Question about 1997 Pontiac Bonneville

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Pontiac lockup converter

My 97 bonneville's lock up converter make the vehicle seems to be trying to lockup but disengages causing a chugging action of the vehicle....i took this vehicle to a gm dealer in east tn as i was told this vehicel came here from up north and it has to have a chuggle program installed....they supposedly installed it but the vehicle still there anything that can be done to solve this issue???

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A GM dealer should be able to reflash the PCM to help alleviate the chugging.To a certain extent,it is normal,and you might want to consider tuneup things like plugs and wires,air and fuel filter,and also have all the engine and transmssion mounts checked for weakness,as weak mounts will magnify these types of problems.

Posted on Jul 09, 2008


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What other makes and models are interchangeable with the fuel sending unit for 1999 Pontiac Bonneville?

call or notify a bone/junk yard they have the cross reference charts for vehicle parts or try a gm dealer these are a few that are compatible 97-99 Pontiac Bonneville SE 6Cyl 3.8L 231CID VIN K Fit Note Engine VIN: K, Naturally Aspirated 97-99 Pontiac Bonneville SSE 6Cyl 3.8L 231CID VIN K Fit Note Engine VIN: K, Naturally Aspirated 98-99 Buick LeSabre ALL ALL 97 Buick LeSabre ALL ALL Fit Note With Harness Codes: HEN, HER 97-99 Oldsmobile 88 ALL ALL 97-99 Oldsmobile LSS ALL ALL Fit Note Engine VIN: K, Naturally Aspirated 97-98 Oldsmobile Regency ALL ALL

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1 Answer

I have an 01 Mustang v6 automatic with about 125k mileage. About 3 days ago I started experiencing a very hard chugging even though I have a full tank of gas and engine oil and coolant have just been...

Fuel or spark issues can cause this . Transmission lockup clutch can make a chugging sensation . When in overdrive lightly touch the brake while keeping a steady throttle and see if the chugging stops . Post back .

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1 Answer

Car is chugging a little bit at 45mph

The first thing that comes to my mind is "45 MPH"... and let me explain why.....

Your engine you said is running GREAT so a MPH is not going to effect the running of the Car but what happens @ 45 MPH you ask?

Your Torque Converter goes into Lock up.... If the Torque Converter is slipping in and out of lock up, you are going to have an irregular pulsating of the engine playing catch up.

you need to do this, try and drive the vehicle (you did not say what kind of vehicle it is), and drive it without the OVERDRIVE On...

So drive it and see if it is RPM RELATED. If there is no CHUG and you can go all the way to 55-60 without issue, Slow down below 45 and put the OD IN and accellerate and see what happens..

Is the Problem SPEED RELATED? Is it RPM Related?

If it does not happen with it OUT of OD, then what you probably have is a Torque Converter Failing...

I hope this helps

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Car chugs and jerks like crazy while cruising

Determine whether the jerking is engine or transmission related. One way to determine if it is the transmission lock up converter is acting erratically is to down shift out of OD. And see if jerking persist. If it goes away suspect transmission to have problems with torque converter or TCC solenoid . If it doesn't go away determine whether or not the engine sounds to be misfiring. If so vehicle may require a tune up. Many vehicles can be diagnosed for free at your local Auto Zone.

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I do not know much about this vehicle but if it is diesel it sounds like you should clean and or replace air filter and or glow plugs or grid heater... if it is a gas vehicle changing the fuel filter and checking spark plug gaps and plugs and wires also the cap and rotor may have where witch will cause intermittent and weak spark so you could be getting to much fuel and running rich. also if it has a catalytic converter you may want to check if it is partially clogged and if it is have it replaced hope this helps good luck

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1 Answer

1997 pontiac bonneville lock up converter

if you converter is blocked up or clogged take it to s hop and have them cut it off and put in a new one...... with a clogged doncverter it will act like it is the transmision when it is not.... i just went through this with my suburban

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My 1995 buick lesabre doesnt seem to downshift

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