A/c puts a heavier load on an engine, the knocking noise should be checked out immediately. Also check engine oil it may be low as you say you have a leak. Try cleaning throttle plate and iac hole with choke cleaner clean plate on both sides. Then check to see if fans are working one should come on when a/c is on. Have coolant system pressure checked because the leak of oil may also be leaking coolant. Then check radiator for cold spots if any radiator is bad.
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Thursday, March 23rd, 2017 AT 5:49 AM