Last post on Sep 24, 2013 at 11:21 AM
You are in the Buick LeSabre
What is this discussion about?
Buick LeSabre, Engine, Sedan
#118 of 305 2002 Buick LeSabre Custom stalls but starts again
Mar 22, 2009 (9:13 am)
I have an 02 Buick LeSabre Custom, 3.8l. with 65,000mi.,and not showing a code. The problem I'm having is once it gets up to operating temperature it has a tendency to stall. It will start again but cranks a few seconds and sometimes you have to feather the pedal to get it started. It starts right up when cold. Once in a while if turn the wheel all the way when backing out of the driveway it stalls, but that's when cold.
If someone out there can help I'd appreciate it cause it's only getting worse.
#119 of 305 Re: 2002 Buick LeSabre Custom stalls but starts again [luvmytoyz]
Mar 22, 2009 (5:34 pm)
Check or replace fuel pressure regulator,then go to crankshaft positioning sensor,then the cam shaft sensor.
#120 of 305 Re: 2002 Buick LeSabre Custom stalls but starts again [luvmytoyz]
Mar 22, 2009 (5:44 pm)
I would start with the fuel pump. It would be nice to drive it with a fuel pressure gauge connected and lying against the windshield so you can see the pressure. If it drops when the car gets ready to stall, it's your fuel pump. It's kind of young for a fuel pump; has it been driven lots with low fuel which is rumored to let the pumps run hotter?
When it dies, turn the key off and on for a couple of seconds and listen to the sound of the pump. Repeat a couple of times to build up pressure. See if it start faster. The feathering could be fuel pressure. Also could be MAF sensor -- I believe I recall one person having that symptom. You can disconnect the MAF sensor. It also can be removed for cleaning--don't touch the wires buried inside the plastic. Just spray with MAF cleaner or use an artist's brush to dust them. Lots of MAFs have same part number; so if you have another GM with same part, you can switch the two for a while and see if the symptom moves.
The fellow who lives next to me inherited his father's Monte Carlo. It has 65K on a 95 and fuel pump went out. It was his second car and he always kept a minimum of fuel in it.
#121 of 305 97 Buick LeSabre Custom
Mar 23, 2009 (8:34 am)
My car cranks and then stops. It even cuts off while I'm driving whereas I throw it in neutral and crank it back up and will run, but here's the glitch:
1. We took it to AutoZone and was told it could either be the vacuum line or the oxygen sensor. We fixed that problem.
2. We tuned it up, new oil, new filter and everything, but it's still doing the same thing.
3. We then told one technician at O'Reilly's what was going on and he said it might be the ignition coil. What is that, and what does it cost to fix?
#122 of 305 Re: 97 Buick LeSabre Custom [nikkiro74]
Mar 23, 2009 (10:16 am)
Don't throw parts at the problem based on a counter person's ideas at a parts store. While they have lots of parts experience, they sell them; they don't diagnose. How many miles? What's been done to it?
It can be crankshaft position sensor.
It can be fuel pump. Try checking fuel pressure with a gauge while driving it. Some lose pressure as they heat up when running and cut out due to pressure dropping.
It can be the ignition module that's under the coils. It's doubtful it's just one of the 3 coils; you'd have rough running when one isn't working up to par. You can try disconnecting the power cables to it and reconnecting them. If it stays off long enough, you can pull a spark plug wire and have a spare plug ready to put in it and lay on metal part of motor while someone cranks to see if you get a nice blue spark. Or just lay the plug wire there--it should give a good loud spark.
It can be a vacuum line that has rotted or cracked. Check them all very carefully around the upper intake manifold. You can spray carburetor cleaner around the manifold and the vacuum lines while the motor is running. If there's a leak, when it sucks in the carb cleaner, the idle will change. Voila, you found a leak.
#123 of 305 Re: 2002 Buick LeSabre Custom stalls but starts again [imidazol97]
Mar 24, 2009 (4:55 pm)
Thanks for the idea's. Took the vacuum hose off the FPR, there was fuel all over. Put the one my brother bought for his Monte Carlo and the Buick run fine.
You think for as many years GM's been building these 3.8's they'de have them refined by now. As much as I hate to say it, at least the Japanese usually fix a problem when they find one.
#124 of 305 Re: 97 Buick LeSabre Custom [imidazol97]
Mar 24, 2009 (5:21 pm)
It had almost 147K miles on it, before a new engine was installed 2 months ago, so the mileage is not on the motor. The car was running beautifully up until about 2 weeks ago, when it started doing these weird things.
#125 of 305 Re: 2002 Buick LeSabre Custom stalls but starts again [luvmytoyz]
Mar 25, 2009 (4:50 am)
Glad I could help,the fpr's are the cheap ones GM put on them to get em out the
door,they don't last long at all.The fuel pumps usually go out around 80,000 miles.
Then the crankcase sensor!
#126 of 305 MAF Sensor Problems?
Apr 05, 2009 (10:47 am)
I have a 2000 Buick LeSabre. The check engine light has been on for a while, and I was told that the MAF sensor needs replacing, but it would be o.k. to drive it for a while. This last week, the heater quit working, and it has been running hot (not in the red but once, but the gauge is a lot further to the right than it should be). Then the other day it started jerking and acting like it was going to die when I was driving, but it never did die. When I let it coast, it doesn't do that, but when I put my foot on the gas it does. I have added coolant twice even though it didn't look like it needed it, but I had been smelling coolant for a while when I turned the engine off. Could these all be related to the MAF sensor needing replacing?
#127 of 305 Re: MAF Sensor Problems? [folderqueen]
Apr 05, 2009 (1:38 pm)
It sounds like two separate problems to me--the coolant/heater/overheating problem sounds like a leaking heater core--feel the carpet in the front passenger floorboard to check for a leak.