TotalyHucked
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- Zach
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- 1985
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- Sierra 1500
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- 5.3
^This
Spark plug gap closed fresh rebuild
- Thread starter Cdog_96
- Start date
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Craig Nedrow
NADAR UNDER THE RADAR
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- Craig
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- 1973 (have two), 1985
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- K10, K20, C20
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- 350, 454, 6.2 Detroit
I have been the recipient of much good humored help on this forum, but as a machinist, and Like Ricko says "just because it's old, doesn't mean it's bad, and just because it's new, doesn't mean its good. I knew nothing when I started, now I know that, after 60 years of wrenching, 40+ years machining, there is lots to learn. Personally if that was my engine, it would be coming apart. If something has hit the piston, I would not want to find out when a hole has developed and you are oil blowing everywhere. Happened once to me.
mlparkey
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A spark timing issue is not going to cause that. That's impact damage. The only thing that's going to impact a sparkplug electrode is the piston or something floating around in the cylinder. If you didn't drop that sparkplug before installation then there's a mechanical issue with that cylinder.
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- 350
Don't know exactly - but north of 175 psi. Take out all plugs. Crank on each cylinder with the tester installed, let it pulse 4 times. you should not see a variation of more than 10% hole to hole.
nvrenuf
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@Cdog_96 any updates?
Rusty Nail
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Meh
Cdog_96
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Sorry have been busy, I checked the cylinder and looked good with bore scope. The timing was way too far advanced, the tbi computer was putting it way out of spec. I got the timing right and all is good, plug looks good and no misfires
nvrenuf
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@Cdog_96 Glad it's running good now.
Just to say it, while setting the timing are you disconnecting the wire by the harness bulkhead connector down below the wiper motor / master cylinder? (I think it's tan /white stripe)
Just to say it, while setting the timing are you disconnecting the wire by the harness bulkhead connector down below the wiper motor / master cylinder? (I think it's tan /white stripe)
BillK
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