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2003 Jimny rough idle how to adjust

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19 May 2024 20:45 #256001 by bonairediver2021
Hi Jimny Xperts!,
I have an old used 2003 Jimny JB23W engine K6A
and after starting, the idle speed drops perhaps too much 
because the idle then gets 'rough' and the car starts shaking
from the vibration. If I give it a bit more gas peddle it smooths out again.
I'm a total novice on working on cars, but I think I found something
in the engine that looks like an idle adjust screw.  It seems to be frozen
(21 years old car!).  If I spray WD40 on that screw, should I try to slightly
increase the idle speed by turning that screw clockwise (if I can get it to move at all)?

thanks for any suggestions!
Anthony

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19 May 2024 23:57 #256005 by fordem
If that K6A is fuel injected, I would suggest you not tamper with that screw.

The idle speed on a fuel injected engine is controlled by the ECU, if it is not correct, there is a problem preventing the ECU from controlling it and you need to find that problem and fix it, not adjust it out.

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