What are the best spark plugs to prevent rough idle for a 1998 Chevrolet silverado 5.7?

35

Asked by Oct 12, 2014 at 11:10 PM about the 1998 Chevrolet C/K 1500 Cheyenne Extended Cab LB

Question type: Maintenance & Repair

11 Answers

17,440

Ac delco. Always ac delco with gm vehicles.

3 out of 3 people think this is helpful.
32,015

Options are like noses. Everybody's got one.

17,440

Michael Jackson didn't. LOL

3 out of 3 people think this is helpful.
35

Thank you and ha funny

1 out of 1 people think this is helpful.
32,015

If you think about it, T.A. Michael Jackson had quite a few. Including the one he kept in his pocket.

1 out of 1 people think this is helpful.
60

The split fire ones should be good for it. Always worked for me.

17,440

BoholMark, true, very weird and a lil twisted but, true. BAHAHA

135

I recommend AC Delco. If you have a rough idle unless the plugs are very old 50K plus miles, I would suspect a problem with something else. do you have any engine lights coming on? Other than a misfire from plugs, wires, cap - etc, it could be fuel mix/delivery. Check for vacuum leaks...

1 out of 1 people think this is helpful.
11,855

Any top manufacture makes good plugs. Just make sure they are for the heads you have. When I had my Edelbrock aluminum heads put on my Corvette, the reach needed to be longer over the stock GM iron heads. The poor little guy who put the plugs in, put in what GM called for in the stock heads. I was detonating inside the plug hole. It worked, but could of ruined the new $ heads. Clean the plugs, gap them correctly, and see if that helps. Next would be fuel flow, then electronics to check. Wires also wear out sometimes through heat, oils, fumes or wear and tear on the wires.

1 out of 1 people think this is helpful.
35

Yes I have the check engine light on & it gives me the code P0300 which is a misfire but I also got the code P0174 system too lean bank 2 by the way I changed to new fuel filter new spider injectors new rotor and distributor cap , I was told to change the spark plugs ,, any ideas

1 out of 1 people think this is helpful.
17,440

Plugs and plug wires both.

2 out of 2 people think this is helpful.

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