Another Revs/Idle Problem
16-01-2009, 04:55 PM
#1
Another Revs/Idle Problem
Hi another revs/idle problem.
When started from cold the revs increase to 1200 rpm and then when warm settles down to 900 rpm. This is ok.
However, when you give a litttle throttle or press the clutch in at juctions the revs seem to hunt up and down and then settles to 900rpm.
I tried unpluggin the ISCV today when warm and the engine just stalls.
The CO is set at about 6%
Any suggestions ??
When started from cold the revs increase to 1200 rpm and then when warm settles down to 900 rpm. This is ok.
However, when you give a litttle throttle or press the clutch in at juctions the revs seem to hunt up and down and then settles to 900rpm.
I tried unpluggin the ISCV today when warm and the engine just stalls.
The CO is set at about 6%
Any suggestions ??
16-01-2009, 05:37 PM
#2
Hi another revs/idle problem.
When started from cold the revs increase to 1200 rpm and then when warm settles down to 900 rpm. This is ok.
However, when you give a litttle throttle or press the clutch in at juctions the revs seem to hunt up and down and then settles to 900rpm.
I tried unpluggin the ISCV today when warm and the engine just stalls.
The CO is set at about 6%
Any suggestions ??
When started from cold the revs increase to 1200 rpm and then when warm settles down to 900 rpm. This is ok.
However, when you give a litttle throttle or press the clutch in at juctions the revs seem to hunt up and down and then settles to 900rpm.
I tried unpluggin the ISCV today when warm and the engine just stalls.
The CO is set at about 6%
Any suggestions ??
the reason why its stalling is probably because your CO is too high, and the ISCV cannot do its job
the ISCV should prevent the engine from stalling
get the CO% sorted ASAP
what chip do you run in your car assuming its not standard?
16-01-2009, 05:59 PM
#3
your CO% is way too high!!! - that's bore wash territory!
the reason why its stalling is probably because your CO is too high, and the ISCV cannot do its job
the ISCV should prevent the engine from stalling
get the CO% sorted ASAP
what chip do you run in your car assuming its not standard?
the reason why its stalling is probably because your CO is too high, and the ISCV cannot do its job
the ISCV should prevent the engine from stalling
get the CO% sorted ASAP
what chip do you run in your car assuming its not standard?
16-01-2009, 07:45 PM
#7
your engine should not stall when the iscv, is disconnected when shes hot....
your base idle is too low. adjust to 900 rpm via the tb screw.
the base idle should never be held on the iscv...its there to raise idle from the base setting only.
and NEVER adjust idle co without checking afr at all rpm at full boost.
the ecu screw adjusts the WHOLE fuel table as a percentage.
so by weakening it at idle will also weaken it at the top.
your base idle is too low. adjust to 900 rpm via the tb screw.
the base idle should never be held on the iscv...its there to raise idle from the base setting only.
and NEVER adjust idle co without checking afr at all rpm at full boost.
the ecu screw adjusts the WHOLE fuel table as a percentage.
so by weakening it at idle will also weaken it at the top.
Last edited by JTECH James; 16-01-2009 at 07:49 PM.
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16-01-2009, 08:43 PM
#8
the CO% depends on what chip you are running, each chip manufacturer idle setting will be different but "normally" its between 2 - 3 CO% for non lambda cars
BUT as jtech says; by adjusting it on the ecu screw you will adjust the whole map and not just for idle
i mean this in the nicest possible way; but if you dont know what your doing get it set up correctly
or if you are fairly capable; take the ecu out & open it; find out what chip you've got in it, phone the company manufacturer up quoting the serial number from the chip and they will tell you what the idle CO% should be.
then take your car to a garage that has an analyser for CO% and set it to the required CO%. (any half decent garage will have an analyser) or an MOT station as they have to have one
Matt
BUT as jtech says; by adjusting it on the ecu screw you will adjust the whole map and not just for idle
i mean this in the nicest possible way; but if you dont know what your doing get it set up correctly
or if you are fairly capable; take the ecu out & open it; find out what chip you've got in it, phone the company manufacturer up quoting the serial number from the chip and they will tell you what the idle CO% should be.
then take your car to a garage that has an analyser for CO% and set it to the required CO%. (any half decent garage will have an analyser) or an MOT station as they have to have one
Matt
Last edited by LHD220Turbo; 17-01-2009 at 10:10 AM.
18-01-2009, 02:23 PM
#11
Just a quick update:-
Whilst replacing the O rings on the ISCV I noticed that the piston was seized, therefore I soaked it in thin oil overnight and it now moves freely.
Replaced the ISCV, got the engine up to temp, removed the ISCV plug and the engine still stalled.
I've adjusted the idle screw accordingly and I'm glad to say that it's now at a point where I can pull the ISCV plug and it still revs sweet.
Thanks for the above suggestions lads !!
I await my next problem.
Whilst replacing the O rings on the ISCV I noticed that the piston was seized, therefore I soaked it in thin oil overnight and it now moves freely.
Replaced the ISCV, got the engine up to temp, removed the ISCV plug and the engine still stalled.
I've adjusted the idle screw accordingly and I'm glad to say that it's now at a point where I can pull the ISCV plug and it still revs sweet.
Thanks for the above suggestions lads !!
I await my next problem.
18-01-2009, 02:45 PM
#12
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One thing overlooked shall your thottle cable not been near the turbo and swollon mine did and was doing that didnt find out till broke and new one fitted the old was no heat shield
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