Topic: Adjusting idle

[Rebeltilldeath3]

How do I adjust my idle?

When at OT, my truck barely idles fast enough to run, and shuts off a lot.  I'm guessing it's at 100rpms, it's below the first mark above 0. I put in a new EGR and fuel injectors, my idle has dropped significantly.

[Prismo]

The arrow points to the adjusting screw. Clockwise to increase idle.

[BigMike]

Don't you mean CCW?

If the idle screw is out so far yet the idle is still low, make sure that your TPS sensor is adjusted correctly..

Go here: http://board.marlincrawler.com/index.php?topic=5959.0 and read reply #10 at the bottom.

Regards,
BigMike

[Uncle Jesse]

One thing I ran across on my 89 is low coolant level.  It sounds wierd, but the auxillary air valve is coolant heated.  I had low idle and stalling prblems until I found out I was low on coolant.  I'm guessing air pockets in the auxillary air valve make the idle funky.  I never really figured it out.  Earlier re's used a different auxillary air valve, so I don't know if they operate the same way.  Also, along these same lines, make sure the engine is truly at operating temperature when you adjust the idle screw.  Otherwise, when summer comes it will definietly idle low.  Good luck.

[Prismo]

Don't you mean CCW?

I better stick with screw it out or to the left from now on lol

[Rebeltilldeath3 [OP]]

One thing I ran across on my 89 is low coolant level. It sounds wierd, but the auxillary air valve is coolant heated. I had low idle and stalling prblems until I found out I was low on coolant. I'm guessing air pockets in the auxillary air valve make the idle funky. I never really figured it out. Earlier re's used a different auxillary air valve, so I don't know if they operate the same way. Also, along these same lines, make sure the engine is truly at operating temperature when you adjust the idle screw. Otherwise, when summer comes it will definietly idle low. Good luck.

Yeah, I know that.  My truck isn't holding coolant well at all, it's all being blown out by back pressure.  I just want to step the idle up until I get my coolant issue fixed.