Evening guys.
I wondered if anyone had any ideas or suggestions.
I've been playing with my 16188051 LT1 tune and it's developed a wild surging idle. Just about all the data is surging up & down. Old tune still does it.
NO Fault codes
I've also had my "Check guages" light flickering on and off. Just yanked cables behind drivers side of the intake and it went out so I need to chase that but the surge still persists.
Car warms up ok to 80C then goes crazy with surge.
IAC swings 80-140 but i can't tell if it's fighting it or causing it. IAC isn't that old
I'm not quite 100% certain it isn't the tune but an old tune which passed the emissions does it.
I've also switched injectors back to a previous set and can't rule them out yet also *** More likely these than the tune but they didn't do this when I first swapped them.
TIA
Mitch
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