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I have a 650 double pumper that acts like it is starving for fuel after revving it up for a few seconds, what can I do?

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Have you checked the air filters?

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I have a 454ci chevy engine what would give me more HP a duel quad carb. set up or a triple carb. set up?.

it is very possible to over fuel an engine and that puts the fire out regardless of the power required so extra carbies is not the answer
a single 4 barrel 650 -750 double pumper will do as well if not better than 2 carbies
if you want more hp , turbo it , change the cam to a torque cam, tuned headers , proper balanced exhaust system, top quality ignition system
if you want to be an all out rev head and make the engine as hot as possible , fuel injection is the way to go along with a high rpms cam

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It seems your fuel pump fails at idle speed. I would first ensure that fuel pump is well fitted, no leaks, and good diaphragm condition.

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Check fuel pressure. If weak then either fuel pump or filter need replacing.

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You would connect a fuel pressure gauge in the line to the fuel rail with a Tee fitting. I don't think early model Toyota engines had a test port but I could be wrong.
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1993 passat starts but then it loses spark

There is a pre fuel pump in the gas tank that you can get to under a round black cover with three screws in the trunk. That pump transfers fuel to the main pump. Sounds like your main pump is starving for fuel. Not sure if this is your issue but its something to check. have someone crank or start the car if possible and listen to the pre pump. If you put your hand on it you should feel it running.

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