What is your question?
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What is your question?
Engine runs normal with heater off, but begins to run rough and pulse with heater(A/C) switched on.
What makes this problem better or worse?
problem seems to get worse as engine comes up to temperature
How long has your 2003 Ford Taurus had this problem?
a few weeks
1 Reply
Hello, sounds like the air conditioning compressor engagement is affecting engine running. This could occur for a few reasons - a little load is normal from the compressor turning on, but if there is a weakness present in engine performance, then this extra load the compressor places on the engine could be accentuated. Alternatively, the compressor could have a concern which places an extra load that is abnormal causing engine performance to suffer. Hands on inspection is ultimately needed to see where the area of opportunity is for the symptoms. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.