1992 Rodeo 3.1 V6 cold start / rough idle problem

Hello, I have a '92 Rodeo (3.1 liter v6 carb equipped) running really rough. I have to gun the heck out of it to keep it running in the morning and once it warms up, it idles kind of rough.
I am still getting about 19 MPG, so I'm thinking it's the choke behaving poorly.
Any ideas?
thanks
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I could be wrong, but I thought all the 3.1L (GM) engines were TBI (throttle body injection)... not carburetor. If that's the case, you might want to try some fuel / injector cleaner before you go to a bigger repair!
Good luck. Jeff
snipped-for-privacy@yahoo.com (bryan w) wrote in message

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no...it's definitely a carb.
snipped-for-privacy@yahoo.com (Jeff) wrote in message

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Well... I just checked the parts books, and they only show TBI for this engine. TBI does look (externally) just like a two barrel carburetor... but there's no float bowl, venturi tubes or choke plates. It uses two big injectors, located where the choke or venturi tubes would be on a carb. The computer tells the injectors when to spray fuel... instead of engine vacuum pulling fuel up and atomizing it.
If you've really got a carb on there, it probably doesn't belong. Either way, if it was running fine until recently, I'd try the fuel / injector cleaner. I've had some success on fixing fuel problems (both carb and injector) with it.
Good luck.
Jeff
snipped-for-privacy@yahoo.com (bryan w) wrote in message

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I have a 92 3.1 and it mine has a dual throttle-body fuel injector. Never heard of a carb.
However, I don't get anywhere 19Mpg in normal driving, so maybe I need a carb ?
Jim H

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bryan w wrote:

Perhaps a vacuum leak. We have the same set up but never this problem. I would love to get 19 MPG. We are closer to 12. Any hotshots out there with suggestions?
Frank
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get the 3.1L diesel straight 4 cyl...
rhys
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