Would start with simple/cheaper to more expensive fixes. Air cleaner, fuel filter, then map sensor. Other than that - fuel injectors.
You may want to check the motor mounts, it sounds like the engine is vibrating.
Around 4000 lbs
Around 4000-4200 lbs
3800-4000 lbs
how do you remove the fan clutch on a 1994 mazda b 4000 4.0
The 2003 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2008 Buick LaCrosse's engine produces 230 ft-lbs. @ 4000 rpm.
The 2004 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2006 Buick LaCrosse's engine produces 230 ft-lbs. @ 4000 rpm.
The 2002 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2007 Buick LaCrosse's engine produces 230 ft-lbs. @ 4000 rpm.
The 2001 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.