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Hi. I'm Phil from Cleveland, OH. I have a '94 Chevy G20 van with a 350 engine. It was recently tuned up with genuine GM parts (distributor cap, rotor, wires, and plugs. After it warms up, it idles rough and almost stalls out, like it's running too rich and "loading up". Also when accelerating at 50 mph on an upgrade (trans in overdrive) it occasionally misses or "jerks". The jerking goes away if I drop down into regular drive position. Any ideas?
 

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Welcome to the club. When was the fuel filter changed, the throttlebody & IAC cleaned?
 

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Welcome to the club man, has the tranny had any work done since you bought it or from the previous owner?? Might want to check seals and fluids may need some work,
 

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Welcome to the club Phil. Are you getting any trouble codes?
 

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Welcome to the G M T C !
 

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Welcome aboard!
 

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Welcome to the club Phil. Some one will know the answer to your question.
 

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Welcome!........
 
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