MAP sensor quickie

1. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #1 30th July 2010, 12:11

   Seems like my MAP sensor does nothing when i unplug it. its the same as when its plugged in - is the sensor buggered?
2. user_10473 Saxperience Forum Bum Joined: Jun 2006 Swansea Posts: 4946 Bianca White Peugeot 106 S2 Rallye, Saxo VTS

   #2 30th July 2010, 12:16

   They only take readings at certain times, so unlikely it will make any difference when unplugged whilst sat idling.
3. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

   #3 30th July 2010, 12:22

   Quote:

   Originally Posted by Mr_P They only take readings at certain times, so unlikely it will make any difference when unplugged whilst sat idling.

   at certain times? think it could be causing my flatspot because at low down revs the engine only bogs down after about 15-25 mins of driving?
4. user_10473 Saxperience Forum Bum Joined: Jun 2006 Swansea Posts: 4946 Bianca White Peugeot 106 S2 Rallye, Saxo VTS

   #4 30th July 2010, 12:24

   When the car is started, at high engine speeds, at varying engine speeds.etc. etc. It doesn't constantly read the pressure.
5. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #5 30th July 2010, 13:29

   If the engine doesn't change when it's unplugged I'd say it's buggered
6. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #6 30th July 2010, 13:31

   How does the engine run when it's plugged in?
7. user_36547 Infrequent Poster Joined: Aug 2009 taunton Posts: 147 saxo vts turbo

   #7 30th July 2010, 13:54

   Or the ecu could of seen the fault and reverted to a known value of that sensor not all ecus put the fault light on best get it pluged in and that will tell u for sure
8. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #8 30th July 2010, 14:04

   when you unplug it the engine should hunt around a lot in my experience
9. user_36547 Infrequent Poster Joined: Aug 2009 taunton Posts: 147 saxo vts turbo

   #9 30th July 2010, 14:10

   I second that check the wireing its a common thing
10. user_40784 Saxperience Forum Bum Joined: Jan 2010 London Posts: 2768

    #10 30th July 2010, 15:37

    Quote:

    Originally Posted by raunchz How does the engine run when it's plugged in?

    It was only on idle when the map sensor was unplugged and it made absoloutely no difference at standstill. Not too sure if this is the cause of my flatspot?
    
    

    Quote:

    Originally Posted by raunchz when you unplug it the engine should hunt around a lot in my experience

    mine doesnt hunt with it unplugged when idling.
11. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #11 30th July 2010, 15:40

    I'd look to test the wiring and maybe borrow a MAP sensor that you know is 100% working to see if anything changes with how the car feels