Judders at low revs.

1. user_28590 Infrequent Poster Joined: Nov 2008 Cornwall Posts: 219 Saxo Exclusive 1.4i

   #1 6th September 2012, 08:46

   Hey all, I've been having problems with my car. This problem has been going on and off for the past 6 months, sometimes it stalls when it's on idle and keep dropping under 1k rev, it's not the ICV as i've had a new one put in. Also when i'm driving and I stop on the throttle, there is no power between 2-4k rev and the car feels like it's going to stall and judders. The exhaust is also like popping. I've found a temporary fix to this over the past 6 months was to unplug the ECU for 1 min then plug it back in. It's gone worse over these few days! PLease help
2. jasonmayall Established Member Joined: Mar 2011 Birmingham Posts: 2148 Rover BRM, Rover 800 Coupe, Mk6 golf.

   #2 6th September 2012, 08:57

   Sounds to me like it could be Lambda sensor

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3. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #3 6th September 2012, 09:10

   MAP sensor would cause the 2-4k hesitant acceleration..
   
   Also when your idle goes funny try this to reset the ICV -
   
   Turn key 2-3 7 times then start.. so 2-3 2-3 2-3 2-3 2-3 2-3 2-3 start.. trust me it works.

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4. user_28590 Infrequent Poster Joined: Nov 2008 Cornwall Posts: 219 Saxo Exclusive 1.4i

   #4 6th September 2012, 09:12

   Quote:

   Originally Posted by saxova MAP sensor would cause the 2-4k hesitant acceleration.. Also when your idle goes funny try this to reset the ICV - Turn key 2-3 7 times then start.. so 2-3 2-3 2-3 2-3 2-3 2-3 2-3 start.. trust me it works.

   But I thought when I turn it three times the car would start?
   
   THanks!
5. e8_pqck Saxperience Forum Bum Joined: Aug 2010 Midlands Posts: 2530 AX 16v Turbo

   #5 6th September 2012, 09:17

   When you turn the key the stepper motor on the icv will cycle, so pause for a few seconds, if you listen you might be able to hear it. Just turn the key to the position before start.
   
   On my old car I had to pause a few seconds while the icv cycled, then start the car else it would hunt for the tickover level.

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6. user_28590 Infrequent Poster Joined: Nov 2008 Cornwall Posts: 219 Saxo Exclusive 1.4i

   #6 6th September 2012, 09:18

   Thanks, i'll try it out!