east302
Full Access Member
Yeah, that’s what the Delco site shows as well.
There’s a TSB somewhere out there that spells it all out, but I’ll be damned if I can find it. It’s like the remote for the tv.
Recent weirdness
- Thread starter liquify33
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Yeah, that’s what the Delco site shows as well.
There’s a TSB somewhere out there that spells it all out, but I’ll be damned if I can find it. It’s like the remote for the tv.
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liquify33
Full Access Member
To add even more confusion to the spark plug mix the ones I linked and ordered from Amazon in November now says Does Not Fit. They did then and the reason I ordered them was this thread:
https://www.tahoeyukonforum.com/threads/spark-plugs.34834/#post-409479
Sunlit disappeared before my time here but his posts often come up in my research. I’ll hit up a local store and put eyeballs on some Delco platinums.
Now I’m wondering if the fuel cleaner was cleaning the fouling off the plugs like the video from 2018 I linked earlier. Same symptoms down to the cylinder though my idle is good. Disappointing but better than a fuel pump or replacing that damn pressure regulator again.
https://www.tahoeyukonforum.com/threads/spark-plugs.34834/#post-409479
Sunlit disappeared before my time here but his posts often come up in my research. I’ll hit up a local store and put eyeballs on some Delco platinums.
Now I’m wondering if the fuel cleaner was cleaning the fouling off the plugs like the video from 2018 I linked earlier. Same symptoms down to the cylinder though my idle is good. Disappointing but better than a fuel pump or replacing that damn pressure regulator again.
Sometimes you just can't win. One thing one day and another the next. "Dammit Jim, I'm a doctor not a scientist"!
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liquify33
Full Access Member
@swathdiver
LT was around +9-10% today at 75 up and down the highway. ST was 5ish depending on up or down the overpassed.
Idle, both were close to 0
swathdiver
Full Access Member
Well, I don't think anything is wrong there with those numbers but mine behaves the opposite. At idle my trims run in the negative and they zero out or near so once a steady speed is achieved. But we're dealing with different generation engines here and I'm less familiar with yours.
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liquify33
Full Access Member
A black bear tune is on the wishlist but I feel it would be better to get ignition sorted first. Fairly certain I installed LS generation plugs on a Vortec.
I’ll have new plugs in Sunday, weather permitting. At the very least I’m going to pull a couple for eyeball inspection.
swathdiver
Full Access Member
I thought that about the plugs but do not know what they are running. Let me see...
swathdiver
Full Access Member
ACDelco lists these:
#14 Rapidfire, 41-902 Double Platinum, 41-993 Iridium, R44LTS6 Conventional
All are gapped to .060"
If this were mine, I'd pick one of the latter two.
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liquify33
Full Access Member
The ones I pulled were the LTS6
Oreilly down the street has em.
ETA: it’s got 41-993’s now but .040
swathdiver
Full Access Member
If you are handy with pliers and feeler gauges, you can re-gap them to .060" without putting pressure on the electrodes. I bet that is the source of the misfires.
