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Closed loop drop cylinders

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Old Jan 1, 2024 | 06:12 PM
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Default Closed loop drop cylinders

When it switches from open to closed loop it drops the two front cylinders each side. So 1,3 and 2,4. Read about o2s but the state the full bank so right or left. Mine is two cylinder each side. Back ground. Ls1 t56 in hot rod. Ran perfectly. Replaced clutch reinstalled engine. This problem started. Replaced o2s. No fix. Changed plugs and wires. No fix. Replaced crank position sensor. No fix. Weird!?! Any help thanks
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Old Jan 2, 2024 | 07:34 AM
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Wrong forum.
Try the tune/diagnostics for help.
Also, post the tune and a data log of what's going on.
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Old Jan 5, 2024 | 01:21 PM
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Originally Posted by phunt
When it switches from open to closed loop it drops the two front cylinders each side. So 1,3 and 2,4. Read about o2s but the state the full bank so right or left. Mine is two cylinder each side. Back ground. Ls1 t56 in hot rod. Ran perfectly. Replaced clutch reinstalled engine. This problem started. Replaced o2s. No fix. Changed plugs and wires. No fix. Replaced crank position sensor. No fix. Weird!?! Any help thanks
Please explain what "drops the two front cylinders" means. They stop firing? How do you know? Maybe just too lean to run properly.
Sorry to be critical, but over 150 people read your post, none replied, partly because things like "Read about o2s but the state the full bank so right or left" is just a random sequence of words and therefore not worthy of a reply.
As moderator I try to get every question answered to some extent.

Now, to try to help you, have you looked at the O2 voltages with a scanner? I think the experts here will want to see those voltages and read a clearer explanation of what is going on. Something happened when you re-installed the engine; perhaps the engine harness got damaged.
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Old Jan 6, 2024 | 12:31 AM
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Originally Posted by mrvedit
Please explain what "drops the two front cylinders" means. They stop firing? How do you know? Maybe just too lean to run properly.
Sorry to be critical, but over 150 people read your post, none replied, partly because things like "Read about o2s but the state the full bank so right or left" is just a random sequence of words and therefore not worthy of a reply.
As moderator I try to get every question answered to some extent.

Now, to try to help you, have you looked at the O2 voltages with a scanner? I think the experts here will want to see those voltages and read a clearer explanation of what is going on. Something happened when you re-installed the engine; perhaps the engine harness got damaged.
You do realize that sometimes the bots glitch, right?
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Old Jan 6, 2024 | 06:22 AM
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Trolls do also!
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Old Jan 6, 2024 | 11:51 AM
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It's hard to tell the difference between bots, trolls and complete morons anymore.

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