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Buick LeSabre Starting/Stalling Problems

168 messages,  Last post on Nov 29, 2009 at 1:45 PM

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#163 of 168 Re: Stalling while Driving [gboyle84] by imidazol97 Oct 22, 2009 (3:57 pm)
Replying to: gboyle84 (Oct 22, 2009 3:12 pm) Sounds like your brother is checking things. GEt a fuel pressure gauge, Autozone or others might loan them out, and check fuel pressure with the car idling and then with the vacuum hose pulled off the Fuel Pressure Regulator right next to the Schraeder valve when you tap in. I am not sure of pressure for your year, but they should be above 40.   Did you clean the MAF sensor? TAke it off and look at the two thin wires with tiny heat sinks in the middle for fuzz. Clean with spray mentioned above. Do not touch the wires.
#164 of 168 Re: Stalling while Driving [gboyle84] by imidazol97 Oct 22, 2009 (4:02 pm)
Replying to: gboyle84 (Oct 22, 2009 3:12 pm) Checks for crankshaft position sensor problems are not good. With some cars, they don't restart right away after dying hot. Throw cold water on the CPS cools it and the car starts right back up.   Another thing to mention is that more people than average have had trouble with the computer on 94 and 95 H-bodies, leSabres and Bonnevilles. You may be looking at a new computer (rebuilt) where you change the prom you have into the new remanufactured computer.   I think the original wires said Packard Electric. So ifyours say Delco or AC on them, they have probably been replaced. If they haven't hardened from heat, they are probably fairly fresh.   This case really begs for someone with another running equivalent car where you can switch the MAF sensors and switch the computer to see if that fixes your problem. j   Otherwise you need a Tech II or a computer analysis device to see what data the computer is seeing and sending. Replies to this message: gboyle84 (Oct 22, 2009 7:52 pm) gboyle84 (Oct 22, 2009 8:07 pm) imidazol97 (Oct 23, 2009 4:08 am)
#165 of 168 Re: Stalling while Driving [imidazol97] by gboyle84 Oct 22, 2009 (7:52 pm)
Replying to: imidazol97 (Oct 22, 2009 4:02 pm) So I took off the air filter and the elbow tube has a crack at the throttle body and that screen on the throttle body/MAF is dirty, so can I clean that screen with the MAF cleaner and can I clean that while its all still attached? Also, I took out the MAF to clean that and I am going to pick up the cleaner and new tube/pipe tomorrow to clean those off and a new air filter. when I took out the sensor just to get a better idea what it is, there was some sticky black "liquid" on the outer black housing like road gunk or really old oil that's all sticky. Anyway, wanted to see what ya thought about that. What OBD is the 95' buick cause I found a one and two plug so that confused me.   Do you think it could be the fuel filter? I have not changed that out, I'm guessing that the fuel gauge will tell me if that's bad.   Also, my horn doesn't work. I don't know it that has anything to do with this problem. My brother thinks that the car has a wiring malfunction in that some where there's a bad wire that's grounding out, do you think that may be the case?   Thanks again for all your help, if you are ever in Houston I'll buy ya a beer or something I really appreciate all the help. Replies to this message: gboyle84 (Oct 22, 2009 8:07 pm) imidazol97 (Oct 23, 2009 4:08 am)
#166 of 168 Re: Stalling while Driving [gboyle84] by gboyle84 Oct 22, 2009 (8:07 pm)
Replying to: gboyle84 (Oct 22, 2009 7:52 pm) Also, I found this thread http://www.car-forums.com/talk/showthread.php?t=1951 where the guy was getting weird O2 sensor readings leading to looking at fuel pressure and that was weird too and would drop normally once it was hot. Just wanted to added this. Thanks again
#167 of 168 Re: Stalling while Driving [gboyle84] by imidazol97 Oct 23, 2009 (4:08 am)
Replying to: gboyle84 (Oct 22, 2009 7:52 pm) Not sure what the elbow tube is. Is that the air intake flex portion that's like an accordion? The screen on the air intake comes off with a snap ring. The screen is hard to pull out, just gently use paper clips or something to hook different parts around the perimeter and wiggle it out.   The MAF sensor needs to have the two wires inside clean. They catch fuzz and form bits that change their sensitivity. MAF spray helps. I also used a camel hair artist type brush to gently help the MAF cleaner.   IF the air intake was leaking dirty air after the air filter through the accordian, that would explain the dirt on the honeycomb and probably helps dirty up the MAF.   The black goo is oil fumes from when the car is shut off that come up into the upper intake manifold. The goop also can coat the inside of the metal throttle body where the butterfly valve needs to almost seal. Many people remove the throttle body (3 difficult screws and lots of attachments) as a regular cleaning. It's difficult to clean with the throttle body on the car with just the honeycomb screen removed.   The black goo blocks the air that is supposed to leak around the edge of the butterfly throttle plate and upsets the ability of the idle air control to bleed enough air to keep proper idle.   The horn has a relay in the relay center. On one diagram that may be a different year, it's the 2nd from the passenger side. First is AC compressor, then horn relay. They may be the same part number and you can interchange them to test to see if the horn works with a different relay. That's the first thing to check.
#168 of 168 Stalling after filling up the gas tank by cbuick Nov 29, 2009 (1:45 pm)
I have a 2004 Lesabre. After we fill up the gas tank, the car stalls or spuders and then dies. It will start up again, but then repeats then stalls again. After 5 mins or so it will quit. I does not do this if we do not fill up the tank. Any help would be great!

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