Lean drop - FSM vs Sticker (1 Viewer)

[OhioFJ]

Greetings - I recently noticed that the sticker under my hood describes the lean drop method with a target of 800 rpm. This is different than the fsm (and everything I’ve read online) which describes a target of 650 rpm. I’ve tuned to 650 and all seems good, but I might retry to tune at the higher value to see if anything changes.

1979 2f btw

anyone have any insight into this?

Thank you

 

[Dizzy]

800rpm seems like too much for the engine itself. Do you have engine accessories, power steering, AC, smog pump? I can barely hear my 2F at idle; it is probably in the high 500s, and love it.

 

[OhioFJ]

Yes it has stock ps and aftermarket ac. You think Toyota increased the idle rpm because of the ps?

 

[Dizzy]

? no clue.

 

[ToyotaMatt]

hi Ari

do you have a stand alone mechanical full needle sweep vacuum gauge available to use here on this topic ?

like my example pic here of the one installed in my 2005 TUNDRA ?

 

[OhioFJ]

I do. It’s not as nice as your yazaki.

It’s pulling about 17-18 at idle.

 

[OhioFJ]

If I set the idle rpm higher would this Just reduce my fuel efficiency? Any possible benefit?

I can understand that the power steering might function better.. easier to turn while still.

 

[ToyotaMatt]

If I set the idle rpm higher would this Just reduce my fuel efficiency? Any possible benefit?

I can understand that the power steering might function better.. easier to turn while still.

Do you know and understand Ari , how to use and apply the vacuum gauge final Tweek Timing adjustment technique ?

if not , thats ok ,

I can help you , give me a shout on my shop hot line # , i will better explain over a 5 minute Live Tech call , then you be expert on this ..

 

[OhioFJ]

Thanks Matt - I'll try to ring tomorrow. Ari