers

SOURCE: The engine suddenly started running rough

CHECK YOU'RE catilactic converter

Posted on Feb 03, 2010

  • 183 Answers

SOURCE: thick oil, blue smoke from exhaust

sound like you have blown head gaskets and water getting in the oil

Posted on Mar 09, 2010

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1 Answer

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