Engine misfire

Transmission problem
1997 Buick Lesabre 6 cyl Front Wheel Drive Automatic

My car kind of putters when I take off from a redlight or a stop sign. If I let up on the brake and press on the gas very slowly it is normal, but when I do it at a normal pace it jerks for a few seconds then it is normal

My buick is 1990. But I also have that problem. It will jerk a little bit then stop. Then jerk up again. I was wondering if you have had any luck on the comment made by: rasmataz.

If so could you please reply?
I have already got new spark plugs oil change and im thinking about getting a new maf box.

My 1993 Buick Lesabre started showing signs of either a blown head gasket or blown intake manifold gasket. One day out of no where there was a hard continuous vibration on the car, there was thick white smoke coming out of the exhaust, oil level on the dipstick was higher than ever, and coolant was practically gone from the radiator. I tore it all up and I did the following things: had the heads resurfaced (which by the way are made of cast iron, and were checked for cracks), changed the head gaskets, torqued the head bolts to specs, changed the intake manifold gasket and exhaust manifold gaskets, cleaned the injectors with WD-40, new oil pressure switch, new coolant temperature sensor. After a full week I finished putting it back together, and it ran perfectly fine for three days. First thing I noticed the fourth day was a faint wisp of smoke coming out of the dipstick. But someone said it might just be humidity left over in the engine. They told me to run it a bit more and then change the oil again. Then yesterday, I took like a 30 mile drive in the morning and came back home with no problems. One hour later I turn it on to go to work and immediately there's this loud clicking sound which I could've sworn was coming from the valve covers, also there was an immediate loss of power. It would speed to like 20 mph and then it just wouldn't speed up anymore. When I got out of work and I was halfway home, the clicking noise was suddenly gone and was replaced by an actual misfire, with noticeable jerks on the engine and the exhaust pipe. I read online that the clicking sound might be caused by loose rocker arm bolts, so just today I took off the valve covers and there was nothing loose. Every single bolt retained the 25 ft lbs of torque I put. Tomorrow im going to do a compression test to draw more conclusions, but in the meantime does anyone have any ideas as to what it could be? Any advice is appreciated.

I also checked the pushrods and none of them were bent. It might be the lifters which by the way are solid not hydraulic.

Ok well the noise is definitely gone but it still continues to misfire. Another thing I forgot to mention is that when I recently changed the oil again (about a week after the head gasket job) it had tiny metal sludge stuck to the drain plug which has a magnetic tip, and I had never found any metal shavings at all when doing an oil change. So if we take this into account, what else could it be?

I have a 1997 Buick LaSable with a 3800 engine and have 128,000 miles on the car. After I have been driving about 40-45 minutes in the afternoon the engine starts to chug when I accelerate. For some reason this does not happen at night when it is a little cooler. I took it to a dealership. They replaced the plug wires; intake manifold gasket; and cleaned the fuel system. I still have the problem. No trouble lights show up on my dash board. What could be the problem?

Thank you for your suggestions. I will have this checked out.

John2

MAP? MAF? What do those stand for?

Thanks.

Engine Mechanical problem
1998 Buick Lesabre 6 cyl Front Wheel Drive Automatic 86000 miles

Car was missing, plugs are almost brand new. Checked plugs #1 and #4 were alot darker than the others. #1 and #4 were on the same coil, replaced coil and all plug wires. Seemed to correct the problem for a half mile or so, then car started missing again. Does not seem as often or as bad but still is missing.

Heater problem
1998 Buick Lesabre 6 cyl Two Wheel Drive Automatic 180000 miles

i took the resistor out and took it to a parts store they checked it out and said it was ok. Could it be the fan switch if so how do I take it out.

I have a miss fire, I changed the celinoid, wires, spark plugs, and it still ramdomly misfires. What can I do?

Engine Performance problem
1994 Buick Lesabre Two Wheel Drive Automatic 95000 miles

Engine misses some times at all speeds, when going up a hill or on the enterstate and it misses, I can tromp on it and it stops missing, could this be a ECU unit and if it is can I buy one and install it or dose it need some adjustments, will wait for your comments.