Evilthing13
Newbie
So I have this gmc van,I know it’s not a truck but the people on this forum seem to be the most knowledgeable community for these tbi gm engines and I figured the powertrain on this vehicle is basically the same setup as the trucks. Anyways I have a 95 g30 5.7l 4l80e rally van and I have an issue where when I accelerate the van seems a bit sluggish even for a 1 ton van, if I blip the throttle while accelerating it seems a little more power is returned.
To date I’ve installed a few new things I’ll list
Coolant temp sensor, TPS sensor, fuel filter, spark plugs, plug wires, cap, rotor, air filter, egr, 02 sensor, flushed the coolant, changed tranny fluid, rebuilt tbi and fuel pressure regulator, made sure timing was set to zero with the wire disconnected before reconnecting it and I have no check engine codes. Any ideas on why it’s still running a bit sluggish and picks up a bit more power if I blip the throttle. Also has a very subtle stumble off idle if I give it a good blip. If I floor the pedal the van doesn’t seem to come to life and pick up speed like I think it should just kind of slowly gets up to speed. 140k on the odometer. it is drivable and will get up to highway speeds around 75 mph it’s like driving a ship through the atmosphere so I don’t really go past that just seems like something is off.
To date I’ve installed a few new things I’ll list
Coolant temp sensor, TPS sensor, fuel filter, spark plugs, plug wires, cap, rotor, air filter, egr, 02 sensor, flushed the coolant, changed tranny fluid, rebuilt tbi and fuel pressure regulator, made sure timing was set to zero with the wire disconnected before reconnecting it and I have no check engine codes. Any ideas on why it’s still running a bit sluggish and picks up a bit more power if I blip the throttle. Also has a very subtle stumble off idle if I give it a good blip. If I floor the pedal the van doesn’t seem to come to life and pick up speed like I think it should just kind of slowly gets up to speed. 140k on the odometer. it is drivable and will get up to highway speeds around 75 mph it’s like driving a ship through the atmosphere so I don’t really go past that just seems like something is off.
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