car bucks 1st few miles.....

[brelandt]

OK, here is my problem.....

Car sits overnight (12 hours). Start engine put it into gear and drive away. No problems at all.

Get to work after a 20 mile drive around 6:45 am. Leave for lunch at noon. Car bucks and jerks for about 3 miles. Even after the engine temp has hit the mid mark. Goes away.

Leave lunch 45 minutes later. Same thing but not as bad and for not as far.

Leave work at 5pm and same thing again. Jerks and bucks then goes away.

Again. Leave for work in morning and engine runs fine.

Has been doing this for about 2 weeks not. Does not matter what the outside temps or if it's sunny or raining.

Things that have been done to the engine within the last 6 months.

new plugs, wire, cap rotor, fuel system o-rings, all hoses both coolant and emissions (ALL OF THEM!) water pump, air filter and full oil and fuel system cleaned with seafoam.

I regapped and installed my old plugs and double checked the wires and cap. still jerks.

Could it be the O2, fuel filter or EGR?

Car runs fine afterwards and still getting great gas mileage.

Thanks everyone. I know it's a long post but wanted to be as complete as possible.

P.S. I wired in a tach about a month ago. 2 weeks prior to this problem occuring. Double checked my connections for loose wire to ignitor. Seems fine to me. Still tight and no corrosion.