Hello all, my damn cel is still on with the same codes as before. The car stalls mainly when it is hotter out and wont start unless it sits for a couple of minutes. Last time it was stalling i replaced the TPS, MAP sensor, seafoamed the intake and i put in new plug wires. This seemed to fix the problem for like a month and i was getting like 6mpg better than before but it started stalling again when it got hotter out  . I took it to advance and codes p0123 came up it the scanner said TPS voltage too high. I forgot the other code but it said MAP sensor voltage too high. The last code was large evap leak, ive had this code on for about 4 years so that one doesnt matter. I am at a loss here because both the map and tps are brand new. Any ideas as to what can cause these codes again .

ecu could be bad, very bad. what year is the car?

I hate to leave a thread dead so i finaly fixed the problem. I took all of the ground wires and cleaned them all off and put dielectric grease on them, the one for the ecu, intake manny, and battery. After that the codes went away and it didnt stall on this humid 85 degree day.

Hey, that is excellent news!  And something for me to keep in mind as mine gets older and freakier...