Buick - Century :: 2000 - Transmission Will Shift Hard After Stopping At A Light Or Stop Sign
Dec 24, 2013
I have a 2000 Buick Century that only has 70000 miles on it. I have an issue that when I drive the car for a while, the transmission will shift hard after stopping at a light or stop sign. It only does it through the first three gears. If I shut the car off and let it sit for a few minutes and start it back up, it shifts fine through all of the gears. I have not had the change to change the fluid and filter yet. The fluid looks clean and is always full. I have read that there has been a common problem with a pressure control solenoid in the transmission needing replaced to correct the hard shifting. I am not getting any kind of error codes from the PCM, so I am not sure.
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I need to solve tranny problem, it started out a while back, would not shift back into drive after stopping at stop sign (after driving fine for about 20 miles) thought maybe dirty filter so did fluid and filter change seemed to work for a while then started again noticed it was mostly after using cruise control, but u joints were very bad, so replaced 2 of the 3 and worked fine for about a thousand highway miles, then got really bad. Now when I check the tranny fluid cold and /or hot it is way up on the dipstick. Took to ford dealer in ladoga, lied and said no speed sensor codes, but list on the paper he gave me had all kinds of abs and a p500 code.
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Issues with the transmission in the 2000 Century. My car shifts perfectly fine cold, but once it warms up it shits hard between all gears. Downshifts are never an issue, just up shifts. To me this sounds like both shift solenoids may be sticking or shot... I have already drained the fluid and changed the filter, added lucas tranny stop-slip, drained that out and replaced fluids again... no codes to go by and no high revs before shifts when accelerating...
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Trying to troubleshoot a very intermittent (has happened on two different occasions during the last 1,000 miles) hesitation from a stop-light. I've been recording engine parameters (Torque application) on both instances as these have been during longer trips after a period of highway driving. 2004 Excursion, 112K miles.
This feels kind of like severe turbo hesitation (4 to 10 seconds trying to start out before it kicks in) but I don't think that's it. The turbo is a new PowerMax turbo replaced 5 months ago. VGT readings seem pretty normal. The EGR valve is new -- the first instance was with the old and the second was with the new. I've also recently replaced the EGR and Oil coolers (before this).
Here's what's interesting in the captured data though... Normally when I coast into a stop-light the indicated engine load stabilizes at about 40-50% and VGT moves to about 65% to 70% at idle. The two different times this happened (actually multiple times at stop-signs/light close to each other over 5 minutes or so for both of these), when I have coasted to the stop, the engine load increases from low values during coast-down (0% during freeway coast-down or 19-30% during other coast) up to 99.6% (or other similar high values) at idle and VGT seems to be full closed at 85%.
There is absolutely no response to the throttle in this situation for 5-10 seconds. I've either been goosing the throttle a bit or putting it neutral and revving it up first to get things going again. When it finally catches and starts accelerating with power, indicated engine load drops to 50-60% again and VGT opens up to 40-60% or so. None of the other parameters I've been capturing seem to read strangely during this that I recognize. No issues observed during cruise and power seems good. No pending DTCs or engine light.
Here's what the data points I'm capturing (once each second):
Boost
Calibration Input Volts
ECT
EOT
Fan RPM
FICM main volts
Fuel Injector pulse width
ICP
ICP Volts
IPR Duty cycle
RPM
Engine Load
MAP
Trans Temp
VGT Duty Cycle
EBP
EGR Commanded
EGR Error
Added today but not captured during these issues yet:
IAT
IAT2
Baro
Accel Pedal Position
Mass Airflow Rate
Mass Fuel Desired
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-We have a 99 Buick with 38,000 miles. At 30,000 miles the car overheated and we had to find a mechanic in unfamiliar area. He told us car was unsafe to drive unless we had new radiator system installed (water pump, radiator flush, pressure test, radiator system flush, radiator kit (premium), anti-freeze - 2 gallons, lower and upper radiator hoses) at a cost of almost $1200.
FYI the car is in Florida full time - under cover.
Recently the "low coolant" signal has come on and after checking with a local mechanic, he said the manifold gasket was leaking and it could be fixed for about $600. We are reluctant to spend that money unless we can feel somewhat certain that the main problem is solved. We understand that at some point there was a class action suit against GM because of problems with Dex-Cool which is the required coolant for GM cars. In the meantime, we have been adding plain water to the reserve tank but are very concerned that this may cause additional damage. There is never any leakage under the car.
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My problem is my 6 CL died going down the road I got to stop light & she quitly died. I got it started after a few tries & made it to BK, kept trying to start sounded like choked for gas. Hour later starts goes 1/2 mil dies call towtrk. Changed fuel pump(not so bad) fired her up, first couple times ran a sec. and died.
3rd time a charm it started & idled (a lttl ruf) for 20 min.& wife takes it to gas station shut off & restarted no problem & back home. 1 hr later I get in to run an errand & it dies I push it hm pop hood seems awfully hot. Is there a way to test the CPS unit?
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I have a 1991 Buick century with 160,000 miles. It wasn't driven for about a year and about 8 months ago I changed the plugs, wires, and oil and it has run great since then...until yesterday. Now, every time I slow down to come to a stop (or below 20mph) the car jumps and jerks and acts like it is wanting to lock up and stalls. It starts back up put every time I put it in drive (just drive) it stalls again. I end up having to put it in neutral, rev the engine, then put it in drive real quick. Talking to my dad, who I got the car from, he told me it used to have this same problem and that is why he quit driving it. We have a couple of theories
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2000 Buick Century Custom with 140K miles: Service Engine Light came on. Re;placed gas cap, light still on. Took to dealer who replaced HO2 sensor, light still on. Took to dealer who found no problem but charged $100 for looking. Light still on. Took to dealer who said it needed two major parts. Light still on. Took to another mechanic who could find nothing wrong. Light still on. Is there hope?
