swapped everything

1. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #1 13th June 2012, 21:00

   Hi, I have been reading all those similar problems, but not one like mine, Here is my short story; bought my 1999 SAXO VTS 2 weeks ago, was running OK, but not great, would sometimes feel like running on 3 cylinders in idle after a hard drive. So after reading through the forum, I thought I could cure the problem, so I replaced the lambda sensor, coilpack, IAT sensor, MAP sensor and the green water temp. sensor yesterday, then reset the ECU, now when starting from cold it pulls well, doesnt have that hole between 3-5K RPM it had before. But once it gets warm, it will idle very rough and will stall. I am not sure what I've done wrong. But the small issue I had is now a serious problem. Any clues on what could have gone wrong? and why it would run fine from cold, then so bad when warm?
   
   any help apreciated
   cheers
2. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #2 13th June 2012, 21:01

   have you checked the engine bay fuses?
3. SaxoVTRben Frequent Poster Joined: Aug 2011 nr bognor regis ,west sussex Posts: 787 saxo 16v JP4

   #3 13th June 2012, 21:16

   i have this problem, and still have so be interested to know. I can only personally put it down to being a crap engine for me, hence why a new lower mileage jp4 is going in. May run well for others or for previous owner but for me just has been problematic.
4. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #4 13th June 2012, 21:17

   Quote:

   Originally Posted by BertieG have you checked the engine bay fuses?

   Anthing specific to look for?
   
   BTW, I also replaced the plugs and fuel filter last week
5. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #5 13th June 2012, 21:22

   Quote:

   Originally Posted by SaxoVTRben i have this problem, and still have so be interested to know. I can only personally put it down to being a crap engine for me, hence why a new lower mileage jp4 is going in. May run well for others or for previous owner but for me just has been problematic.

   I really think it is the engine management, not the engine itself
6. craig180p Yorkshire Joined: Dec 2005 West Yorkshire Posts: 31079 1989 Golf GTi Clipper

   #6 13th June 2012, 21:22

   If you've already done the coil pack I would suggest chsnging the battery.
   
   Also worth changing the ICV and cleaning the throttle body out
7. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #7 13th June 2012, 21:28

   Quote:

   Originally Posted by saxo180 If you've already done the coil pack I would suggest chsnging the battery. Also worth changing the ICV and cleaning the throttle body out

   I will try the battery, and will clean the throttle body, but the ICV is only responsible for the idle speed, correct? It does act up through while driving after it got hot, hesitation and rough pulling.
8. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #8 13th June 2012, 21:46

   Are there any other sensors, and is it really the green sensor in the thermostat housing and not the blue that delivers the signal to the ECU?
9. porschedriver Newbie Joined: Jun 2012 Posts: 18

   #9 14th June 2012, 08:55

   Put the old coilpack in and saw the lambda sensor plug was loose, now it runs fine again, does not pull as hard as before but it could be because the lambda sensor was not leaning the mixture.
   
   thanks for all the help