1999 Buick Lesabre Engine problems

My car is a 1999 buick la sabre with a 3.8L engine. July/20/2012 my car had 80,000 miles on it when my engine started to miss. When I got it looked at by my friend I was told there was coolant in the cylinders. The engine had problems with the intake plenum leaking coolant, because of the egr system. He then fixed the car. On november 20, 2014 my engine had 138,000 miles when it overheated on the highway. I found no coolant in the reservoir with coolant in the oil. When my friend looked at my car he said it was the...

Traveling about 65 - 70 mph I noticed my speedometer went 'wacky', meaning it went down to 0 - 20 mph and back up again to the speed I was traveling. Nothing else happened. The next time, maybe a week to a couple weeks later it did I it again, only I heard the doors unlock and it had died. Since then it has been happening more frequently. I have always been able to start it right back up. I can be out on the highway or in town. I usually put it into neutral, start it and keep going. It has happened as many...

In approx 2010 my buick lesabre had issues starting and would occasionally stop operating during travel. All ignition functions would cease to work. Towed to buick dealership to resolve and replaced ignition switch. This year a similar action happened where the car would not start. Again at the dealership the ignition switch was replaced. Is this ignition switch issue included in the gm recall? *Tr

Tl* the contact owns a 1999 buick lesabre. The contact stated that upon starting the vehicle, a loud noise was heard and white smoke emitted from the engine compartment. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure and current mileage was 114,000.

Antifreeze leaking into engine through intake manifold plenum causing expensive replacement engines and or parts. Dangerous if engine locks up while driving. *Tr

Car was getting harder to start each time- red light (overheating) came on while on a trip- added 4 + qts of water- drove 15 miles- car would not start--added 3 + qts of water--tried several things to try to start--noticed oil level was up-- assumed coolant went into engine- removed 3 front spark plugs--coolant ran out of spark plug openings- car was towed 60 miles- intake manifold (warped), gaskets, & thermostat were replaced- starter replaced due to broken housing (from attempting to start water logged engine)- total expense approx $ 1,000

Engine seized and wouldn't start. Found the intake manifold full of antifreeze. Caused by a faulty intake manifold. Replaced manifold, changed oil and antifreeze and replaced cracked starter. *Tr

This concerns a defective design of the intake manifold used by gm on 1998, 1999, 2000, and some 2001 buick lesabre's equipped with the 3800 series ii v6 engine. Following the failure and resultant hydraulic engine lock of a neighbor's 1999 buick lesabre with approximately 80,000 miles on the odometer, I visited our local buick dealer (lee chevorlet/buick - washington, nc) to discuss what appears from research done via the internet to be a frequently encountered problem on these vehicles so equipped. It seems that...

Tl*the contact owns a 1999 buick lesabre. The contact stated that her vehicle shuts off and fails to restart. However, while driving at an unknown speed, the vehicle shut off and then restarted immediately. Later that same day, the contact stated that the vehicle would not restart for approximately an hour and a half. While idling at a traffic light, the vehicle shut off and took 15 minutes before it restarted. The failure continued to recur intermittently. The vehicle was taken to an electrical mechanic...

Wife's 1999 buick lesabre with 90,000 miles on it was burning antifreeze in engine. I was told by a certified gm mechanic to try tightening throttle body mounting nuts because being too loose was a common problem from the factory. Did that 6 months ago and it seemed to help even though the manifold throttle body mounting surface was warped due to the engine heat. Over the past month the car became increasingly hard to start, burned large amounts of antifreeze, and would stall intermittently. On march 13, 2008 ...

1999 Buick lesabre with stalling problems. Consumer stated that the vehicle began to stall while turning or stopping. He states that no codes showed when the vehicle was tested. *Kb the consumer stated several parts were replaced on the vehicle such as; the fuel pump, and battery but the vehicle continued to stall. *Jb

1999 Buick lesabre with a air flow sensor malfunction within the emissions system. Customer states that the check engine light illuminated sporadically. Then the engine failed completely. *Kb

1998 Buick lesabre. Consumer states that the upper manifold plenum which buick changed to plastic overheated and melted causing a hole which allowed antifreeze to combine with the oil. *Mc *jb

Failure of intake manifold gasket on 1999 buick century causing antifreeze to leak from manifold, leaking antifreeze into oil. Cost of repair $1300. 71,000 Miles. *Tr

Tl* - the contact owns a 1999 buick lesabre. While driving 65 miles per hour, the contact's check engine and oil warning lights turned on, at which point, the engine stalled. The contact was unable to restart the vehicle and had the vehicle towed. The contact's current mileage is 37,000 miles. Per the contact the nhtsa website sited the incident is a common problem. Per the mechanic, the failure was due to the intake manifold flooding the engine. The contact stated that several components were damaged including the starter, spark plugs, and a gasket. The contact called general motors and was told that the intake manifold had previously been repaired in 2004. *Nm

1998 Lesabre stalled while driving on the highway. *Ts the first time the vehicle stalled, the problem was diagnosed as a cracked cylinder head and damaged plenum. On another occasion, when the vehicle stalled, the mechanic forgot to reconnect the alternator. The dealer stated another reason why the vehicle stalled on one of several occasions, was because a crankshaft sensor had failed, but was not related to the previous problems, however later that day the vehicle stalled again. The serpentine belt failed, which caused the consumer to lose power steering. *Jb

1999 Buick lesabre plastic intake manifold failed. *Ts *jb

1999 Buick lesabre v6 3.8L engine, 82,000 mi. Had been experiencing some surging, no other symptoms. 8/05 Drove home, parked car, went out next morning and auto would not start. Towed to dealer service dept. Who found "water in cylinders". Used "stop leak" as temporary repair. 11/05 Engine again locked, unable to start. Water in cylinders, water in oil. Contacted buick customer service who suggested engine replacement or purchase of new vehicle. Independent mechanic informed me of "class action" suit due to...

Dt: the contact stated that when pressing on the gas pedal it hesitated. Also, rear side window will not go up or down. The window on the passenger's side will not go all the way up and it will not seal. Also ,the headlights came on and stayed on. The dealership reprogrammed the light and it came back on. The manifold intake blew out, costing the contact $150 to replace the intake gaskets. The brakes were noisy all the time. When making a left turn the flap will rub the tire, and it caused the tire to blow out .*Ak

While driving the vehicle stalled. The driver pulled over and turned the vehicle off, but was unable to restart it. Vehicle was then towed to the dealership, but the mechanic determined that the problem could not be duplicated. *Ak vehicle would stall while driving at any speed. The fuel pressure regulator was replaced under recall 03054 and the ignition control module was also replace but neither of these repairs corrected the problem. *Bf *nm

The vehicle's engine blew while the consumer was slowing for a stop light. *Nm the vehicle displayed a hard start and was missing. The coil pack was replaced. The intake plentum leaked water into the cylinders. *Sc *jb

There is a part which is called the plenum. It causes a problem with the gasket, which messed up the intake manifold. Took to the dealer, but problem recurred.

Problems with intake manifold and fuel intake.*Mr the vehicle suddenly backfired. The vehicle was take to the dealer where the computer was scanned. The computer indicated that coolant there was coolant in the intake manifold. *Nm

The vehicle was takento dealer on a recall and mechanic determined that there was a leak in the intake manifold.*Ak

While driving vehicle stalled. Consumer was unable to restart vehicle. Had the vehicle towed to the dealer for inspection, and mechanic informed consumer that the problem could not be duplicated or resolved. *Ak