99 Seville - Rough Idle at Startup (Full Version)

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99 Seville - Rough Idle at Startup

  

dtabbert -> 99 Seville - Rough Idle at Startup (6/24/2008 3:20:44 PM)

My Seville idles very rough after starting (whole car shakes).  After driving for a bit (mile or so) it smooths out.  This only happens once every couple of months or so.  Seems to occur after the car has sat unused for a few days, though this is not always the case.  The car has been doing this for the past 3 years since I bought it (purchased with 55K miles on it, today it has 110K).  Any idea on what could be the cause of this intermittent problem or a fix? There are no warnings or indicators flashing saying there is a problem.

  
Katzmans Caddy -> RE: 99 Seville - Rough Idle at Startup (6/24/2008 7:44:43 PM)

I am going to suggest the basic tune up items:
1. Spark Plugs
2. Wires
3. Coils
4. Fuel Filter
5. Air Filter
6. Clean Mass Air Flow (special cleaner in aerosol)

carnut -> RE: 99 Seville - Rough Idle at Startup (6/25/2008 9:46:14 AM)

My thought is a sticking injector. By sticking, I mean sticking closed or sticking open overnight so one cylinder floods. Sticking closed would cause a miss on the cyl. not getting fuel. Sticking open overnight would allow fuel to drip thereby flooding a cylinder. depending on duration, it might not set a code. So try some "SEAFOAM" fuel treatment to clean the injectors.

Katzmans Caddy -> RE: 99 Seville - Rough Idle at Startup (6/26/2008 7:13:06 PM)

quote:

ORIGINAL: carnut
So try some "SEAFOAM" fuel treatment to clean the injectors.


I think this is a good suggestion.

dtabbert -> RE: 99 Seville - Rough Idle at Startup (6/28/2008 3:34:06 PM)

Tried the tuneup (around 100K miles), did not fix it.  Will try the Seafoam suggestion.

Thanks a bunch for the suggestions!!  I let you know how it turns out.

  

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