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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Elpresidente on January 19, 2011, 04:25:11 pm
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I've got an '82 Chev Scottsdale, 305 4bbl/700R4.
Since its freezing here (-40 this morning), my engine's had a problem of bogging down when I accelerate. It gets worse as the temperature outside drops, but after the engine & tranny warm up from driving a mile or so it runs fine.
In park or neutral it idles and responds well to the throttle, its when I put it into gear that the problem starts. I have to feather the gas to keep it running.
Even if I let the truck idle and warm up to operating temperature, it still bogs down a bit. Its definitely due to the cold weather, because it never did this before winter came.
The engine's clean with all new filters and plugs, so I can rule those out.
Im thinking maybe the transmission (because the problem starts when put into gear), or the choke sticking. But how can I tell?
Any help appreciated.
Thanks.
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It bogs down when you put it in gear only because of the extra load on the engine. You could try stepping up the idle a little bit, or richen your fuel mixture. Cold motors like gas.
If it doesn't fix itself after having fully warmed up and been driven, I would suspect the accelerator pump.
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Could it maybe be due to the butterfly valve in the carb sticking when accelerating?
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doubtful, but regardless ill clean it out as best as I can and adjust the idle a bit and see if that helps at all.
Thanks