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Small miss @ idl, (only with esc wire connected)

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Old 05-23-2018, 12:11 AM
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Small miss @ idl, (only with esc wire connected)

86 w/ 350 swap tpi has a slight miss, sounds like popcorn out the exhaust but runs ok..
but it only misses when the esc wire is connected, with it unplugged it runs very smooth(no miss)

so i believer that puts it around i need a new esc/ or knock sensor..

maybe they never swapped that out when they did the 305 to 350 swap?

any ideas?
Old 05-23-2018, 04:47 PM
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Re: Small miss @ idl, (only with esc wire connected)

Any ideas?
Old 05-23-2018, 05:08 PM
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Re: Small miss @ idl, (only with esc wire connected)

Could be too advanced reset timing with the ESC disconnected
Old 05-23-2018, 05:19 PM
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Re: Small miss @ idl, (only with esc wire connected)

With it disconnected its at 6* tdc
Old 05-23-2018, 05:29 PM
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Re: Small miss @ idl, (only with esc wire connected)

sensor then.
Old 05-23-2018, 06:11 PM
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Axle/Gears: 3.27 POSI 9 BOLT
Re: Small miss @ idl, (only with esc wire connected)

Originally Posted by mmadden55
sensor then.
what sensor?
the knock sensor? Or the esm or icm?
Old 05-24-2018, 07:46 AM
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Re: Small miss @ idl, (only with esc wire connected)

Or perhaps ill play with the timing?

wouldnt the timing be different on a lower compression gm goodwrench 350? Its cam is the larger one.(not like it matters with the 76cc heads)
but would 6* still be the base for that?
or would it be lower or higher due to high and low compression?
Old 05-24-2018, 10:21 PM
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Axle/Gears: 3.27 POSI 9 BOLT
Re: Small miss @ idl, (only with esc wire connected)

Could this be the problem?
Old 05-25-2018, 12:57 PM
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Re: Small miss @ idl, (only with esc wire connected)

Bump
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