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Author Topic: No vac dizzy  (Read 9644 times)

Offline Chevygold

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Re: No vac dizzy
« Reply #30 on: April 22, 2024, 05:18:32 AM »
Fired up the truck on the old home made Chinese plug leads and all was good so then I decided I'd fit the Accel leads that came with the MSD and now my tacho is dancing all over where with the old leads it was steady, seems to steady up once the revs get up a bit but at idle it's crazy!

Graham
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Offline Mike81K10

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Re: No vac dizzy
« Reply #31 on: April 22, 2024, 02:28:51 PM »
Replace the old leads one at a time with the Accel leads. When it starts acting up - you will know which is bad. Could just be a bad crimp!
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"Tell me and I forget. Teach me and I remember. Involve me and I learn." -Benjamin Franklin

Offline JohnnyPopper

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Re: No vac dizzy
« Reply #32 on: April 22, 2024, 06:57:09 PM »
Sounds like your tacho is dizzy  8)
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1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline bd

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Re: No vac dizzy
« Reply #33 on: April 22, 2024, 07:23:01 PM »
Dem little green leaves in dem dizzy tachos aint cilantro, my friend!!   WooHoo!!!    ;D
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Chevygold

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Re: No vac dizzy
« Reply #34 on: April 25, 2024, 03:50:48 PM »
It's got me that dizzy I've gone back to getting the interior back together, could do with some of that herbal mixture to cure my headache!
Graham
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Offline Chevygold

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Re: No vac dizzy
« Reply #35 on: April 25, 2024, 04:01:47 PM »
Think I'll put my diagnostic rig on and see what the traces look like on the screen for each cylinder.
Graham
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Offline VileZambonie

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Re: No vac dizzy
« Reply #36 on: April 28, 2024, 05:59:04 AM »
Double check the firing order. Make sure you didn't cross 5&7
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Chevygold

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Re: No vac dizzy
« Reply #37 on: April 29, 2024, 09:30:17 AM »
Pretty sure FO is good, I checked double checked and then checked again just to be sure but will look again, one thing I noticed was all was good at first start but after running for 5-10 minutes the dancing tacho started again, above 2500 it's steady again then back to idle and back to its tricks again.

Graham
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Offline Chevygold

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Re: No vac dizzy
« Reply #38 on: June 06, 2024, 04:10:55 PM »
Finally escaped home maintenance duties to have another look at this, yes firing order all correct, ran diagnostics and found using the cylinder cut test 5 and 6 cylinders were doing very little, changed out the plug leads on 5 and 6 for known good ones will go for a road test next and see how it goes, still got the dancing tacho though :-(
Graham
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Offline VileZambonie

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Re: No vac dizzy
« Reply #39 on: June 06, 2024, 05:38:36 PM »
I love cilantro
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Chevygold

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Re: No vac dizzy
« Reply #40 on: June 08, 2024, 04:49:35 AM »
Never heard corriander called that, Google is your friend!
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Offline bd

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Re: No vac dizzy
« Reply #41 on: June 08, 2024, 09:48:59 AM »
Different parts of the same plant.  The plant is called coriander.  In cuisine, cilantro generally refers to the leafy parts of the plant; coriander typically relates to the seeds from the plant.  Each has its unique flavor and usage.

But, we diverge...    8)
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Mike81K10

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Re: No vac dizzy
« Reply #42 on: June 08, 2024, 11:01:51 AM »
Google is not actually our friend, they manipulate peoples searches with naferous codes.
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"Tell me and I forget. Teach me and I remember. Involve me and I learn." -Benjamin Franklin

Offline VileZambonie

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Re: No vac dizzy
« Reply #43 on: June 08, 2024, 06:14:49 PM »
Quote from: Mike81K10 on June 08, 2024, 11:01:51 AM
Google is not actually our friend, they manipulate peoples searches with naferous codes.

Google, used to be your friend. Those days are gone!

Next time you make nachos, I dare you to dump a bunch of coriander seeds on it instead.   ;D
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                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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