a couple days ago i posted about my problems with my new code reader, well it still doesnt work so i broke out the old beeper reader. i got code 128-map vaccume hose loose or damaged, i visualy inspected it and seemed good so i put a little bit of vassalene on it and put it back on and i still am getting the code for it, shoud i just replace it? 542 and 546- furl pump circut open and circut relay problem. the fuel pump has a toggle switch hooked up to it to break the circut,,, could this cause the code? code 121-tps voltage to high or low, 327&328-egr to low, 624 epc circut failure, are codes i have no clue how to fix. just repace the sensors???? any help would be aperciated.