Question about 2000 Buick LeSabre

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Had a tuneup and had the transmission cleaned , but the car bucks like a slip when we are driving mostly on the highway.

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Its time you took it back as i think you have a plug miss firing new plugs should sort it out

Posted on Nov 15, 2009


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When accelerating from 60-70, it is jerking o r bucking

all cars do that, called misfire , all do it never tuned up.!
what mileage on that engine, from last tuneup.? and total miles
100k,? what?
if that is engine buck and not transmissions slip or unexpected shifts.
then that is called MISFIRE<
and #1 cause, is bad spark plugs.(warn out as ALL DO)
there are 49 more causes, but most times not on newer cars.

ever get that car serviced, ?
all cars buck ignored, all. for 100 year in a row. (gas)
if the spark is good.
we use a scan tool and watch for DTCs during the buck.
the Scan tool will tell you , if the ASD relay drops causing said buck and why.
there is no other ways... to fix, not bad spark plug bucking
takes tools.

I have 2010, same engine, in my priv garage. (Grand Cher)
and its got fresh spark plugs in it.
the are not easy to change out. ask.
has COPs in the way. and more...

use the best spark plugs you can find, to make them last longer and not have to pull those cops too often.
also the cops have boots that can carbon foul.
but the service shop knows all this stuff. let them>?

Nov 23, 2015 | 2012 Jeep Liberty Sport 4dr SUV 3.7L V6...

1 Answer

2004 ford freestar van starts bucking at 50mph plus?just had tuneup plugs,plugwires fuel& airfilter,new coilpack?

I may be wrong but I had a 2001 Freestar that developed a leaky front seal in the transmission. There was no way for the transmission fluid to leak out on the ground so I didn't find out until it was too late. 4th, (overdrive) gear began to slip leading to a "bucking" sensation between 45 and 50 mph after it shifts in.
I hope I'm wrong because I was told it was a $2,500.00 job. Good luck, Jeff M.

Oct 19, 2014 | 2004 Ford Freestar

1 Answer

Transmission slip mainly at highway speeds

This does not sound good. It is possibly your O/D direct clutch or O/D brake slipping in the transmission. Seek a couple of specialist opinions.

Jan 13, 2013 | 1997 Toyota Camry

1 Answer

96 mercury grand marquis bucking

try tuneup and fuel filter first would be my suggestion.

Aug 19, 2012 | 1996 Mercury Grand Marquis

2 Answers

While on vacation, our 2002 six cylinder automatic started acting up. With the gas pedal depressed for normal driving, the car started to "modulate" (the rpms would drop and race back up...

check to make sure airfilter is ok and maf sensor is clean. then check out tps ( throttle position sensor ), here are a few causes of a bad tps sensor--- transmission shift issues, bucking, jerking, idle surging, engine cutoff, hesitation on takeoff, surge while cruising down highway. if light on dash is on get it scanned to find problem code. most auto parts stores will do this for free. auto-zone etc. here are a few symtoms of a bad maf sensor-- surge, slip condition underload. the mass air flow sensor may be degraded or contaminated. stalling, misfiring, poor acceleration. ( a check engine light may not come on ). a lot of times just by cleaning maf sensor cures the problem. GOOD-LUCK!

May 08, 2011 | 2002 Hyundai Santa Fe

1 Answer

I have a 1995 Buick Lesabre and after alot of driving, when I come to a stop and have to accelerate, my car starts bucking, the same goes while highway driving, trying to pass another car, my car will...

Change the Filter and Fluid in the Transmission and see if this helps. If it doesn't then you will need to have the transmission serviced at a shop.

Jul 11, 2010 | Buick LeSabre Cars & Trucks

1 Answer

Transmission slips and reverse stopped working

you need your transmission rebuilt the clutches are slipping

Sep 28, 2009 | 2002 Chevrolet Tahoe

1 Answer

Transmission slips when hot

its either low on fluid or the clutches & bands are worn or need adjusting!
get itserviced QUICK SMART! & check for leaks!

Jul 20, 2009 | 2004 Volvo S60

1 Answer

Hesitation, misfire or "bucking" feeling

you most likely have a coil pack going bad.
This can cause an electrical spike and cause computers to reboot just like your home PC in and electrical storm,that is why the transmission acts as if it does not know which gear to go in.
You need to have someone hook up a scan tool and retrieve the trouble codes and see if there is a miss-fire code stored in memory.

Apr 03, 2009 | 2003 Lincoln LS

1 Answer

Transmission Component Slipping (TCC Stuck off)

code p 1870 refers to transmission component slipping
That can be from dirty oil or a clutch pack or band slipping or low oil pump pressure in the transmission
you say that it occurs on highway driving after 2 hours and that slipping will add friction heat to the transmission oil bringing on the oil temp light
take it to an accredited transmission professional service center that works on your make of vehicle , have the oil changed which require the pan removal
at the same time that will allow the adjustments to be done
when reassembled and refilled , have a pump pressure test done

Apr 16, 2017 | 2002 Isuzu Axiom

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