22r carb help!
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. |
did you search ?
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Search for what? "What's that carb part?"
I mean seriously.... Isn't my question(s) a little too nebulus for that? |
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. |
So is that second butterfly valve supposed to be shut even after warming up?
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No. Only closed on warmup
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Um, by "on warmup", do you mean while warming up? Or after the truck is warmed up?
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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. |
I didn't know they still used carbs on 90's???
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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. |
Where is the EGR on these things? A buddy of mine said to just disconnect the EGR and see how it runs after that...
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EGR is the little gadget next to the intake manifold towards the back of the engine.
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