Did a LIM/UIM and 20 miles later have a Cylinder 4 Misfire - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-04-2008, 06:12 PM   #1
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Sep 2007
Location: Indiana
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
famouslee99gt is on a distinguished road
Default Did a LIM/UIM and 20 miles later have a Cylinder 4 Misfire

Just got the car back together and running last night after doing a lower intake manifold gasket on my 2000 SSEi. Everything was doing good last night for my test drive and even on my drive to work. Leaving work, SES light came on, and it felt like the car was surging, but still running ok. Put it on a scanner, and it came up as a cylinder #4 misfire. Got home and pulled the spark plug and it looked ok. I even swapped the plug with one from the front #3 or #5. Still doing it, got a different wire and tried it on cylinder #3, #4, #5 and still doing it. Almost feels like it'* not surging upon initial start up, but starts a couple seconds later, I had pulled the wire off the coil while it was running, and it'* sparking. I'm not sure where to go now and don't want to take it to a shop.

Looked back in the owner'* manual and a previous owner had replaced the spark plugs and wires about 2 years ago, less than 30000 miles ago.

Anyone have any ideas?
famouslee99gt is offline   Reply With Quote
Old 01-04-2008, 07:54 PM   #2
Senior Member
True Car Nut
 
Join Date: Jan 2004
Location: Lakeville, MN
Posts: 4,328
Thanks: 0
Thanked 1 Time in 1 Post
fantastic88 is on a distinguished road
Default

Sounds like that coil pack may be bad.
fantastic88 is offline   Reply With Quote
Old 01-04-2008, 08:06 PM   #3
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Sep 2007
Location: Indiana
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
famouslee99gt is on a distinguished road
Default

without a wire on the coil, the coil is arcing away. I just went out and looked and cylinder 6 wire was very close to the o2, but not touching. I moved it away and it felt like the car was no longer shuttering at idle. I don't have a away to reset the light tho. I tried battery discount, but maybe have never waited long enough. I'll reset it at work tomorrow.

At the same time, with it saying cylinder 4 misfire tho, why would #6 wire being near the o2 be related?
famouslee99gt is offline   Reply With Quote
Old 01-04-2008, 11:10 PM   #4
Senior Member
Posts like a Turbo
 
Join Date: Sep 2007
Location: Saginaw, MI
Posts: 345
Thanks: 0
Thanked 0 Times in 0 Posts
TheDude is on a distinguished road
Default

Did you replace the injector o-rings? The reason why I ask is because the injectors tips are really brittle and easy to crack when removing the old o-rings (trust me, ive done it). If the injector tip is cracked then it could cause a misfire on one cylinder
TheDude is offline   Reply With Quote
Old 01-05-2008, 09:10 AM   #5
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Sep 2007
Location: Indiana
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
famouslee99gt is on a distinguished road
Default

Yes I replaced the injector o-rings. After moving #6 wire away from the o2, upon driving to work today, it did surge when at stop signs/lights. I'm gonna clear the code and see if it comes back
famouslee99gt is offline   Reply With Quote
Old 01-06-2008, 10:39 PM   #6
Junior Member
Posts like a V-Tak
Thread Starter
 
Join Date: Sep 2007
Location: Indiana
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
famouslee99gt is on a distinguished road
Default

Problem solved! Cleared the cylinder #4 misfire code. Listening under the hood and could hear a vacuum leak. Looked around and discovered the o-ring on injector #4 was torn. I noticed when I pulled the injectors off, that injector actually was missing half of the plastic lower ring that sits against the o-ring.
famouslee99gt is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Changed UIM/LIM and TB gaskets. Now have a p0107 MouSe 2000-2005 26 04-20-2012 10:33 PM
UIM/LIM gasket questions (yes, I have searched and read some) Maximus 2000-2005 44 03-03-2011 08:27 AM
UIM and LIM replaced now leaking coolant out of UIM gasket Paul1981 2000-2005 10 12-21-2007 11:05 PM
Replaced UIM, 400 miles later big problems 95greense 1992-1999 1 08-26-2005 12:56 PM


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 12:08 PM.


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.