Engine Miss Question... - 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 04-22-2004, 10:13 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2003
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Pontiac735 is on a distinguished road
Default Engine Miss Question...

Just wondering if I can track down a short by pulling 1 spark plug wire at a time while it is running,its a 92 SSEi that I'm looking at,which has a miss to it at idle and under load,the guy told me it was the plugs and wires that were bad so I want to try this procedure.I'm new to the board and have been doing some searching on the subject but I didn't find what I was looking for.It also has a exhaust manifold leak....any help would be appreciated...Thanks
Pontiac735 is offline   Reply With Quote
Old 04-22-2004, 10:51 PM   #2
Senior Member
Posts like a Supercharger
 
Join Date: Mar 2004
Location: Columbia, MO
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
enmityst is on a distinguished road
Default Re: Engine Miss Question...

Quote:
Originally Posted by Pontiac735
Just wondering if I can track down a short by pulling 1 spark plug wire at a time while it is running,its a 92 SSEi that I'm looking at,which has a miss to it at idle and under load,the guy told me it was the plugs and wires that were bad so I want to try this procedure.I'm new to the board and have been doing some searching on the subject but I didn't find what I was looking for.It also has a exhaust manifold leak....any help would be appreciated...Thanks
Sometimes all you've got to do is wait until dark, start her up, and open the hood. Follow each plug wire with your eyes and look for arcs.

If you don't see any visible arcs, another method is to wrap some bare copper wire around a screwdriver (the big kind with square shafts work best, since the wire won't slip off as easily) and then wrap the other end of the wire around a (clean) ground point. Your screwdriver will then be a better ground than whatever the wire'* arcing to, and if you trace the wires (gently!) with the tip of the screwdriver, you might be able to draw an arc from a bad spot in the wire to the screwdriver.

One safety note about your suggestion, though -- you say you have an exhaust manifold leak. Keep in mind that if you start pulling plug wires while the car is on, the fuel in that cylinder obviously won't get burned, and unburned fuel vapor may begin to build up in the engine compartment through that manifold leak. Combine that with an arcing plug wire (or the one you disconnect) and you may create an explosion hazard.

-b
enmityst is offline   Reply With Quote
Old 04-22-2004, 11:29 PM   #3
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2003
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Pontiac735 is on a distinguished road
Default

Good point,never thought of that,I'll give your suggestion a try though,see what I come up with.Great forum,lots of info!!Thanks
Pontiac735 is offline   Reply With Quote
Old 04-23-2004, 02:03 PM   #4
Senior Member
Posts like a Camaro
 
Join Date: Dec 2002
Location: Northeast MS
Posts: 1,079
Thanks: 0
Thanked 1 Time in 1 Post
94SSEgold is on a distinguished road
Default

use the techinfo procedure for checking to see if you have any codes. if not, do the plugs and wires. The O2 sensor would come next, followed with an airfilter.
94SSEgold is offline   Reply With Quote
Old 04-23-2004, 02:14 PM   #5
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

A general rule of thumb:

If you don't know how old your plugs and wires are, change them. Factory wires are only good for about 50k miles. Are yours gray, and numbered for the cylinders? If so, change them.

And the advice above follows. Full tuneup. O2 sensor, PCV, fuel filter, air filter, and check/change that SC oil!
willwren is offline   Reply With Quote
Old 04-23-2004, 03:06 PM   #6
Senior Member
Posts like a Camaro
 
Join Date: Dec 2002
Location: Northeast MS
Posts: 1,079
Thanks: 0
Thanked 1 Time in 1 Post
94SSEgold is on a distinguished road
Default

thanx will, i new i was forgetting to tell him something.
94SSEgold is offline   Reply With Quote
Old 04-23-2004, 09:17 PM   #7
Senior Member
Posts like a Turbo
 
Join Date: Sep 2003
Location: Halifax Nova Scotia ASE Master Service Tech
Posts: 376
Thanks: 0
Thanked 0 Times in 0 Posts
A Bonnie Canuck is on a distinguished road
Default

My technique for testing wires is to spray them with water. If it runs fine while it is wet, then they are fine. But again it they are still numbered (original) change them and the plugs (for the cost).
A Bonnie Canuck is offline   Reply With Quote
Old 04-24-2004, 05:12 PM   #8
Member
Posts like a V-Tak
Thread Starter
 
Join Date: May 2003
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
Pontiac735 is on a distinguished road
Default

Thanks again,I might buy this particular car so I'm not sure how long the plugs and wires have been in,they look kinda old,spraying them with water won't work in this situation because it already has the miss,idiling and in driving range.I'm gonna take a good look at it tomorrow.The car has been off the road since about 2 years.
Pontiac735 is offline   Reply With Quote
Old 04-24-2004, 05:25 PM   #9
Senior Member
Posts like a Turbo
 
Join Date: Sep 2003
Location: Halifax Nova Scotia ASE Master Service Tech
Posts: 376
Thanks: 0
Thanked 0 Times in 0 Posts
A Bonnie Canuck is on a distinguished road
Default

Just pulling each plug and looking at them is probably the easiest and the best diagnostic tool you can have....especially it you could take digital pictures of them and post them for this site...

If you are really concerned about buying this car, do a combustion test. As long as each cyclinder is within 15 percent of each other, then it is fine mechanically (without crankshaft knock that is).
A Bonnie Canuck is offline   Reply With Quote
Old 04-24-2004, 10:52 PM   #10
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 3,392
Thanks: 0
Thanked 0 Times in 0 Posts
fuddyduddy121 is on a distinguished road
Default

I had a former GM service manager tell me that whenever they had a 3800 come in with a misfire, they automatically changed the plugs, wires, coils, and added some fuel system cleaner... Then they charged about $400 for it...

fuddyduddy121 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Question about 95 SSEI engine miss ubetido2 1992-1999 5 04-17-2008 10:23 PM
Engine miss, check engine light on - NO code mdrose64 1992-1999 12 07-16-2007 12:43 PM
Engine Miss Solved :D Tamara 1992-1999 2 08-20-2002 09:45 PM
Found My Exhaust Leak & Engine Miss! DeathRat 1992-1999 8 07-31-2002 10:21 PM
Engine miss! DeathRat 1992-1999 12 07-26-2002 01:22 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 04:24 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.