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

5

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

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

19,395

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

5

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

19,395

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 out of 3 people think this is helpful.
5

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

19,395

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.

5

Where under the dash?

19,395

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

1 out of 1 people think this is helpful.

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