Auto Parts: 1999 olds alero, obd 2 scan tool, olds alero

Question
QUESTION: I was driving my car when all of a sudden it started to run rough i took it to get it scaned and it showed to be a map-baro sensor replaced it and it ran the same got it scanned again and it showed low circut input what does that mean my car is a 2.4L engine your answer would help soo much please help
         Thanks
         Melissa

ANSWER:      That's just not enough info for me to tell you anything.  I will tell you that just getting it scanned by the Jiffy-lube isn't going to cut it.  Find a good, reliable independent garage and have them do a complete real-time look at the engine systems.  They'll find the problem.  If you could send me the codes you were getting, I might be able to offer some insight, but it's no substitute for real-time scanning of the system.

---------- FOLLOW-UP ----------

QUESTION: The code it's putting out is p.o.108 map-baro and high circuit input ran engine on data shows 26.5 on map scensor engine running rich codes are off a matco global obd 2 scan tool

Answer
    If you replaced the MAP sensor, and you are still getting this code, then it's one of two things.  Either the wiring is bad (probably the plug, if it is) or the ECM is bad.  This is where you throw away that scan tool and get a pro to hook it up to his two thousand dollar real-time scanner.  A real-time scanner can actually measure the values being reported to the ECM and determine if they are in range.  It can also test the ECM itself.  There really isn't much more that you can do at this stage; it's a good bet to replace the part that the cheap scanner says is bad, but after that you'd just be guessing and some of the parts are kinda pricey.  Good luck.