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The car died on me the other day at a stoplight but started up again (It resisted for a sec but then caught). Now it's taking a bit to start and sounds very faint when it finally catches and the turn over is slow. I'm no mechanic but I can replace parts. I'm just wondering if it's the fuel pump or injectors, maybe low fuel pressure. I haven't had a chance to do anything to it. Where to start?
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My 2007 elantra has been rumbling when i change gears occasionally and sometimes when stopping at a stop sign the car just dies. The car starts right up though as if nothing happened. It only happens like twice a week but i really want it fixed. I already changed the motor mount next to the engine block on the left. Could it be the motor mount connecting to the transmission?
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I am having some trouble with my 02 Buick recently. The acceleration from a stop is very sluggish and gear changes come slowly, although they still seem to shift smoothly. The first thing I did was check the fluid levels and I can find nothing wrong there. The trans fluid was last changed 3 years ago, but the level, color, and smell are all normal so surely that couldn't be the culprit ?Unfortunately, that about exhausts my diagnostic skill.
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My 1992 Buick Century frequently shuts down when coming to a stop or slowing down to make a sharp corner. I'm always able to restart it. I thought it was a torque converter lockup problem, but my transmission specialist said the transmission is okay. Last month, after the car died completely, I had the crankshaft sensor and harmonic balancer replaced by Firestone. Could it be the same parts that malfunctioned? Or, could it be another issue?
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So I have squealing in the front of the transmission under hard acceleration. It also happens when I rev the engine while in Park. Could it be in the transmission or would just replacing the torque converter work? This is an 01 buick century with 150k miles.
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I have 2003 Buick Century. I started having problems with the car after coming to a stop, accelerating - the car starts to go hesitates, then jerks a bit to go. This does not happen every time after a stop but when it does the service engine soon light comes on. Initially I got the P0401 code (I think) and took it in to a mechanic. They could not find anything wrong with the car but did clean out the EGR valve, that didn't work, they worked on my transmission and replaced other parts, still no success.
I took the car to another mechanic who replaced the EGR valve and several other small parts. I still had the problem but this time the error code was P0420. I took it back again and replaced the spark plugs, O/2 sensor, catalytic converter. That hasn't fixed the problem. The mechanic said that they have taken my car for several test drives and the car has not demonstrated the problem. The error message still reads P0420 even after all of the parts have been replaced. The 2nd mechanic has washed his hands of my problem.
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I have a 2000 Buick Century that I cannot get to start. While my wife was driving home it started to sputter (like running out of gas) and did a little back firing. She made it home and I put in some gas (Just to make sure) and the care cranks over but will not start. I have replaced the fuel filter, checked the spark plugs and replaced the CAM Sensor. The car still will not start.
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My wife has a 2000 Buick Century with about 150,000 miles on it. It has been relatively trouble free. Recently, the "low coolant" light began to come on.She took the car into a garage where she was told there was oil in the coolant and the sensor had been compromised. The cooling system was flushed and cleaned and a new sensor installed. The "low coolant" light continued to come on. She took the car back in. She was told the wrong sensor had been installed. When she went back for the car the second time, she was told the oil in the coolant was preventing the new sensor from working and there was nothing more the garage could do. I went in and asked questions, primarily how serious was the condition, and couldn't get a straight answer.
We are due to drive to Florida in November. My wife would like to take it to a garage there. Is it save to drive it as is? What are the implications of oil mixing with coolant? What is causing it to happen?
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[URL] I even pulled the same P0170 code. And what I need to do before I spend a boatload of money and wind up sleeping in my car instead of driving it to work or lack therof is to start a troubleshooting list starting from where Sabot's update left off, i dont even know where the vacuum line is that he mentions and if i sprayed carb cleaner on it would i get a jump in engine RPM or a stall as a test?
What I have done: Cleaned MAF sensor, changed fuel filter.
What I have not done: Checked all vacuum lines, Tested fuel pressure, Tested for compression issues due to blown head gasket.
there is also a puffing noise coming from the exhaust side of the engine, im gonna grab a bottle of baby powder this afternoon and test for air leaks, i dont believe it is a misfire...
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I have a 2000 Buick Century with 212k miles on it. I would like to sell it. The problem is the transmission overdrive solenoid keeps getting stuck open. It's not a big deal once I get going 55mph or so. It's just that it's kinda "jerky" before getting up to that speed. Is this something that can be fixed by having the transmission system flushed or is it a problem of having to replace the transmission? How do I sell this car (even for dirt cheap) if I have to tell the interested persons that the transmission is going out???? Can I get a thousand bucks for it simply for the fact that it does run? I have been driving it until yesterday, fairly regularly.
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My 2000 Buick Century has both ends of the front sway bar broke partially at both ends-the bottom half of the flattened tubular terminal has cracked away. Would it be worthwhile to just have the cracks welded back together without removing the sway bar from the car, after removing the sway bar from the bushings and mounting bolt hardware?
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My 2000 Buick Century has an issue that whenever it rains really hard, after driving a while the ABS, Trac Off, and Service Vehicle Soon lights come on. I am assuming that part of the electrical connections are getting wet and causing the lights to come on. When there is no rain, obviously the lights don't come on. It's only done it one other time and it did it today. I was just curious what to do to fix it, before I jump into looking at all electrical connections which we all know can be hard to diagnose. By the way, the car has 64,000 miles on it if that makes any difference.
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I have a 2000 Buick Century. The wiper controls are all goofy. The delay seldom ever works, just goes into slow steady speed most of the time. And they go through several more cycles when wipers are shut off. No doubt some entire multifunction module will have to be replaced.
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