i have a 97 chevy 1500 5.7 vortec and it runs choppy at idle

15

Asked by SawyerP Jan 24, 2014 at 06:33 PM about the 1997 Chevrolet C/K 1500 WT RWD

Question type: Maintenance & Repair

i have a 97 chevy 1500 5.7 vortec and it runs choppy at idle and when taking off but pulls
out of it at 1500rpms but when it shifts it boughs until 1500rpms again and at highway
speed i cant run overdrive cause it back fires and boughs and does the same thing when
going up hills until it shifts down. anyone have any ideas why it does this?

7 Answers

44,975

fuel filter, fuel pump or fuel injection spider on the engine.

1 people found this helpful.
15

filter and pump are good but haven't checked spider. what else could it be?

1 people found this helpful.
44,975

It is probably the spider. When these go bad they only send fuel to the injectors occasionally or not at all. You could have one not working or 5-6.

3 people found this helpful.
15

ok and i also don't have heat and i replaced the thermostat and heater core but still don't have heat.

44,975

You may have air in the cooling system or Blend door actuator may not be switching from cold to hot. It is under the dash.

44,975

It is in the heater box. It is either controlled by a vacuum or electrical switch.

1 people found this helpful.

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