First, let me qualify this post: This fix is for most BOSE amp boards in C4 Corvettes. If your amp board doesn\’t look similar to the one shown below, yer outta luck. From my experience (and that of others) I give this fix a 70% success rating. I CAN\’T POSSIBLY GUARANTEE THIS WILL FIX ALL […]

http://www.the-reeds.com/optispark_conversion.htm The Optispark is the distributor that was installed on all late model LT1′s and LT4′s. This distributor was installed on : 1992 – 1996 LT1/LT4 Corvettes (Y-Body) 1993 – 1997 LT1/LT4 Camaro’s, Trans Ams (F-Body) 1994 – 1996 Fleetwood (D-Body) 1994 – 1996 Impala, Caprice, Roadmaster (B-Body) The concept of the Optispark was a […]

How to Adjust your Early C4 TPS and Idle Speed by Lars Grimsrud SVE Automotive Restoration Musclecar, Collector & Exotic Auto Repair & Restoration Broomfield, CO Rev. New 6-15-00 This tech paper will discuss the procedure for correct adjustment of the Minimum Idle Speed and for adjustment of the Throttle Position Switch (TPS) on the […]

You can make the LT1 \’92-\’94 Optispark setup more reliable than a �95-�96, even with the early distributor configuration. Buy a $12 \’96 GM Vette distributor vacuum harness assy. Buy a $4 clear plastic fuel filter. Buy a $3 tube of premium black Permatex RTV, because it withstands the highest temps. Reserve a long day […]