HELP!!!! Car doesnt want to go when engines hot.

1. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

   #1 17th January 2014, 18:37

   Hello, I have a saxo mk1 1.4i WSX
   
   I've changed:
   spark plugs,
   coil pack,
   ht leads,
   crank sensor,
   fuel filter
   and air filter.
   
   The problem is that when I put my foot flat on the accelerator and it goes up to 6000 revs and then dies. And when I'm driving normal it lasts until the engines hot and then it starts juddering and eventually dies. I've unplugged the MAP sensor which makes it stop dying as often but not that much .
   Anyone that has any ideas please let me know ASAP.
   Thank You
2. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #2 17th January 2014, 18:40

   Are you serious mate a 6k revs 1.4 Saxo?
3. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #3 17th January 2014, 18:41

   Prob sucking in rust from the inner wing mate
4. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

   #4 17th January 2014, 18:44

   Quote:

   Originally Posted by Cam Prob sucking in rust from the inner wing mate

   From the inner wing? Its a standard air box if that's what you mean
5. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

   #5 17th January 2014, 18:45

   Quote:

   Originally Posted by stevo67 Are you serious mate a 6k revs 1.4 Saxo?

   I think it red lines in 7k and 8k revs
6. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #6 17th January 2014, 20:44

   Quote:

   Originally Posted by KyleDanZz I think it red lines in 7k and 8k revs

   Are you sure you've got a rev counter fitted & not a clock saying 8pm?
7. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

   #7 17th January 2014, 21:07

   Ill check tomorrow mate. I've took my battery off to try reset the ECU see if that helps
8. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

   #8 18th January 2014, 18:34

   Just check. It goes up to 8k revs. I tightened the spark plugs because the garage only done them finger tight and cleaned the lamba sensor still no joy. Any Ideas?
9. chompy Established Member Joined: Jan 2008 Scotland Posts: 1764 Because racecar

   #9 18th January 2014, 19:32

   8k? That must be one serious engine! If it revs to 8k and it's not running when warm you'll maybe want to look at your map and make sure the fueling is right for the temperature and isn't stuck running on the cold map
10. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #10 18th January 2014, 23:26

    Well when I unplug the map sensor it runs abit better but still dies when it gets hot
11. chompy Established Member Joined: Jan 2008 Scotland Posts: 1764 Because racecar

    #11 18th January 2014, 23:50

    That's because the ecu isn't giving the same air/fuel ratio when it's unplugged. What ecu are you running?
12. Boyes Regular Poster Joined: Apr 2008 Sheffield Posts: 276 Peugeot 106 GTi, Clio 172

    #12 19th January 2014, 09:44

    Measure the resistance from the coolant temp sensor when warm, this might be faulty. Does it smell like it's over fuelling?
13. French4ever Banned Joined: Jan 2014 Posts: 132

    #13 19th January 2014, 10:48

    I would be looking at the temp sensor as when the engine is cold more fuel goes in and then when the engine is warm your temp sensor will be telling the ecu that it's still cold do will still be putting more fuel in hence if you can smell fuel in the cab it will be over fuelling. Worth checking
14. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #14 19th January 2014, 11:59

    I've changed the some temp sensor Think its the one you are on about. I changed the one on the gearbox side of the engine. It has a green plug.
15. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #15 19th January 2014, 12:02

    Just tried cleaning the fuel pump. Now I feel high Just dunno what todo now
16. chompy Established Member Joined: Jan 2008 Scotland Posts: 1764 Because racecar

    #16 19th January 2014, 12:12

    What ecu is it? Take it to the place you got it mapped and ask them to have a look
17. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #17 19th January 2014, 12:22

    I never had it mapped
18. chompy Established Member Joined: Jan 2008 Scotland Posts: 1764 Because racecar

    #18 19th January 2014, 12:23

    But it must have been to run to 8k :s did the previous owner have it mapped?
19. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #19 19th January 2014, 12:27

    Umm I dont know I think the revs bounce at 7k when it decides too get that high
20. French4ever Banned Joined: Jan 2014 Posts: 132

    #20 19th January 2014, 12:57

    Can't you speak to previous owner see if they had the standard ecu mapped?
    Does the car have aftermarket cams or any performance parts, if not can't see why it would have been mapped.
21. KyleDanZz L-plater Joined: Aug 2013 Posts: 46

    #21 19th January 2014, 17:58

    I have found a temporary fix . So for anyone having this problem, take out the fuel pump and clean the bottom part that I think is some sort of filter but I am gunna have to buy a new one. But its running fine for the moment. Fingers crossed
22. French4ever Banned Joined: Jan 2014 Posts: 132

    #22 19th January 2014, 18:26

    Fingers crossed for you lol could be a cheap fix