Rough Idle with cat cams 708 on unmapped ecu

1. huggy54 Established Member Joined: Jan 2005 England Posts: 1744

   #1 23rd April 2010, 03:07

   Ok I just finished my VTS conversion and put catcams 708 in the car, the idle is fairly lumpy. if i dont keep my foot on the accelerator revving it sometimes the the engine feels like it wants to give up (lol) and sometimes does. is this normal behavior when you have unmapped ecu running these cams?
   
   dont know if this could be down to my lambda sensor was damaged and my new 1 isn't fitted yet or could it be the cams need timing up again, as when the cams were put in the engine i didnt have an ecu to start it
2. chris_rolling Frequent Poster Joined: Apr 2009 Chester Posts: 561 Saxo VTR, EP3 Type R

   #2 23rd April 2010, 04:13

   without a remap, yea the engine will sound like its struggling to idle. after remap, it will be better (and alot more power will be harnessed)
3. Olly Saxperience Forum Bum Joined: Dec 2008 Meerkat Harborough Posts: 2638 Saxo vtr mk 2

   #3 23rd April 2010, 06:56

   What were the cams timed too?
   
   Shouldnt be 'excessively' bad tbh....
4. huggy54 Established Member Joined: Jan 2005 England Posts: 1744

   #4 23rd April 2010, 08:51

   im not sure what the cams were timed to to be honest. what should they be timed to?also do think it could idle bad due to having no lamba sensor?
5. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #5 23rd April 2010, 08:59

   if the are at the standard marks it wil idle lumpy, and some time cut out.
6. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #6 23rd April 2010, 09:03

   Quote:

   Originally Posted by huggy54 im not sure what the cams were timed to to be honest. what should they be timed to?also do think it could idle bad due to having no lamba sensor?

   The car will need a lambda to try and correct the fuelling
7. user_12490 Established Member Joined: Nov 2006 Newcastle upon tyne Posts: 1753 161.5 bhp VTS and cammed 2 tone vtr.

   #7 23rd April 2010, 09:22

   my ph3 where very lumpy on idle. if you retard the timing 2 degree's on the inlet cam and standard mark on the exhaust cam it shouldnt idle as lumpy, thats what newman told me to do with mine and it worked. stops it cutting out as much too. just had my remap done on tuesday and my car wasnt running much more than standard before the map. running 161.5bhp now. my car is running without a lambda.
8. stupotvtr Saxperience Forum Bum Joined: Jul 2007 EDINBURGH Posts: 3143 BMW e36 328i sport

   #8 23rd April 2010, 09:23

   The ecu needs time to adjust and learn that the car has cams, mines was the same after my conversion. mines was fine after a few days of driving,also I noticed if you disconnect the battery for a while then reconnect it the car will go back to square one and will cut out till it learns the cams again. But also timing will have to be good.
9. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

   #9 23rd April 2010, 09:34

   just have to sort the timing out during mapping.
10. Aron Saxperience Forum Bum Joined: Feb 2007 Nuneaton Posts: 3554 EP3 Civic

    #10 23rd April 2010, 10:12

    you should be running a Lambda though.
    
    I take it you are going to get it remapped?
11. user_10176 Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)

    #11 23rd April 2010, 10:57

    yer without a lambda it wil not correct fueling! wil run just not rite. as it wil throw fuel to keep it going, as it think the a fault.w
12. huggy54 Established Member Joined: Jan 2005 England Posts: 1744

    #12 23rd April 2010, 12:24

    Lambda Sensor will be going on tomorow hopefully that'll make it idle a little better, as for my ECU I will put the predator on but I only got a the stabndard 16v basemap uploaded, gunna have to see if I can get a hold of Andy or anyone who knows how to upload other maps. As I do have other maps as well on my email and laptop at home.
    
    Wouldn't lie im a little suprised the Lambda could cause the car to not idle correctly as a few people say theres is fine with no Lambda
13. user_39821 Saxperience Forum Bum Joined: Dec 2009 Uckfield, East Sussex Posts: 3362 Citroen saxo 1.4 furio

    #13 23rd April 2010, 12:28

    Why would you want to run without a lambda anyway?
14. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #14 23rd April 2010, 12:33

    Quote:

    Originally Posted by huggy54 Lambda Sensor will be going on tomorow hopefully that'll make it idle a little better, as for my ECU I will put the predator on but I only got a the stabndard 16v basemap uploaded, gunna have to see if I can get a hold of Andy or anyone who knows how to upload other maps. As I do have other maps as well on my email and laptop at home. Wouldn't lie im a little suprised the Lambda could cause the car to not idle correctly as a few people say theres is fine with no Lambda

    lol, the lambda has a function - it's not just a metal stick shoved in the exhaust system.
    
    It's almost the only sensor that tells the engine if it's running right, and whether corrections are working or not.
15. huggy54 Established Member Joined: Jan 2005 England Posts: 1744

    #15 23rd April 2010, 13:04

    My lambda sensor got damaged, thats why its running without one right now, but I do have a new one but that is beign fitted tomorow
16. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

    #16 23rd April 2010, 13:42

    bad idle will be down to how its been timed up as said, i wouldnt drive a car or even run it without a lambda in, risking unecessary strains/wear or the engine components