Attempting mot again

1. Vtralex Regular Poster Joined: Jan 2010 High wycombe Posts: 435 Mk1 saxo vts

   #1 14th July 2010, 22:23

   Got my mot again tomorrow, they keep telling me they cant test the emissions as my car is idling to high, what is the requirement for them to be able to test emissions. It is now at about 1200?
2. saxo_singh Saxperience Forum Bum Joined: May 2009 Birmingham Posts: 4289 02 VTR'd Furio, 07 Audi A4 Avant S Line

   #2 15th July 2010, 00:06

   normal idle is about 700-900rpm, but 1200 is quite alot, you may want to check your idle control valve.
3. Vtralex Regular Poster Joined: Jan 2010 High wycombe Posts: 435 Mk1 saxo vts

   #3 15th July 2010, 14:51

   Tried cleaning it, made no difference, put on new one, still no difference. Same with throttle body and inlet manifold. No air leaks. It seems to idle lower when its cold then as it warms up gets higher?
4. user_43567 Regular Poster Joined: Apr 2010 Sumware u dnt Posts: 352 BLACK MK2 VTR

   #4 15th July 2010, 15:57

   they check for co n co2 emissions, it shouldnt matter what its ideling at as long as emmissions is below set amount, as well as fast idle at 2k, if emmissions are good it should be ok.
5. user_38198 Established Member Joined: Oct 2009 West Mids Posts: 1847 Peugeot 106 1.1

   #5 15th July 2010, 16:28

   You sure they are not testing it when the engine is cold? Cold start revs are about 1200rpm and when the engine warms up it goes to about 800.
   
   Ask them to test it at the earliest point when you drop it off so the engine will still be warm, unless there actually is a problem with the ICV etc.
6. Vtralex Regular Poster Joined: Jan 2010 High wycombe Posts: 435 Mk1 saxo vts

   #6 15th July 2010, 18:11

   Its failing the "natural idle test" And they insist that it must be idling at about 850rpm +/- 50rpm. They tested it first when the engine was still warm.
7. macky Infrequent Poster Joined: Aug 2007 uk Posts: 110 citroen saxo 1.1 mrk1

   #7 15th July 2010, 20:42

   sounds silly but have you cheaked your throttle cable is not too tight may be able to adjust it if so
8. user_43567 Regular Poster Joined: Apr 2010 Sumware u dnt Posts: 352 BLACK MK2 VTR

   #8 15th July 2010, 22:52

   Adjust cable mate. Any decent mot garage should wait untill car i warm before its connected and tested. U thought about takin elseware. Get a free second opinion
9. Vtralex Regular Poster Joined: Jan 2010 High wycombe Posts: 435 Mk1 saxo vts

   #9 16th July 2010, 01:24

   Throttle cable is fine mate. And it is warm when they are testing it, it idles higher when it is warm. About 1150 at cold and about 1300 when warm.