''00 SLS rough idle at start

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''00 SLS rough idle at start

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Cadillac Forum >> Cadillac Models >> Cadillac Seville >> ''00 SLS rough idle at start

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''00 SLS rough idle at start - 7/1/2008 7:08:45 AM

chadmack

Posts: 9
Joined: 7/1/2008
Status: offline

New member, thanks in advance! My ''00 SLS idles rough at startup until I rev the engine a couple times, then strong smell(fuel maybe) then it is fine. After some research am I guessing right that I need to pull codes first? Or a cracked plenum? Any help would be greatly appreciated!

Post #: 1

RE: ''''00 SLS rough idle at start - 7/1/2008 7:29:28 AM

chadmack

Posts: 9
Joined: 7/1/2008
Status: offline

Pulled the codes and came up with only one, ABS C1246(brake lining wear circuit open). They were completely wore off so I didn''t reconnect them. Next step anyone? Thank you.

(in reply to chadmack)

Post #: 2

RE: ''''''''00 SLS rough idle at start - 7/14/2008 7:11:23 PM

slowroll

Posts: 1254
Joined: 10/3/2007
Status: offline

If you are still out there, check fuel pressure regulator.

(in reply to chadmack)

Post #: 3

RE: ''''''''''''''''00 SLS rough idle at start - 7/15/2008 6:51:40 AM

chadmack

Posts: 9
Joined: 7/1/2008
Status: offline

If I remember the maintenance records correctly, I believe the fuel pressure regulator was changed at 13k miles. I will get it looked at....or is this something me and my neighbor can figure out....?

(in reply to slowroll)

Post #: 4

RE: '''''''''''''''''''''''''''''''''''''''''''''''''''... - 7/15/2008 7:17:48 AM

Katzmans Caddy

Posts: 1268
Joined: 12/3/2006
Status: offline

What is it with everyone lately going to the plenum? Check for vaccum leaks, have a look at simple things, fuel filter and air filter. After that I''''m suggesting plugs and coil. Change the plugs, they are probably 8 years old anyway same for coils. Not cheap to change coils but not a bad idea either.

I have an old muscle car and it was running badly. I did a tune up, points, rotor, Dist Cap, wires and plugs. I was able to take 3/4 of a turn out of the idle mixture and the car runs awesome now. It proves what good these parts do, 3/4 turn on idle mixture is huge, I''''ve gone from gas sucking to gas miser.

(in reply to chadmack)

Post #: 5

RE: '''''''''''''''''''''''''''''''''''''''''''''''''''... - 7/15/2008 4:36:28 PM

slowroll

Posts: 1254
Joined: 10/3/2007
Status: offline

Based on fuel odor - ruptured fuel pressure regulator diaphragm is worth checking - just pull off vac hose and see if fuel leaks out, if it does you need one.

(in reply to Katzmans Caddy)

Post #: 6