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Cold Start issue with my 83 280ZX


FrostyZX

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So my 1983 280ZX 2+2 is having cold start issues. when i turn it on it idles up real high like 900-1000rpm and if i touch nothing after a few seconds the rpms drop and it stalls out. If i crank it and pump the gas it will stay on and not stall out but if i just floor the pedal instead of pumping it it will stall out also the is a quiet backfire that sounds like it comes from the engine area. The reason im calling this a cold star issue is because if i pump the gas long enough for the motor to warm up to running temp i can let go of the gas and it will idle fine at 800-900rpms it revs smooths and sounds good.

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