Question about Cadillac DeVille

1 Answer

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.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Cadillac Master
  • 13,418 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

  • 2 Answers

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

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 674 Answers


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

  • 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

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How do you fix the PO105 Code on cadillac Deville 1996

Well the code is for a problem with the MAP sensor circuit. The sensor measures engine vac.
The sensor would need to be tested and replaced if faulty. It could also be a vac leak somewhere.

Apr 06, 2013 | Cadillac DeVille Cars & Trucks

2 Answers

Where is the map sensor located on a 2001 hyundai accent gs?

Your engine has likely worn out. You are describing the situation when the piston rings are so heavily worn that gas pressure forces itself into the engine sump, pressurizing the lower oil case, and forcing itself into the evaporation system, which then makes its way to the air filter housing.

I advise doing a compression check on the engine at your local garage and repairing or replacing the engine if necessary.

Nov 13, 2012 | 2001 Hyundai Accent

1 Answer

Hesitant when accelerating and already replaced MAP sensor

I use a hand held diag computer that can read 02 sensors,as long as the sensors are going up and down between lean and rich they are working.

Nov 12, 2012 | Cars & Trucks

2 Answers

How long does it take check engine light to go off after map sensor is replaced. Car is a 1998 buick leSabre. Code reader pointed to map sensor. I understand it takes several starts for light to reset so...

you can take of the ground of the battery of the car for 30 minutes and the computer will reset. if you drive around without reseting the computer might figure it out after 30 miles.

Feb 09, 2010 | 1998 Buick LeSabre

1 Answer

Engine dieing,replaced MAP sensor because of code 73,didn't fix.Cat has 77'000 miles. Feels like it is starving for fuel. It is an intermittent problem.

map code can be triggered for a bunch of reasons maybe its telling the truth about vaccum and you have none take oxygen sensor out of exhaust if engine runs better then cat could be pluged if not then you could be up the wrong tree also three wires 0n map sensor as follows one wire must have 5 or8 or 12 volts with the key on but not runnig other one should have continuity to the same colored wire on the tps the other should run back to yuour computer test continuity one that wire to computer

Jan 10, 2010 | 1992 Cadillac DeVille

3 Answers

1998 Chevy s10 4 cylinder running rough

One thing to check is the fuel pressure regulator.
If the diaphram is leaking it will cause gas to be pulled into the vacuum system causing lots of white smoke and extreme rough running.

Mar 03, 2009 | 1998 Chevrolet Cavalier

1 Answer



Feb 03, 2009 | 1985 Cadillac Seville

1 Answer

1994 Cadillac DeVille Concourse - Runs rough?

The "check engine" light will "light" when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. We recommend buying your own scanner and doing it yourself. With a pocket scanner you can check for fault codes to find out why the light came on in the first place. You can clear your cars trouble codes after you replace the malfunctioning sensors.

Jun 26, 2008 | 1994 Cadillac DeVille

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

34 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides