22r carb help!

knottshawk · 12-05-2005, 05:16 PM

I've got a 90 pu with the 22r. It's been stumbling occasionally when driving a consistent speed. So, I put some higher octane fuel in it to see what would happen. Well, it seems worse now. So, I popped off the air cleaner and, well, pardon my ignorance (I'm used to 4 bbl carbs), but this thing seems to have one jet and 2 intakes? Is that right? Anyways, the intake, without the jet in it, is mostly closed (butterfly valve) even when warmed up.

SO, all that to say: Is this a vacuum problem? Is this valve run by the EGR? I need ideas here... thanks in advance.

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Elton · 12-05-2005, 05:17 PM

did you search ?

knottshawk · 12-05-2005, 05:19 PM

Search for what? "What's that carb part?"
I mean seriously.... Isn't my question(s) a little too nebulus for that?

tc · 12-05-2005, 05:42 PM

Try Seafoam or other carb/injector cleaner?

Electric choke on these IIRC.

When mine started doing that, I just replaced it with a Weber 32/36 and never looked back.

knottshawk · 12-05-2005, 05:44 PM

So is that second butterfly valve supposed to be shut even after warming up?

86toyota · 12-05-2005, 05:46 PM

No. Only closed on warmup

knottshawk · 12-05-2005, 05:51 PM

Um, by "on warmup", do you mean while warming up? Or after the truck is warmed up?

86toyota · 12-05-2005, 06:00 PM

While warming up. On a cold engine after you turn on the key(not cranking yet),you should step on the throttle fully a couple times. That should close the choke fully, then start it up. the truck should run at high idle for maybe 2-5 minutes then kick down automactically, opening the choke butterfly.

Sounds like your choke isn't working correctly.

86toyota · 12-05-2005, 06:01 PM

I didn't know they still used carbs on 90's???

kyle_22r · 12-05-2005, 07:07 PM

2wds were available carbed until '90 or '91

on a lot of the carbs, the secondary choke flap stays shut until you mash the throttle. that's why putting on a weber 32/36 often increases performance, since the carb isn't operating at full potential.

if your engine is stumbling at constant speed i might check the EGR system to make sure it's functioning properly.

knottshawk · 12-05-2005, 07:43 PM

Where is the EGR on these things? A buddy of mine said to just disconnect the EGR and see how it runs after that...

kyle_22r · 12-05-2005, 09:42 PM

EGR is the little gadget next to the intake manifold towards the back of the engine.

12-05-2005, 05:17 PM	#2 (permalink)
Elton Contributing Member Join Date: Jul 2005 Location: Siletz,Oregon Posts: 10,648	did you search ? __________________ My Truck 98 4runner SR5 3.4L 5spd 4x4 E-Locker Mods Mom 07 Tundra d-cab limited 5.7L 4x4 auto sister 92 pickup SR5 X-cab 3.0L 5spd 4x4 Papa 89 Pickup SR5 X-cab 4x4 3.0L 5spd/98 4runner SR5 4x4 auto 3.4L R.I.P 91 4runner SR5 4x4 3.0L 5spd Totaled 5/13/06 My Wreck

12-05-2005, 05:42 PM	#4 (permalink)
tc Contributing Member Join Date: Nov 2005 Location: Longmont, CO Posts: 8,372	Try Seafoam or other carb/injector cleaner? Electric choke on these IIRC. When mine started doing that, I just replaced it with a Weber 32/36 and never looked back. __________________ Check out www.coTTORA.org to hook up with great Toyota 'wheelin' folks! Current - 93 4Runner: 3VZ 33"x10.50" no lift ARB F/R 96 Impala SS: My own personal cop car Previous - 89 2WD Pickup 22R, Fabtech "Ivan Dan" lift, 31x10.50, IASCA World Finals 4th Place Stop with the mods and get on the trail! Pix at www.4wheelingoh.shutterfly.com/action

12-05-2005, 05:46 PM	#6 (permalink)
86toyota Contributing Member Join Date: Jan 2004 Location: Trafford, Pa Posts: 1,158	No. Only closed on warmup __________________ Gregg 86 yota extra cab, 4" Pro comp, 33's, cam, header,CF Dual friction, K&N, and so on... (SOLD) 89 toyota 4x4 flatbed MY TRUCK

12-05-2005, 06:00 PM	#8 (permalink)
86toyota Contributing Member Join Date: Jan 2004 Location: Trafford, Pa Posts: 1,158	While warming up. On a cold engine after you turn on the key(not cranking yet),you should step on the throttle fully a couple times. That should close the choke fully, then start it up. the truck should run at high idle for maybe 2-5 minutes then kick down automactically, opening the choke butterfly. Sounds like your choke isn't working correctly. __________________ Gregg 86 yota extra cab, 4" Pro comp, 33's, cam, header,CF Dual friction, K&N, and so on... (SOLD) 89 toyota 4x4 flatbed MY TRUCK

12-05-2005, 06:01 PM	#9 (permalink)
86toyota Contributing Member Join Date: Jan 2004 Location: Trafford, Pa Posts: 1,158	I didn't know they still used carbs on 90's??? __________________ Gregg 86 yota extra cab, 4" Pro comp, 33's, cam, header,CF Dual friction, K&N, and so on... (SOLD) 89 toyota 4x4 flatbed MY TRUCK

12-05-2005, 05:19 PM	#3 (permalink)
knottshawk Registered User Join Date: Nov 2005 Posts: 7	Search for what? "What's that carb part?" I mean seriously.... Isn't my question(s) a little too nebulus for that?

12-05-2005, 05:44 PM	#5 (permalink)
knottshawk Registered User Join Date: Nov 2005 Posts: 7	So is that second butterfly valve supposed to be shut even after warming up?

12-05-2005, 05:51 PM	#7 (permalink)
knottshawk Registered User Join Date: Nov 2005 Posts: 7	Um, by "on warmup", do you mean while warming up? Or after the truck is warmed up?

12-05-2005, 07:07 PM	#10 (permalink)
kyle_22r Registered User Join Date: Mar 2003 Location: Lacey, WA Posts: 3,992	2wds were available carbed until '90 or '91 on a lot of the carbs, the secondary choke flap stays shut until you mash the throttle. that's why putting on a weber 32/36 often increases performance, since the carb isn't operating at full potential. if your engine is stumbling at constant speed i might check the EGR system to make sure it's functioning properly. __________________ 1998 tacoma, 3RZ-FE, 5 speed, 30x9.5R15 M/Ts past toys: 1984 4x2 1979 4x4 1991 4x4

12-05-2005, 07:43 PM	#11 (permalink)
knottshawk Registered User Join Date: Nov 2005 Posts: 7	Where is the EGR on these things? A buddy of mine said to just disconnect the EGR and see how it runs after that...

12-05-2005, 09:42 PM	#12 (permalink)
kyle_22r Registered User Join Date: Mar 2003 Location: Lacey, WA Posts: 3,992	EGR is the little gadget next to the intake manifold towards the back of the engine. __________________ 1998 tacoma, 3RZ-FE, 5 speed, 30x9.5R15 M/Ts past toys: 1984 4x2 1979 4x4 1991 4x4

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