The Optispark is your distributor. It routes the power from the ignition coil to your spark plugs.
the dealership will quote about $600.00 for the optispark alone. they quote 10hrs at 60.00 shop/hr
Odds are you have an optispark unitl. If so it is under the water pump on the front of the engine. Look up optispark replacement on LT1 or C4 Corvette.
Probably an issue with the optispark
The 96 Impala LT1 uses an optispark ignition system in which timing is controlled by the PCM (Computer). In order to change the timing you would need to use a computer, cable, and a tuning program such as PCM4Less or Tunercat. The Optispark mounted on the front of the engine is non adjustable for timing controls. The timing is controlled by the PCM sending signals to the ignition control module located adjacent to the coil on the passenger head.
you dont! the computer controls the optispark completly...
Yes, it is located behind the balancer, all the plug wires lead to it. The distributor for all 92-97 Camaros, Firebirds, and Corvettes with the 5.7L LT1 motor is called an Optispark distributor, unlike most conventional ignition distributor designs, the optispark design uses an optical sensor and a trigger disc to send the ECM a high and low pulse signal. Located directly under the waterpump, the optispark dose require a fair amount of labor for removal. There are many options available for LT1 owners when it comes to replacing their malfunctioning Optisparks. The guys at www.all-ignition.com are the foremost experts on this particaluar ignition system and have the largest selection on Brand New Optispark distributors. They provide excellent tech support on install questions and general info on the optispark distributors.
The Optispark distributor is notorious for causing this problem.
The distributor is called an optispark, and is located on the front of the engine behind the water pump.
u need a new OPTISPARK
The problem could be your optispark distributor. They have a tendency to corrode inside and when this happens, it hinders the performance to the point that acceleration is greatly hampered. A bad optispark will also cause starting issues and engine misfires. Besides the optispark, check for a vacuum leak. Intake manifold leaks are very common on the LT1, as well as valve cover gasket leaks.
The optispark distributor which was used on GM LT series engine is on front of engine below water pump
dirty injectors