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23rd April 2010, 03:07
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#1
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Established Member
Join Date: Jan 2005
Location: England
Posts: 1,744
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Rough Idle with cat cams 708 on unmapped ecu
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
Last edited by huggy54; 23rd April 2010 at 03:14.
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23rd April 2010, 04:13
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#2
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Frequent Poster
Join Date: Apr 2009
Location: Chester
Posts: 561
Car(s): Saxo VTR, EP3 Type R
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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)
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23rd April 2010, 06:56
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#3
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Saxperience Forum Bum
Join Date: Dec 2008
Location: Meerkat Harborough
Posts: 2,638
Car(s): Saxo vtr mk 2
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What were the cams timed too?
Shouldnt be 'excessively' bad tbh....
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23rd April 2010, 08:51
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#4
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Established Member
Join Date: Jan 2005
Location: England
Posts: 1,744
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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?
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23rd April 2010, 08:59
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#5
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Saxperience Post Whore
Join Date: Jun 2006
Location: Ramsey st marys, peterborough
Posts: 8,288
Car(s): Saxo's, Corsa (Daily)
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if the are at the standard marks it wil idle lumpy, and some time cut out.
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23rd April 2010, 09:03
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#6
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Saxperience Addict
Join Date: Jul 2005
Location: Solihull / Bournemouth
Posts: 14,233
Car(s): 2015 Lapiz Blue Golf R
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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?
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The car will need a lambda to try and correct the fuelling
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23rd April 2010, 09:22
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#7
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Established Member
Join Date: Nov 2006
Location: Newcastle upon tyne
Posts: 1,753
Car(s): 161.5 bhp VTS and cammed 2 tone vtr.
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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.
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23rd April 2010, 09:23
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#8
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Saxperience Forum Bum
Join Date: Jul 2007
Location: EDINBURGH
Posts: 3,143
Car(s): BMW e36 328i sport
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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.
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23rd April 2010, 09:34
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#9
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Saxperience Post Whore
Join Date: Jun 2006
Location: Ramsey st marys, peterborough
Posts: 8,288
Car(s): Saxo's, Corsa (Daily)
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just have to sort the timing out during mapping.
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23rd April 2010, 10:12
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#10
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Saxperience Forum Bum
Join Date: Feb 2007
Location: Nuneaton
Posts: 3,554
Car(s): EP3 Civic
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you should be running a Lambda though.
I take it you are going to get it remapped?
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23rd April 2010, 10:57
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#11
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Saxperience Post Whore
Join Date: Jun 2006
Location: Ramsey st marys, peterborough
Posts: 8,288
Car(s): Saxo's, Corsa (Daily)
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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
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23rd April 2010, 12:24
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#12
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Established Member
Join Date: Jan 2005
Location: England
Posts: 1,744
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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
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23rd April 2010, 12:28
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#13
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Saxperience Forum Bum
Join Date: Dec 2009
Location: Uckfield, East Sussex
Posts: 3,362
Car(s): Citroen saxo 1.4 furio
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Why would you want to run without a lambda anyway?
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23rd April 2010, 12:33
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#14
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Saxperience Addict
Join Date: Jul 2005
Location: Solihull / Bournemouth
Posts: 14,233
Car(s): 2015 Lapiz Blue Golf R
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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
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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.
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23rd April 2010, 13:04
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#15
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Established Member
Join Date: Jan 2005
Location: England
Posts: 1,744
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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
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23rd April 2010, 13:42
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#16
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Saxperience Hardcore!
Join Date: Oct 2008
Location: Birtley
Posts: 22,253
Car(s): VTR Turbo, 106 xsi track slag, Transit recovery, B
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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
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