My guess is the SES is multiple misfires.

Two other instances I've witnessed was a dirty EGR valve and a security system going haywire, thus interferring with the fuel pump. In both instances, the problem was intermittent. The EGR case had a roughness at an idle only. Cleaning the EGR valve solved it. The security system case first occured only when at low RPMs (such as going up a hill) and eventually began to occur at an idle too. Finally, the car wouldn't even start. We put in a resistor to override the VATS system - problem solved.

mine is CPS

Thats what I was trying to get him to do is unlock the TCC and see if the chuggle went away. The brake switch signal goes to the pcm then to the TCC solenoid to lock-up TC. If the chuggle would of went away then it would be the TC or the TCC.

But now the symptom'* have changed and it sounds ign related. Get the code checked and let us know from there.

Sorry to hop in the fun this late.

Please go look under the hood. Do the plug wires say Packard and have numbers 1-6 on them?

(I'm betting they do, if so replace the orignal spark plug wires)

If the wires do say Packard.. wait til the car is very cold.. as in sitting for a couple hours. Lift hood, start engine..spray liberally with full stream of hose water..all over the plug wires. If the motor reacts severly...it'* ignition related. Usually plug wires.

Went to the store today got a odb2 code reader and am getting a p0134 code which means o2 sensor circuit no activity detected.Looks like either the o2 sensor is a piece of junk or something is frying out my o2 sensors.I am starting to wonder if it is the cat conveter??

But I doubt it,I am thinking I just a junk o2 sensor but who knows cause I put in the old o2 sensor, I cleared the computer and monitored it for a drive and sure enough same code came up again but no ses light goes off so I am pretty sure that all along my problem was either the o2 or the cat but I doubt the cat is bad I am more than sure its the o2 sensor.I am going to try another make of o2 sensor and see if the problem goes away if not back to the stealership.

Hey hey I thought I would go to the parts store web address to look up and see if the store gave me the right o2 sensor and guess what.....the store gave me the right box with the wrong o2 sensor inside the boxes part number was corredt for the upstream o2 sensor and there was a downstream sensor inside that I installed hmmmm wonder why I got a ses light to come on after installing the damn wrong sensor.

Man what a headache I cant wait to go to the parts store in the morning and try to make them understand that some how in the manufacures factory they packed the downstream o2 sensor into a upstream sensors box.

Along the same line of thinking as mike_peperni...keep it simple first...
How'* the transmission fluid level? Air filter clean? I'm assuming someone checked these, but don't want to assume anything.

Someone else'* Pontiac had these same symptoms (albeit 15+ years older) and it ran like a champ after fixing a vacuum leak. The maintenance manual shows a vacuum hose down at the MAP sensor. I'm not too up on vacuum connections in a Bonneville though.

Wish I could help more...especially for a chef.

I know I'm getting late but...My 02 SE is doing the exact same thing. My problem started after I did a tune up. Plugs, Wires, fuel filter.

I have heard others speak of this problem and the clogged cat that Rogue mentioned was named.

Mine started about a month or two after the tune-up.

my wife'* uncle is an ASE mech. And when I told him about it he said maybe plugs and wires were needed. This problem is annoying to me too.

I'm hoping we can find something out.

I'll keeps tabs on it and if I find anything out I'll post.

Tim