Throttle body

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Throttle body

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Stoney
Posting Freak

2,117

13-07-2018, 03:14 AM

#11

Great info mate.

ad: It was a tough call to make, but the Supercharged IS200 is being retired. Confused

ad:

Stoney

13-07-2018, 03:14 AM #11

Great info mate.

ad: It was a tough call to make, but the Supercharged IS200 is being retired. Confused

ad:

toxo
Posting Freak

4,843

13-07-2018, 03:18 AM

#12

There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

toxo

13-07-2018, 03:18 AM #12

There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

Stoney
Posting Freak

2,117

13-07-2018, 03:20 AM

#13

toxo There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

I believe they are.

ad: It was a tough call to make, but the Supercharged IS200 is being retired. Confused

ad:

Stoney

13-07-2018, 03:20 AM #13

toxo There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

I believe they are.

ad: It was a tough call to make, but the Supercharged IS200 is being retired. Confused

ad:

sprinter2012
Posting Freak

2,484

15-07-2018, 10:27 AM

#14

toxo PCV passes oil vapour back into the intake. This can gum up the IACV (idle air control valve) which is what lets a small amount of air past the throttlebody to allow the engine to idle. That's quite common.

They might've recalibrated & cleaned your TPS as well (throttle position sensor). This is the black lump that sits on the end of the shaft through the middle. It tells the ECU how open the throttle is (i.e. how flat to the floor your foot is) and also has a switch in it that engages when the throttle is shut, to tell the ECU that it should be idling.

I wonder if maybe this could be related to my 'Car sometimes wont start first time' problem HERE

I've got some seafoam fuel treatment/injector cleaner stuff so I'll spray a bit down the throttle body and see if it helps.

sprinter2012

15-07-2018, 10:27 AM #14

toxo PCV passes oil vapour back into the intake. This can gum up the IACV (idle air control valve) which is what lets a small amount of air past the throttlebody to allow the engine to idle. That's quite common.

They might've recalibrated & cleaned your TPS as well (throttle position sensor). This is the black lump that sits on the end of the shaft through the middle. It tells the ECU how open the throttle is (i.e. how flat to the floor your foot is) and also has a switch in it that engages when the throttle is shut, to tell the ECU that it should be idling.

parthiban
Posting Freak

4,925

16-07-2018, 12:04 AM

#15

Good info there Toxo.

Could be, worth having it cleaned, can't believe the difference in my car before and after.

And yep £65 was money well spent as I didn't have a clue, plus it was at least half an hours work? So didn't seem too expensive, especially at dealer rates.

2002 '02' IS200 SE Auto - DVD Satnav with Voice Activation - [COLOR="Blue"]Strathcaron Blue - Parking Sensors - 5000K HIDs with Anti-Glare Bulbs - PIAA 6500K Main Beams - LED Sidelights - Mirror/Sunroof Closure - TTE Styling Kit - 18" Styling Kit Alloys with nitrogen filled Goodyear Eagle F1 Asymmetric Tyres - Bluetouch Multimedia Kit - Gromaudio AUX in - Black painted calipers with silver Lexus decals - 12 LED Dome Light - 96 LED Boot Light - Stainless Steel Sport Sill Plates - PIAA Silicone Wipers[/COLOR]

parthiban

16-07-2018, 12:04 AM #15

Talisker
Member

118

17-07-2018, 08:59 AM

#16

toxo There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

The IS200 is a bit of old school fly-by-cable and fly-by-wire. The throttle cable moves a cam on the throttle body then the ECU decides what it can do and servos move the butterfly valve.
I think that's right :blink:

Talisker

17-07-2018, 08:59 AM #16

toxo There could be yet more complication but I can't remember if IS200s are fly-by-wire or not.

toxo
Posting Freak

4,843

17-07-2018, 11:45 PM

#17

Talisker The IS200 is a bit of old school fly-by-cable and fly-by-wire. The throttle cable moves a cam on the throttle body then the ECU decides what it can do and servos move the butterfly valve.
I think that's right :blink:

Sounds plausible. The MKIV LS400 is the same.

toxo

17-07-2018, 11:45 PM #17

Talisker The IS200 is a bit of old school fly-by-cable and fly-by-wire. The throttle cable moves a cam on the throttle body then the ECU decides what it can do and servos move the butterfly valve.
I think that's right :blink:

Sounds plausible. The MKIV LS400 is the same.

jimxms
Posting Freak

2,473

19-07-2018, 12:47 AM

#18

If the IS200 throttle cable is anything like the IS300 one, it's well worth checking that there's no slack in the cable where it meets the throttle body. There's a couple of bolts you can use to adjust it in much the same way as the brakes on a bicycle.

I tightened up mine yesterday as it was quite saggy, and the difference in throttle response is massive.

Edited 30-08-2011, 10:24 AM by jimxms.

jimxms

19-07-2018, 12:47 AM #18

toxo
Posting Freak

4,843

19-07-2018, 12:50 AM

#19

jimxms If the IS200 throttle cable is anything like the IS300 one, it's well worth checking that there's no slack in the cable where it meets the throttle body. The's a couple of bolts you can use to adjust it in much the same way as the brakes on a bicycle.

I tightened up mine yesterday as it was quite saggy, and the difference in throttle response is massive.

I think that's true of all cars :lol: Certainly nearly every one that I've worked on has had slack in the throttle cable, and it does make a big difference.

toxo

19-07-2018, 12:50 AM #19

jimxms If the IS200 throttle cable is anything like the IS300 one, it's well worth checking that there's no slack in the cable where it meets the throttle body. The's a couple of bolts you can use to adjust it in much the same way as the brakes on a bicycle.

I tightened up mine yesterday as it was quite saggy, and the difference in throttle response is massive.

I think that's true of all cars :lol: Certainly nearly every one that I've worked on has had slack in the throttle cable, and it does make a big difference.

jimxms
Posting Freak

2,473

19-07-2018, 12:53 AM

#20

toxo I think that's true of all cars :lol: Certainly nearly every one that I've worked on has had slack in the throttle cable, and it does make a big difference.

Lol yeah, though I've only ever worked on the IS300 as my previous ride was a push bike :p

I also fixed a load of other f*kups i made on my car last night and the car drives 1000x better now, but that's a story for another thread.

jimxms

19-07-2018, 12:53 AM #20

toxo I think that's true of all cars :lol: Certainly nearly every one that I've worked on has had slack in the throttle cable, and it does make a big difference.