i myself is having exact problem... car turns over fine idles fine for bout 30sec to a minute and then starts to shake bad BUT my rpms stay steady bout 800... i checked maf, changed o2 sensor, changed injectors and nothing still doing same thing... in my car wen i pull plug number 4 it does only a little difference.. wen i rev or gas car to drive off it bogs a bit between 2k to 2.5k and then its all fine drives perfect... now i recently noticed i have two plugs not connected here are the pics....
Attachment 19897 in this picture it has no where to connect
Attachment 19898 and this pic the plug on da motor is cracked so i cant plug it in..
now can someone tell me what these plugs go to and their purpose ??? i would appreciate it