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Found 6 results

  1. (I searched the forum to no good answer) My 2015 CCSB 4WD Silverado 1500 L86 6.2L has about 65,000 miles on the clock. I’m considering replacing the spark plugs and wires during my next maintenance day. It is not missing, but the idle isn’t as smooth as it has been, it might have a tiny pause upon acceleration. I’m pretty conscientious regarding maintenance and have serviced the intake/fuel system regularly, so this seems like a logical progression in scheduled maintenance. No big engine mods done, intake and a muffler is about all. 1. Is it appropriate at this mileage and hours/age? 2. Which products have you used and why. 3. Costs and potential bargains. 4. Tips or Tricks to make the process easier or provide a better outcome. thanks for your input and sharing your experience. If you recommend parts, try and include parts numbers. Thank you, Dark.
  2. Removing the spark plugs and wires. they are originally 9.5in long but the new ones I got off of rock auto are 12.5in long. Is that fine or should I return then and get 9.5in long?
  3. I've got a 2015 sierra slt 4x4 with a P1X procharger setup on it and I'm currently running NGK 6510 iridium spark plugs. I'm constantly having issues out of the spark plugs when I build boost it starts missing, the boost is blowing the spark off the plugs a little causing it to miss on the top end because it isnt grounding out properly. Just looking for a good copper/nickel plug recommendation around the same heat range that mine are, I'm tired of these plugs and can't seem to find any that will work. Thanks!
  4. Hi group. I own a 98 GMC Sierra SLE K1500 5.7 Vortec. It's got over 220,000 miles, I recently did a major tune up. Plugs, wires, cap, rotor, oil, oil filter, air filter, cabin filter... It's been running like a top, for over 9 months. I started it the other morning after it was of all night, & it idled like crap. I shut the porch lights off & looked under the hood, it looked like the 4th of July. Sparks are running up & down the wires & all over. I know the wires are in the correct order because I only pulled them one at a time to replace them. The same with the plugs, & they are properly gapped. The cap & rotor will only go on one way. The wires are lifetime warranty & I replaced them last night. Yet it still is running like crap. Anyone got any ideas?????...
  5. I'm in need of some serious help: So I've had a heck of a time trying to get my 03 Envoy to run properly. I've been experiencing a misfire, when it gets to about 80 km/h and 1500-2000 rpm's the misfire is pretty bad until I accelerate over 2000 rpm and then it runs fine until I fall under 2000 rpm again. I brought the envoy to a shop and they said it was some pedal sensor or something which I paid $300 for the part and labour to have it replaced. Nevertheless the problem didn't go away. I ended up thinking it might be the spark plugs because they hadn't been changed since I've owned the vehicle. I replaced three of them (cylinders 2,3,4). The threads of the old ones were covered with oil and looked terrible. I had to go somewhere so I planned to do the other three the next day. After installing the 3 the envoy ran better and still had a misfire but not as bad. The next day I installed the other three, one of the plugs had the insulation casing cracked on it. I only realized after pulling the plug out. I looked into the hole and saw the little missing piece sitting over the plug hole. I vacuumed the piece out and I'm pretty sure I got it out. I heard it go through the central vac hose but I couldn't find it in the central vac tank so I don't know what happened. Once I installed those three plugs (cylinders 1,5,6) I started up the envoy and it was bad. It was making a very loud knocking sound and I immediately turned it off thinking I didn't want to do any damage. I tried to start it after that and it wouldn't turn over. Today I turned it to use an OBD II scanner and it started up but still had the very loud knocking. The scanner said there was a misfire in cylinders 4,5, AND 6. I'm completely lost as to why all three would show a misfire considering 5 and 6 at a different time as 4 and the spark plugs are all the same. I realized tonight after pulling out one of the new spark plugs I got that they are different from the original. The thread is about 1/4" longer and the overall spark plug is 1/4" longer. I looked online and it says this is the right spark plug and the parts store is the one who gave it to me so I'm not sure if this is normal or what. The old spark plugs were AC Delco 41-981 and the new ones I got are Champion 7437. If anyone knows of what could be the problem please let me know. I would greatly appreciate it. I just wanted to fix a misfire and thought changing the spark plugs could do no harm but clearly not. Thanks
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