my car bogs pretty bad after warm-up. when i drive my car, it stutters and bogs when i step on the gas... mainly in lower rpms. anyone have any ideas on what they think it might be?

set-up:
b18b turbo w/ 141,000+ miles

current diagnosis:
-replaced spark plugs
-replaced cap and rotor
-replaced spark plug wires
-tested distirbutor
-tested map sensor
-replaced fuel filter
-tested internal coil
-tested fmu and missing link

 

my friends mr2 did that only when he would floor it....it turned out a hotter spark and a new distributor fixed the prob.....also i think the octane avail in cali wasnt enough

 

Did you check the igniter and the timing?

 

ignitor and timing is cool. already swapped distributors so i know it aint that.

 

check ur vacum<<<<<

 

If distributor OK, I am pretty sure about O2 sensor being *****d up....

 

Yeah, did you replace your O2 yet?

 

yup.. o2 sensor works fine.