rough idle, revs bounce and sometimes cuts out :(

1. user_36974 Frequent Poster Joined: Aug 2009 Manchester Posts: 570 Mercury Grey VT?

   #1 16th August 2010, 16:36

   anyone know what could cause this ? replaced ICV and made no difference.
2. user_28067 Established Member Joined: Oct 2008 Corby, Northants Posts: 1264 Clio 197 and a clio 172 atm

   #2 16th August 2010, 17:00

   have you tried cleaning the EGR valve?
   
   I had this problem with my astra
3. stedixon Infrequent Poster Joined: Nov 2008 middlesbrough Posts: 146 saxo (gti) ;) berlingo ford fiesta savo vtr

   #3 16th August 2010, 20:12

   i had that problem and it was my loom had melted in the harnes duno y does it rev up and down a little then just go dead wen you take foot off throttle and put clutch down
4. user_36974 Frequent Poster Joined: Aug 2009 Manchester Posts: 570 Mercury Grey VT?

   #4 16th August 2010, 20:33

   the revs bounce that low sometimes it drops too much to keep turning over. only does it now and then. cleaned all the sensors and valves.
5. stedixon Infrequent Poster Joined: Nov 2008 middlesbrough Posts: 146 saxo (gti) ;) berlingo ford fiesta savo vtr

   #5 16th August 2010, 20:41

   sounds like your not getting enough air into the engine
6. Lewis Saxperience Forum Bum Joined: Oct 2009 Middlesbrough/Coventry Posts: 3808 Megane 225

   #6 16th August 2010, 21:49

   Does it do it after the engine temperature starts to climb? If so bleeding the coolant system can fix it
7. user_36974 Frequent Poster Joined: Aug 2009 Manchester Posts: 570 Mercury Grey VT?

   #7 17th August 2010, 00:06

   coolant system is bled but must admit it does it once its warmed up. and stedixon your comment has just made me think. i got the sax with a filter on. it only does it once stationary which points to hot/not enough air to the filter i spose
8. Lukeyj01 Newbie Joined: Jun 2010 Posts: 5

   #8 20th August 2010, 12:34

   hi i got this same problem.. whats a EGR and a ICV valve and where can i find it?
9. lowza Newbie Joined: Jul 2010 gloustershire Posts: 7 Present - saxo VTR mk2 previous- 306 1.9 td

   #9 26th August 2010, 09:55

   The EGR is an Exhaust Gas Recirculation valve ans should be located just to the left of the exhaust manifold. The IDV is an Idle Control Valve and is located on the far left side of your intake plenum.
   
   I have also got this problem, ive cleaned sensors and ICV and i have the standard air filter system still fitted. can someone help and tell me if the internals of the IDV should rotate like its threaded? and if so where should it be set to fully in, fully out or in between, if not i guess i need a new valve
10. vtr_chris90 Established Member Joined: Jun 2008 nuneaton Posts: 1796 LY R26

    #10 26th August 2010, 16:13

    Could be the tps sensor or map sensor tbh mate I you've changed the icv already
    
    But I'd say get some diagnostics on the car and get the ecu read, rather than trial and error, cause you could change the tps and map sensor and it may not be them, so can save alot of time, effort and money