Engine: 2.1 F/Inj B21E: - KJet Idle ... How to adjust?

Big 240 · Dec 6th, 2022, 10:17

So I have recently solved my issues with my new to me 240. After changing in-tank pump, fuel pump relay, new leads/plugs/cap and rotor. Checked all filters etc the engine now starts first time and runs nice and smooth.

The only issue now is the idle is running high, I have a feeling it may have been adjusted in the past to counteract the fueling issues.

I am not sure how to adjust it, the Haynes manual is a little.... over complicated. I would say it's currently running about 1200rpm, so how do I reduce this guys?

I did have a search on here, but couldn't find what I needed.

Thanks

Bob Meadows · Dec 6th, 2022, 10:36

The idle turn screw is a largish black plastic one just under the throttle body:~
Turned by hand up to slow down for faster:

Picture may help- highlighted in yellow.
Regards Bob.

Big 240 · Dec 6th, 2022, 10:40

Perfect thanks

Big 240 · Dec 12th, 2022, 08:48

Quick update, twiddled the black knob, running sweet again now

JDW3696 · Dec 16th, 2022, 13:57

If you haven't done so replace the injector o rings at somepoint. Cheap and made the idle on mine run lovely too.

Big 240 · Dec 16th, 2022, 14:04

Quote:

Originally Posted by JDW3696

If you haven't done so replace the injector o rings at somepoint. Cheap and made the idle on mine run lovely too.

I have these on my list

140 · Dec 18th, 2022, 13:16

I would also remove sometime the butterfly casing witch the idle screws into and give it a good internal clean as the channels in the casting will slowly carbon up. i would be very surprised if you have to adjust the butterfly stop if it hasn't been moved from new but you may need new gaskets. this will the idle speed.

Dec 6th, 2022, 10:17	#1
Big 240 Member Last Online: Apr 25th, 2024 15:24 Join Date: Sep 2018 Location: Harrogate	KJet Idle ... How to adjust? So I have recently solved my issues with my new to me 240. After changing in-tank pump, fuel pump relay, new leads/plugs/cap and rotor. Checked all filters etc the engine now starts first time and runs nice and smooth. The only issue now is the idle is running high, I have a feeling it may have been adjusted in the past to counteract the fueling issues. I am not sure how to adjust it, the Haynes manual is a little.... over complicated. I would say it's currently running about 1200rpm, so how do I reduce this guys? I did have a search on here, but couldn't find what I needed. Thanks Last edited by Big 240; Dec 6th, 2022 at 10:24.

Dec 6th, 2022, 10:40	#3
Big 240 Member Last Online: Apr 25th, 2024 15:24 Join Date: Sep 2018 Location: Harrogate	Perfect thanks

Dec 12th, 2022, 08:48	#4
Big 240 Member Last Online: Apr 25th, 2024 15:24 Join Date: Sep 2018 Location: Harrogate	Quick update, twiddled the black knob, running sweet again now

Dec 16th, 2022, 13:57	#5
JDW3696 Senior Member Last Online: Jul 5th, 2023 07:30 Join Date: Sep 2018 Location: Stevenage	If you haven't done so replace the injector o rings at somepoint. Cheap and made the idle on mine run lovely too.

Dec 18th, 2022, 13:16	#7
140 Junior Member Last Online: Apr 24th, 2024 18:13 Join Date: Feb 2015 Location: Norwich	I would also remove sometime the butterfly casing witch the idle screws into and give it a good internal clean as the channels in the casting will slowly carbon up. i would be very surprised if you have to adjust the butterfly stop if it hasn't been moved from new but you may need new gaskets. this will the idle speed.

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