Question about 1990 Cadillac Deville
I have a 1990 Cadillac deville that starts and runs fine when warm and has always been a good starter in cold weather as well. But in the past few weeks it has been hard to start when cold, the outside temp here has been below 20 degrees.
I have to pump the foot feed or hold it to the floor to get the engine going, seems to be getting too much fuel because once it starts it blows a cloud of black smoke, but once running, it stays running and will restart the rest of the day just fine.
There is a much richer fuel mixture during a cold start, the colder the engine the richer the fuel mixture
retarded ignition timing causing the fuel to burn for a longer period of time makes the engine heat up faster
anything that doesn't allow the mixture to be properly metered, like vacuum leaks, bad temperature sensors, or O2 sensors, MAF or MAP sensors, bad EGR valves or PCV valves hoses or tubes,
anything that will cause the fuel mixture not to burn properly, like worn spark plugs, or any other ignition part, wires, cap, rotor, timing, compression, will cause poor start or no start conditions that are worse in lower temperatures,
also low voltage, week battery, slow cranking of the engine can also cause hard to start conditions
Posted on May 20, 2016
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
Tips for a great answer:
May 24, 2017 | 2000 Cadillac DeVille
Nov 18, 2011 | Cars & Trucks
May 17, 2011 | 2002 Cadillac Deville
Feb 10, 2011 | 2004 Jeep Liberty
Dec 13, 2010 | 1999 Cadillac DeVille
Feb 25, 2010 | 1989 Cadillac Sedan DeVille
Dec 12, 2009 | 1990 Cadillac Deville
May 31, 2009 | 1991 Mercedes-Benz E-Class
Jan 26, 2009 | 1988 Cadillac Sedan DeVille
Dec 19, 2008 | 2005 Ford F-150
Feb 17, 2016 | 1990 Cadillac Deville
494 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: