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K75 - Cold throttle hesitation - stumble. Wed Jul 20, 2022 2:38 pm
cobaltc4s
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'92 K75, 15K miles. Throttle response hesitation when engine is cold (sputters, coughs, hesitates). Runs fine after warm up. Ambient air temp has no effect (same result - summer 90F, winter 40F). >> All rubber replaced, includes fuel system, pump, lines, filters, injectors sp. plugs etc. >Replaced MAF sensor. >Adjusted valves. >Adjusted and synced intakes. >Checked and secured all electrical connections. >Checked idle circuit. >Removed, cleaned, plug wires. >Replaced water temp sensor.
Next stop Coils and Plug Wires.
What have I missed? Suggestions, thoughts? - THX
Next stop Coils and Plug Wires.
What have I missed? Suggestions, thoughts? - THX