2000 Buick LeSabre

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Old 05-22-06, 12:02 PM
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2000 Buick LeSabre

I drove 4 miles to the mall and the car ran fine. Two hours later I started the car and it ran like it was on its last legs...missing and the "service engine soon" light came on. On the way home I stopped for another errond, and the engine was off for about an hour. When I restarted the engine, it ran just fine, but the "service engine soon" light is still on.

Any ideas what's happening?
 
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Old 05-22-06, 01:45 PM
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Originally Posted by fredmorrison
I drove 4 miles to the mall and the car ran fine. Two hours later I started the car and it ran like it was on its last legs...missing and the "service engine soon" light came on. On the way home I stopped for another errond, and the engine was off for about an hour. When I restarted the engine, it ran just fine, but the "service engine soon" light is still on.

Any ideas what's happening?
You need to have Troublecodes read, take it to Autozone where they'll scan it for you ( free ) and post codes here.
 
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Old 05-23-06, 05:26 PM
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Well I had the trouble code checked and sure enough it came up engine missfire (no kidding). At least I know it was number 1 cylinder and it missfired nearly 6000 times. Maybe it's that cheap gas I have been buying (yeah right). I think I will start with some fuel injector cleaner.
 
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Old 05-23-06, 07:15 PM
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well, you could have had a bit of bad gas. Maybe they sold you some water in that liquid gold. If it persists, check to see if you are getting proper spark.
 
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Old 05-23-06, 07:46 PM
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6000 times?

Wonder what kind of scanner they used that knows it misfired 6000 times I need one like that.My scanner just gives the code and problem no more.
 
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Old 05-23-06, 09:49 PM
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Originally Posted by fredmorrison
Well I had the trouble code checked and sure enough it came up engine missfire (no kidding). At least I know it was number 1 cylinder and it missfired nearly 6000 times. Maybe it's that cheap gas I have been buying (yeah right). I think I will start with some fuel injector cleaner.

I hope the injector cleaner helps but most likely it'll be a bad coil pack, if it misfires again I'd recommend to change coil pack bank 1, it's about $ 40 and very easy to replace ( 2 bolts and the wire plug ).
Remember these engines do not use a distributor so you have 1 coil pack per cylinder, mounted on valve cover 3 on each side in your case.
 
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Old 05-23-06, 11:35 PM
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Check cam sensor as my grand prix did the same thing and it was cracked sensor.
 
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Old 05-24-06, 04:23 PM
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Originally Posted by michael van
Wonder what kind of scanner they used that knows it misfired 6000 times I need one like that.My scanner just gives the code and problem no more.
It was a Snap-On scanner. It wasn't one of those hand held scanners like AutoZone uses. It's about the size of a small laptop, and it came with a number of plug-in keys depending on the make of car.
 
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Old 05-24-06, 04:32 PM
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Snap-On

Oh ok that explains it Snap-On makes some good stuff I will have to get in my Snap-On book and check it out. All I have is the Auto Zone one but it is limited to what it can do.

Yikes looked up the scanner 36 hundred dollars and I am not sure software is included. I better win that lottery.
 

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Old 05-24-06, 05:14 PM
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Originally Posted by LouBazooka
Remember these engines do not use a distributor so you have 1 coil pack per cylinder, mounted on valve cover 3 on each side in your case.
Huh. I'll be. Something I never heard of. No distributor? That ranks up there with the wizard (in Oz) saying to the tinman, "No heart?"
 
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Old 05-24-06, 05:26 PM
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that is right

just pop the hood on any late model car no distributer. none of my 3 cars have one. One is a Ford Taurus 2000 the other a 2000 Corolla and then the 2004 Tacoma no distributer in any of them kind of scarey dont you think?
 
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Old 05-24-06, 07:52 PM
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3.8 L buick motors haven't had distributors since the mid 80s
 
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Old 05-25-06, 02:27 PM
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Originally Posted by DaVeBoy
Huh. I'll be. Something I never heard of. No distributor? That ranks up there with the wizard (in Oz) saying to the tinman, "No heart?"
My 1996 Buick Regal Gran Sport (3.8 liter, V6) doesn't have a distributor either. It has 3 coil packs, each pack fires two cylinders, one on the compression stroke and one on the exhaust.

Christopher
 
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Old 05-25-06, 04:46 PM
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Originally Posted by towman501
3.8 L buick motors haven't had distributors since the mid 80s
A clue to you guys that I am more than 26 years old.

My car is a 91 Dodge and it has one. At least plug wires are poming out of something covered by a rubber shield.

My big job for the day was finding the cause of my misfire. Plug #3 had an almost invisible crack in the insulator...not even discolored....down by the electrode. Changed the one plug (see what a cheapskate I am?), and no more miss.
 
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Old 05-25-06, 04:52 PM
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Originally Posted by ChristopherT
My 1996 Buick Regal Gran Sport (3.8 liter, V6) doesn't have a distributor either. It has 3 coil packs, each pack fires two cylinders, one on the compression stroke and one on the exhaust.

Christopher
Come again? They don't just fire just before top dead center?
 
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Old 05-25-06, 05:13 PM
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no they fire but it is wasted

The way it works on two plugs per coil is it fires one plug just before TDC and the other on the exaust stroke valve open. Nothing is going to happen anyway on that stroke.
 
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Old 05-25-06, 06:09 PM
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michael,

Could they be doing this to help guard against backfire farther down into the exhaust system where it could detonate in the cat, let's say?
 
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Old 05-25-06, 06:58 PM
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Originally Posted by DaVeBoy
michael,

Could they be doing this to help guard against backfire farther down into the exhaust system where it could detonate in the cat, let's say?
No it's more a case of relying on a simplier circuit instead of one that could fire each plug independently. On the 3.8's, the coil packs get the signal to fire via a switched ground line - the battery voltage being applied all the time to the 3 coil packs primary circuit via the ignition control module. I just noticed that other engines with this system include the 2.2L 4, the 2.3L 4, the 2.5L 4, the 2.8, 3.1 and 3.4L V6's.

Christopher
 
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