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P1124 P1126 at idle
I have a new to me 99 C2 with a CEL that keeps coming on. Originally it also included P0130 but I replaced the corresponding O2 sensor and that code hasn't come back.
I can clear it and drive around for a while but if I let it idle for a couple minutes once warm the CEL light will come on.
Typical freeze frame data is coolant 205F, speed 0, rpm 740.
My understanding is that this is too lean for the computer to correct for, on both banks. So probably a vacuum leak along the shared path.
MAF is clean
hoses/connections appear OK
no whistling sounds
I don't have access to a smoke machine and I'm not willing to spray flammable chemicals on a hot engine.
I hate throwing parts at a problem that doesn't have a positive ID but I think I may have reached a diagnostic wall where I can either pay someone to diagnose it or just take it apart along the route of engine-in AOS and see what I find.
Any ideas?
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