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Why does my 87 Chevy 350 seem to stumble and become very sluggish upon acceleration even though timing is on?
Wiki User
∙ 9y ago
Plugged fuel filter?
Plugged air filter?
Plugged catalytic converter?
Replaced fuel pressure regulator, idle air control, distributer, cap, rotar, has new plugs and wires, timing gears and gaskets,timed to specs runs like a top when idleing only when under load does it see like it can't breath yet there are no cats on it straight pipe from manifold. Parts listed above were replaced and ran like a top now not even a week after fixing it does this... >_< ... I thought it was timing but it appears not to be the issue
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoCould be, plugged fuel filter, faulty fuel pump, faulty/dirty fuel injector(s), plugged/damaged catalytic converter,
Assuming this engine has throttle body fuel injection, remove the air filter assembly and run the engine at idle. Notice the fuel spray coming from each fuel injector. They should have a nice smooth umbrella shaped spray coming from each injector. If not check the fuel pressure, should be 9-13 psi. If one is spraying nice and the other (or both) is pouring or dripping fuel, you may have dirty or faulty injectors.
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