Last post on Sep 24, 2013 at 11:21 AM
You are in the Buick LeSabre
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Buick LeSabre, Engine, Sedan
#43 of 305 Re: 1987 Buick LeSabre Won't Start [imidazol97]
Sep 25, 2007 (3:46 am)
I have a 1997 buick lasabre and it too will not start. On my way home from work, it was sputtering like a car that has water in the gas or kind of like the fuel injectors are blocked in some way. Either case, when i got home, I took off a fuel line and turned the key on and its getting gas, the fuel pump is working, the spark plugs are getting a spark at the coil. I am at a lost to why it will crank but not start. Any ideas?? An auto shop told me it could be the EGR valve but thats for emissions and I cant see that as a culprit to it not starting. Does anyone have any ideas that I can check. Sounds a little to me like it jumped time or the timing chain broke..Any suggestions would be helpful
#44 of 305 Re: 1987 Buick LeSabre Won't Start [intimidatorjd3]
Sep 25, 2007 (1:05 pm)
Have you been losing coolant? Lots of vapor out the back when you first start up in the morning? Could be leaking coolant into the intake manifold>
Or you might have low fuel pressure
Or you might have an electonic ignition problem
Or you might have a MAF sensor that's coated with goop giving bad readings.
#45 of 305 Re: 1987 Buick LeSabre Won't Start [imidazol97]
Sep 25, 2007 (1:47 pm)
There is no water leaking anywhere in or around the engine compartment, or steam out the tail pipe.. We have had the car over a year and in teh morning, it has like vapor which is gone in a few minutes, but it losing water had started saturday and by tuesday the car wouldnt crank. I have had to add water everyday.I noticed that on one of the coils when I took the sparkplug off, it had alot more spark and I mean alot more than the other 5, does that mean anything? Can one coil overcharge or something to that nature that would cause it to not start. Plus one of my codes was random cylinder misfires, what could be the cause of that?
#46 of 305 Re: 1987 Buick LeSabre Won't Start [intimidatorjd3]
Sep 25, 2007 (4:23 pm)
Is your Buick an '87 or '97? If it's a 97 it could be an intake manifold leak around the seals at the throttle body or onto the lower metal intake portion.
The three coils are independent. Random misfires could be water fouling the plugs.
#47 of 305 Re: 1987 Buick LeSabre Won't Start [imidazol97]
Sep 26, 2007 (8:02 am)
My car is a 97 buick lasabre and I just found out that is needs an upper intake manifold. That explains where the water is going, which was out the tail pipe and I just didnt see that. I am somewhat of a mechanic...lol....How hard is it to replace the part myself as the garage wants a 700.00 to fix it. Can someone explain the installation of that part so I can save some money
#48 of 305 Re: 1987 Buick LeSabre Won't Start [intimidatorjd3]
Sep 26, 2007 (9:57 am)
Check to see if your UIM has the three round date stamps on top. One is the year, one is the month, and the date if I recall to see if yours is the original factory UIM.
I can get you a description of doing it. I have helped. It is doable if you work carefully and slowly and label the small screws and things that come out so you know where they go back. Unbolting the brackets for the injectors and wiggling the to get them loosened so they pop out for you is the most tedius. The exhaust crossover pipe does not have to be removed if yours is like the 98 I helped work on.
The throttle body is held on the end of the UIM by 3 small bolts. One is partially blocked by a small black bracke that helps lift the weight of the throttle body. That bracket can be tapped toward the front of the car out from under the small bolt and then it can be accessed straight on from the right.
You will have to decide whether you are going to redo the gaskets between the lower metal intake and the block/heads. If so it becomes a bigger job with more tedious pieces. The car I worked on did not change them.
The Dorman UIM sold by Advance Auto and others has replacement EGR pipes that come up out of the Lower Intake Manifold and carry the hot gases through part of the Plastic UIM. These are smaller than the originals and leave more room around the outside for intake air coming into the manifold to cool the pipe and the plastic. I'd recommend that kit. The little pipe is a press fit into the aluminum LIM plate.
#49 of 305 Re: 1987 Buick LeSabre Won't Start [intimidatorjd3]
Sep 26, 2007 (5:18 pm)
Be sure to drain the oil out as soon as possible. If coolant gets into the oil rather than burning away completely it is ruinous to the bearings. Do not continue to drive the car.
Drain the oil even if you're not ready to work on it and put in a few quarts of cheap oil to flush out any coolant.
Expect the spark plugs to need replacing also. They can be salvaged by cleaning while they're out. But if you're due for plugs, just change them.
Occasionally people complain that oxygen sensors are damaged by coolant going out the exhaust. Dn't change it unless there are symptoms afterwards.
#51 of 305 Starting problems
Jan 30, 2008 (3:53 pm)
I have a 2000 Buick Lesabre. The check engine light has been on for a while and I was going to take it into the shop this week. Last week, the car wouldn't start. I jiggled the ignition switch and it started. It worked fine for 4 days. Then one day it wouldn't start again. It will not take a jump. I jiggled the ignition switch and nothing. I took it to the shop and they said the neutral safety switch needed replacing, but they didn't work on transmissions, so I needed to take it to a transmission shop. They have run all kinds of tests on it, and don't know why it won't start. It is acting like it did one time when I accidentally put the spare key in it that doesn't have the computer chip in it. You just turn the key and it does nothing except make a faint clicking noise. The transmission shop is taking it to the dealership tomorrow. Does anybody have any idea of what might be wrong?
#52 of 305 Re: Starting problems [folderqueen]
Jan 30, 2008 (6:00 pm)
I know when funny things start happening it can be a weak battery or poor connections at the ground under the rear seat next to the battery. The cables at the battery should be checked. The battery itself should be checked. If it's the original you have an 8-year old battery. It may be newer if it's been replaced.
From what I've read from other H-body cars including Bonnevilles and LeSabres, strange things happening means look first to the battery and connections to be sure a low or erratic voltage there isn't hurting the systems. The starter not working one day and then working again could be that.