P1400 Code- Help!!!!!

[dsmcrazy]

HEY GUYZ, HERE'S MY PROBLEM. WHEN I FIRST START MY CAR, IT RUNS CRAPPY. IT WILL DROP DOWN A LOT AND SEEMS LIKE IT'S GOING TO DIE OUT. ONCE THE CAR WARMS UP, THEN IT SEEMS TO BE RUNNING FINE. OCCASIONALLY, I WILL GET A CHECK ENGINE LIGHT, AND WHEN I GO TO SCAN IT, IT SHOWS CODE P1400, WHICH STAND FOR MANIFOLD ABSOLUTE PRESSURE SENSOR MALFUNCTION. THE OTHER PROBLEM I HAVE IS THAT IF I BOOST IT AND THEN COME TO A STOP, THE RPM WILL DROP DOWN REAL LOW FOR COUPLE SECONDS, AND THEN GOES BACK UP TO ITS NORMAL RPM. I REPLACED THE MAP SENSOR WITH ONE OF MY FRIEND'S AND IT WAS STILL DOING THE SAME THING. I WAS WONDERING IF ANYONE ELSE OUT THERE HAS EXPERIENCED THE SAME PROBLEM, AND IF YES, PLEASE HELP.

THANKS

 

[doodlem]

What kind of Car do you have. That is needed

Here is what a have from a 97 Talon TSI AWD

http://doodlem.dns2go.com/cars/map_p1400.htm

Need more info just ask. Try a smoke machine on the intake to find if you have an intake leak, I had a small leak from the Map sensor i replaced the o-ring and/or (i dont remember) I added an o-ring where the MAP sensor sits and it seems to work fine.

Info from Mitchell OnDemand5

 

[talon1979]

This may sound fishy to a few people, but call autozone and have them look in their OBDII book to see what the usual fixes are for the P1400 code.