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Buick LeSabre: Problem Codes/TSBs/Recalls

75 messages,  Last post on May 12, 2013 at 1:38 PM

You are in the Buick LeSabre Forum.

What is this discussion about? Buick LeSabre, Auto Repair, Sedan

Messages Page 8 of 8

#66 of 75 1995 buick by pigg

Sep 18, 2010 (6:19 pm)

the car has a new battery. the car sat for about 2 years. the cables have almost no voltage drop. .02 to be exact.i am a volvo tech for over 28 years. but not use to gm . thanks for any help. if i can you with any volvo issues contact me.also on the parkway the oil light will come on first when the stalls, sometimes the car will restart itself depending on speed. thats how fast this can happen. the cars has 18850 miles on it.

#67 of 75 Re: 1995 buick [pigg] by imidazol97

Sep 18, 2010 (7:29 pm)

Replying to: pigg (Sep 18, 2010 6:19 pm)
Do you have access to a scanner to use while it's running to follow the input for the fuel injectors and the ignition?
 
It could be a few cars have had trouble with ground on the end of the ISC under the coils. Clean contacts.
 
But the other thing that comes to my mind is that 1994 and 1995 seem to have a few more reports than typical of PCM problems. You might clean contacts at the PCM or replace it with a junkyard piece or just switch from another leSabre, if a friend has a similar one, to see if that fixes it.
 
Just from listening to Bonneville and leSabre (and a few Olds) people with the problems in other forums, I'd guess PCM. The odd thing, if your sense of the timing for the oil light to come on so quickly is right, is that the engine is not dying and the oil pressure dropping causes the light to turn on after the revs drop. Instead, it's being reset by a complete drop in voltage or the PCM.
 
It might be worth running a long line to the positive terminal for power away from the battery and using a meter inside the car to watch for voltage drop at the time the problem happens. I'd suggest using a ground out on the motor or on the computer box area. That might catch if you're losing B+ or ground at the PCM.

#68 of 75 pigg by pigg

Sep 20, 2010 (8:06 pm)

someting new, the car died, only the oil light went on. left the key in position 2 the fuel pump relay the low fan relay, the check engine light, the temp light and the voltage light turns on and off.the batt voltage 12.86 no voltage drop to talk about at the batt. i do not have a wireing digram of the pcm. this feels like a voltage condition or a pcm. after car starts batt voltage back to 13.84.this was the first time thime i did notice this . i want to thank all of you for all the help thats been given. if this rings a bell with anyone. i would love any advice

#69 of 75 1995 buick cut out when driveing by pigg

Oct 20, 2010 (6:31 pm)

the repair was the pcm. thanks for all the help.

#70 of 75 Re: 1995 buick cut out when driveing [pigg] by imidazol97

Oct 20, 2010 (7:55 pm)

Replying to: pigg (Oct 20, 2010 6:31 pm)
Glad you found it.
 
Thanks for reporting back. That may help someone else with a related problem when they read the forum.

#71 of 75 Re: 1998 Buick 3800 Motor Check Eng Light [Sizzlerdon] by razielvalek

Feb 26, 2011 (3:00 pm)

Replying to: Sizzlerdon (Dec 16, 2008 2:34 pm)
I just had mine tested and it came up with P0300 "Random Misfire" the mechanic said it's more than likely a tune up deal new wires and new plus it runs and Idols fine but the spark plugs do need changing

#72 of 75 93 Park Avenue with 3.8l supercharged Quad B driver code by knightofwiz13

Mar 06, 2011 (2:55 pm)

93 Park Avenue with 3.8l supercharged Quad B driver code, replaced PCM and EGR still happens any thoughts no TCC shudder. SES light only comes on when coasting with no throttle.

#73 of 75 Re: 1995 buick cut out when driveing [pigg] by quackula

Apr 01, 2011 (3:29 pm)

Replying to: pigg (Oct 20, 2010 6:31 pm)
Hi,
This sounds like the exact problem that I am having. Sometimes the engine will shut down leaving the change oil light flashing, I will about ten and it will start right back up again or sometimes you can see the electrical system shut down, the change oil light flashing and come back to normal. After you have replace the PCM any further problems? Thanks.

#74 of 75 2001 Buick LeSabre P0420 code by signots

Aug 15, 2012 (10:09 am)

Service Engine Soon light came on. A friend read the code and cleared it. A few weeks went by and now it's on. Car runs like like before; no issues. What is P0420?

#75 of 75 Re: 1998 Buick 3800 Motor Check Eng Light [magm66] by repairdad1

May 12, 2013 (1:38 pm)

Replying to: magm66 (Apr 26, 2009 8:35 am)
If the crank or cam sensors fail you have No start at all. If you have the tools and the abilty pull the valve covers and check the torque on the valve train and head, autozone can print out the specs for them and if you have a Harbor frieght near you can pick up the two torque wrenches for about $30. I suggest this because they may have been loosened to replace the lower intake gasket,theres no reason to do so but it`s a possibility.Also if you had the upper and the lower intake gaskets replaced depending on how many miles the engine had on it you probably should have replace the head gaskets also.It adds about 4 1/2 hours to the job and about $80 in parts And last did you check the two metal tubes under the EGR valve if they have a leak you won`t get proper manifold pressure

Messages Page 8 of 8

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