1991 CADILLAC SEDAN DEVILLE EMISSIONS FAILURE PLEASE HELP!!!!!!!!!
#1
1991 CADILLAC SEDAN DEVILLE EMISSIONS FAILURE PLEASE HELP!!!!!!!!!
HI MY NAME IS JOHN I HAVE A 1991 CADILLAC SEDAN DEVILLE I JUST PURCHASED IT IS NOT A TOURING MODEL HAS NO E CODES IN THE SYSTEM NO SERVICE ENGINE LIGHTS BUT FAILED SMOG TEST AT 323 IDLE SPEED HYDROCARBONS WHEN MAX ALLOWABLE IS 220 I READ SOME INFO SAID IT COUND BE A LOT OF THINGS I WAS WONDERING A LIL DIRECTION WOULD BE HELPFUL AS I JUST DO NOT WANT TO START REPLACING ITEMS UNTIL I FIND IT THANX JOHN HAS 135,000 MILES IDLES ROUGH A BIT
#2
RE: 1991 CADILLAC SEDAN DEVILLE EMISSIONS FAILURE PLEASE HELP!!!!!!!!!
Verify first that engine is running up to normal temperature. If running too cool, below 195 to 210 degrees, you can get this reading. I've also gotten past this reading by using one gallon of denatured alcohol to a half tank of fuel. Alcohol provides more oxygen to lower this reading.
Thread
Thread Starter
Forum
Replies
Last Post
blindpilot
Private For Sale/Trade Classifieds
0
07-07-2011 04:34 PM
MRDANGERUS
The Allante Pub
10
09-02-2009 11:05 AM
CrusinCaddy83
Private For Sale/Trade Classifieds
0
07-10-2007 12:39 PM