'94 Bonneville SSEi - rough running - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-02-2005, 05:07 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Dec 2004
Location: NJ - USA
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Snowflake is on a distinguished road
Default '94 Bonneville SSEi - rough running

Ugh, I just bought this car. Was loving it up until 2 days ago. I went into the store and when i started the car it seemed really rough. Even idling. So I get it home. But I can't go over 50 on the highway or else it was shaking like all hell. The plugs were just done 3 months ago. Also when I had it in park and stepped on the gas. It almost sounded like it was missing. I'm just going to have the shop check it out unless it'* something i can handle. I found a small amount of oil in the coolant. Or what appears to be. And I had it flushed. So far it doesn't look like there'* any more in there. I checked the oil, looked normal in color. And there'* no white smoke so I don't think there'* any coolant seeping into the engine. The supercharger is leaking from the snout, and the intake seal. Doesn't look like GM supercharger oil to me.
Snowflake is offline   Reply With Quote
Old 01-02-2005, 06:17 PM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Don't let that SC run dry. With proper maintenance, it'll outlast everything on the car. The Nosedrive can be rebuilt by you, especially if it'* just the snout seal.

Rough running is ignition 99% of the time. Check your plugs to see which ones are fouled, and use that to determine if it'* a common pair to a coil, or a single (probably plug wire).

Your miss, however, sounds severe enough to be 2 cylinders, which would lead me to believe coil.
willwren is offline   Reply With Quote
Old 01-02-2005, 06:45 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Dec 2004
Location: NJ - USA
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Snowflake is on a distinguished road
Default

how would i go about checking the coil?
Snowflake is offline   Reply With Quote
Old 01-02-2005, 09:29 PM   #4
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Dec 2004
Location: NJ - USA
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Snowflake is on a distinguished road
Default

well, i checked the coil. Spark from all plugs. Tomorrow ill have to pull each plug and look @ them. Little too dark now.
Snowflake is offline   Reply With Quote
Old 01-02-2005, 09:31 PM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Dec 2004
Location: NJ - USA
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Snowflake is on a distinguished road
Default

damn Haynes manual doesn't include information about the SC.
Snowflake is offline   Reply With Quote
Old 01-10-2005, 12:36 PM   #7
Senior Member
Posts like a Northstar
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default

Unless I'm mistaken, the photos show what looks like it may be coolant. You could have a small coolant leak under the intake. I had a leak like that on my '93 and found that one of the intake bolts wasn't tight.

If the supercharger snout is leaking oil, it'll originate near the pulley and run down the snout towards the base of the supercharger. Using your finger (while the engine isn't running!), touch the underside of the snout just behind the pulley - if it'* leaking, your finger will have supercharger oil on it. The supercharger oil is clear but will probably have black engine dust in it. The oil seals on these superchargers seem to be prone to leaks. If you do decide to replace the seal, consider using a Viton seal rather than a nitrile rubber seal.
billha is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
'64 Bonneville Running Rough T/Akeith Classics (Star Chief and 1957 to 1986) 5 03-14-2015 07:39 AM
1996 Bonneville getting 16 mpg and running rough at start up BumpinBonneville17 1992-1999 5 01-10-2008 11:28 PM
rough running 1994 ssei 1337ssei 1992-1999 20 12-09-2006 11:35 PM
rough running ssei SSEi ya 1992-1999 3 07-22-2006 12:38 AM
STILL***running / ideling rough......less power......93 ssei mikey 1992-1999 28 07-07-2006 08:55 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:53 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.