Zip Corvette sales and customer service representatives are here to serve you during the following hours:
Mon-Fri. 8:00am-5:00pm
Sat-Sun: Closed
(Eastern Standard Time)
Zip’s showroom will be unavailable for walk-in shopping or order pickup. Local customers are encouraged to call us at 1.800.962.9632 to place an order with your favorite Zip salesperson. All customers can continue to shop securely online 24/7 at zip-corvette.com. Orders are shipping as usual. All in-stock parts ship same-day when your order is placed by 3pm ET Monday-Friday.
Other questions? Contact us here 24 hours a day 7 days a week.
1990-1991 Corvette knock sensor is screwed into your C4 Corvette's engine block or cylinder head and is used to detect engine knock or detonation. The information is relayed to the ECM/PCM (computer) and is used to fine tune ignition timing. A bad knock sensor can cause a faulty code to set and may also cause ignition timing to be skewed.