Should the engine stall out when the idle adjustment screw is completely closed?

YotaJunky · 10-25-2005, 05:38 AM

I'm still dealing with a rough idle and I've now moved on to inspecting the air valve operation by fully screwing in the idle speed adjustment screw.

The FSM says that when the engine is cold (below 176 F) and the idle adjustment screw is fully screwed into the TB, the engine rpm should drop. It did not say that the engine should stall out.

The FSM also says that when the engine is warm and the idle adjusting screw is fully in, the engine rpm should drop below the idle speed stop (I don't understand this statement). It did not say however, that the engine should stall out.

I've noticed that irregardless of whether the engine is either cold or warm, and the idle adjustment screw is fully in, the engine stalls out. I've cleaned the TB, the screw, and correctly adjusted the TPS. I've got no codes.

I have a TB with a coolant hose that feeds in from one side of the TB and then another that comes out the other side. I've read from another post that the changing temperature of the coolant varies the size of an orifice inside the TB which in turn affects the air valve operation.

Any suggestions would be appreciated.

Troy

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YotaJunky · 10-25-2005, 04:48 PM

bump...

superjoe83 · 10-25-2005, 05:22 PM

mine stalls if i turn it all the way in, but only if i do it fast, if i turn it in very slowly i can get it to idle with the screw all the way in but the idle is about 300-400 rpm

YotaJunky · 10-25-2005, 05:42 PM

Quote:

Originally Posted by superjoe83

mine stalls if i turn it all the way in, but only if i do it fast, if i turn it in very slowly i can get it to idle with the screw all the way in but the idle is about 300-400 rpm

Mine will stall out regardless of how fast or slow I turn it in. I'm wondering if this is a clue to my rough idle.

Anyone else out there try this test? Apparently, it's a test for the air valve.

Troy

10-25-2005, 04:48 PM	#2 (permalink)
YotaJunky Contributing Member Join Date: Feb 2005 Location: Vancouver BC Posts: 780	bump... __________________ '95 4WD 22R-E 4Runner, 5spd, 205k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD

10-25-2005, 05:22 PM	#3 (permalink)
superjoe83 Contributing Member Join Date: Feb 2004 Location: Oregon City, Oregon Posts: 1,870	mine stalls if i turn it all the way in, but only if i do it fast, if i turn it in very slowly i can get it to idle with the screw all the way in but the idle is about 300-400 rpm __________________ - Joe 1984 SR5 4runner, 22re, 5-speed, chevy 63"s, rears up front custom pack, BBCS shocks, 2" BL, 5.29's, welded rear, Detroit in front, Longfields, IFS Rear, 39.5x13.50x15 IROK's, Marlin's High Steer, MC07 with stock cases, Marlin's cross member, tube bumper, Warn XD9000, Allied Beadlocks 1999 Taco 2.7 5-speed, LCE Header, Jardine 2.25 Cat-Back, 3" Downey Coilover, 33x13.5 Toyo MT's, ARB Bull Bar, Retrofitted Acura TL HID Projectors with 50W ballasts and 50W DL50 Philips 3900k bulbs

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