lumpy idle/sticking revs??

1. slow-norris Regular Poster Joined: Aug 2011 birmingham Posts: 368 SAXO VTR

   #1 5th August 2011, 21:11

   hello all, ive got couple of problems with my vtr 1st is lumpy idle (needle barely moves) 2nd is when its cold the revs stick between 1500 - 2000 but only when its cold once its warms up its drives fine?? i took off the stepper and the map sensor today and cleaned them also put the diag on at work and there's no fault codes.. just wondered if any1 had any idea's what else i could try before i have to start guessing and buying parts??
   
   cheers in advance
   
   mike
2. kuli280 Infrequent Poster Joined: Sep 2010 Heathrow Posts: 172 1999 Saxo VTR, 1983 Mercedes 250 LWB Lowrider.

   #2 5th August 2011, 21:15

   Take the plug off the coolant temp sensor when it's cold, then start it to see how it revs.

   1 user thanked this post: slow-norris
3. slow-norris Regular Poster Joined: Aug 2011 birmingham Posts: 368 SAXO VTR

   #3 5th August 2011, 21:19

   Quote:

   Originally Posted by kuli280 Take the plug off the coolant temp sensor when it's cold, then start it to see how it revs.

   could the temp sensor cause these problems then??
4. kuli280 Infrequent Poster Joined: Sep 2010 Heathrow Posts: 172 1999 Saxo VTR, 1983 Mercedes 250 LWB Lowrider.

   #4 5th August 2011, 21:23

   Mines was revving itself & not always starting when hot & it cured the problem for me.
5. Ben_SaxoForte Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project

   #5 6th August 2011, 01:56

   mine was sticking revs around 2k but only when hot, was map sensor. can be alot of different things though, good luck lol

   1 user thanked this post: slow-norris
6. slow-norris Regular Poster Joined: Aug 2011 birmingham Posts: 368 SAXO VTR

   #6 6th August 2011, 09:33

   well sice cleaning the stepper and the map sensor my lumpy idle has almost completely stopped and my sticky revs have lessoned so its looking to be 1 of them 2 thats the culprit :-)