G13B Fast Idle help?

Thanks... already replaced the air intake temperature sensor, as the MOT fella noticed the high idle (was effecting emissions) and hooked up an ODB panel and it was reading 27oC - so it looked like the ECU was trying to compensate by making the engine run faster, to try and cool it more...?

Interesting watch - 

 

Yours can be read from an ODB panel?? Surely its too early for that unless he had one that reads older Suzuki set ups?

The Input Air Temp sensor is high resistance when it is cold and low when it is hot. It should be around 2kohm at 20 degrees C

Yes, I warned him it was an old format of ODB (I remembered reading it on this fine forum), so he went through four panels ending up with a dusty one from the bottom drawer of a SnapOn series of cabinets, but yes, in the end he established a link...

I'm sure I read you’d linked to an old one too?

 

One of these I got -

 

 
Fixed the fast idle today!

Started with the intake manifold...

 

It didn't look too bad?

 

But after a good clean quite a bit came off and onto the rag...

 

That's better! All around the intake, round the flap's edges, all round where it sits when closed...

 

And then the vacuum pipe left exposed after ripping all the vacuum free wheeling hub gubbins out...you can just about make it out in the yellow circle...

 

So some silicon hose with a self-tapper screwed into the end...

 

And wiggled into place to cap the escaping vacuum...

Reassemble everything, and then she...



Runs a lot better! 1,500rpm is a lot better than when it was running a little over 2,000rpm, I can live with that!

Thanks to Riccy for suggesting cleaning the intake manifold and idle control valve out, and to James for pointing out the exposed vacuum after taking the free wheel hub gubbins out! Where would we be without the amassed knowledge here on this fine forum