High idle (excuse the noob)
High idle (excuse the noob)
manners first I guess
My name is Stuart and I've owned my IS200 for about three weeks now. Very impressed with the car overall and amazed at how much you get for the money :thumbup1:
Anyway, when I bought the car the lad said that occasionally it would idle a bit high when it was stone cold, but this would only happen now and again and never once the engine was warm.
True enough.
No issues from warm and not once a high idle.
Until yesterday :cursing:
It idles at about 2k and even as high as 2.5k, although this does get better once it's warmed up and presents no issues when you are driving.
The normal Google searches have offered no clear answer other than look out for coil packs (I have no misfire at any revs)
Any advice would be greatly appreciated. Thanks
Threadkiller
22-12-2017, 12:52 PM #1Hi Guys
manners first I guess
My name is Stuart and I've owned my IS200 for about three weeks now. Very impressed with the car overall and amazed at how much you get for the money :thumbup1:
Anyway, when I bought the car the lad said that occasionally it would idle a bit high when it was stone cold, but this would only happen now and again and never once the engine was warm.
True enough.
No issues from warm and not once a high idle.
Until yesterday :cursing:
It idles at about 2k and even as high as 2.5k, although this does get better once it's warmed up and presents no issues when you are driving.
The normal Google searches have offered no clear answer other than look out for coil packs (I have no misfire at any revs)
Any advice would be greatly appreciated. Thanks
Dark Samurai
22-12-2017, 01:12 PM #2ECU reset mate, pull the EFI and ETCS fuses for a few minutes and that should bring down idle
Thanks
Threadkiller
22-12-2017, 01:18 PM #3OK, I'll try that. Any idea what's caused it then? It wasn't like that for the first couple of hundred miles of ownership.
Thanks
But just know after an ECU reset, our IS300 had a lower idle .You'll have to wait on the likes of Phil01/Rabster/SparkyStav/Bandit/Ormi to come along and tell you more?
Dark Samurai
22-12-2017, 01:20 PM #4I have no idea mate, I'm only 14 But just know after an ECU reset, our IS300 had a lower idle .
You'll have to wait on the likes of Phil01/Rabster/SparkyStav/Bandit/Ormi to come along and tell you more?
If you've got another hole somewhere letting air in then the ECU won't be able to accurately control the idle speed as it's not the only thing letting air in at idle. Additional confusion will come from the MAP sensor measuring the air pressure of the air outside your engine, when it should be in a vacuum of about 25-30inHG at idle.
Resetting the ECU will make it relearn some parameters about engine control. This will affect things like how much air and fuel are required to make the engine operate correctly as far as the ECU is concerned, so it might relearn your idle. But that should only be the case if something had been changed since the ECU last set itself up.
To raise the idle by over 1000rpm (you must struggle to get it into reverse when it's doing that!!) it must be quite a hole. If I open a hole in the inlet manifold on my car (admittedly not an IS200) the size of a 5p piece it raises the idle by around 800-900rpm. As a result, you should be able to hear it. The 1G-FE is quite a quiet engine so you may be able to pinpoint a whistling/sucking noise in the engine bay when it is idling high.
My 2p, hope that helps.
Too much air getting in causes a high idle. When you haven't got your foot on the loud pedal the throttle is shut, blocking airflow into the engine. The ECU controls the amount of air that gets in via the idle control valve. This basically opens up a small hole to allow air in (the ECU controls the size of the hole by opening the valve more or less), because getting no air at all would cause the engine to stall (you need air for combustion to occur).
If you've got another hole somewhere letting air in then the ECU won't be able to accurately control the idle speed as it's not the only thing letting air in at idle. Additional confusion will come from the MAP sensor measuring the air pressure of the air outside your engine, when it should be in a vacuum of about 25-30inHG at idle.
Resetting the ECU will make it relearn some parameters about engine control. This will affect things like how much air and fuel are required to make the engine operate correctly as far as the ECU is concerned, so it might relearn your idle. But that should only be the case if something had been changed since the ECU last set itself up.
To raise the idle by over 1000rpm (you must struggle to get it into reverse when it's doing that!!) it must be quite a hole. If I open a hole in the inlet manifold on my car (admittedly not an IS200) the size of a 5p piece it raises the idle by around 800-900rpm. As a result, you should be able to hear it. The 1G-FE is quite a quiet engine so you may be able to pinpoint a whistling/sucking noise in the engine bay when it is idling high.
My 2p, hope that helps.
Welcome btw check out the meets section there might be one coming up that is close for you then you can meet the gang
(Thanks toxo) No issues with reverse by the way.Will also look for the meets section and see what's around.
Threadkiller
22-12-2017, 02:35 PM #7No idea about a service Rabster (long story) but I'll try the reset and go from there; that is, after I have checked under the bonnet for a big hole (Thanks toxo) No issues with reverse by the way.
Will also look for the meets section and see what's around.
)I only fired the car for a few moments but it immediately settled at around 1400rpm and that's a fair bit better than before
Happy days! I'll have a good look for leaks when I have some daylight to play with
Threadkiller
23-12-2017, 10:22 AM #8I did the ECU reset described in your workshop tips section (****** useful that )
I only fired the car for a few moments but it immediately settled at around 1400rpm and that's a fair bit better than before
Happy days! I'll have a good look for leaks when I have some daylight to play with
[SIGPIC][/SIGPIC] [COLOR="DarkOrchid"]That symbol on the side of my door.. Definition by FirebirdPhil 'Translated it means -
"try to overtake - go on give it a go I dare you......." [/COLOR]
I'm not an Outlaw; I'm a Poutlaw! Purple Supras are the bestest! I love purple .. a lot lot lot
purplewitch
23-12-2017, 10:30 AM #9Welcome to Outlaws
[SIGPIC][/SIGPIC] [COLOR="DarkOrchid"]That symbol on the side of my door.. Definition by FirebirdPhil 'Translated it means -
"try to overtake - go on give it a go I dare you......." [/COLOR]
I'm not an Outlaw; I'm a Poutlaw! Purple Supras are the bestest! I love purple .. a lot lot lot
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the throttle body may be dirty aswell remove this and give the butterfly a good clean
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
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