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VT 3.8 slight miss

GMDriver

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azzaVT

Short answer is no, After new o2 sensors it didn't make much difference...
I also replaced the inlet manifold gasket,
Some days it would seem better than others
I just last week replaced the coil packs with the elec ignition , this seems to have helped., idles much smoother even with aircon running.
I found I was getting code 43, which is for the knock sensors so I just replaced those too, what a pain in the ass to get to.

The thing is still pissing me off.
I still have DTC 43 with new knock sensors, also 57, & 92.
I know what the codes represent but fixing the causes seem to be a real issue....
 

GMDriver

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so it turned out the top end was noisy/rattling, & low on compression,
Put in a VY engine & rewired the knock sensors to ECU.
Goes really well again
 
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