hi,
i have a 91 sentra xe AT. My car has problems when i put it into drive. it starts to bog and shake when i'm holding the brake down. when i try to apply some gas it begins to move very slowly and it sounds like its gonna stall.. i just recently changed the spark plugs but then i put the old ones back thinking that would be the problem but it ain't. and just replaced the MAF sensor which i got from the local junkyard.. which helped a little bit..
also when the car is idling and warmed up.. the fan kicks in right in time but i here misfire from under the car where the cat is..
and i have no check engine light..
someone please help me..

i have a 91 sentra xe AT. My car has problems when i put it into drive. it starts to bog and shake when i'm holding the brake down. when i try to apply some gas it begins to move very slowly and it sounds like its gonna stall.. i just recently changed the spark plugs but then i put the old ones back thinking that would be the problem but it ain't. and just replaced the MAF sensor which i got from the local junkyard.. which helped a little bit..
also when the car is idling and warmed up.. the fan kicks in right in time but i here misfire from under the car where the cat is..
and i have no check engine light..
someone please help me..