Tune-Up - V6: Adjustments: Distributor

Starting with 1987 models, 2.8L (VIN S, W or 9) engines are equipped with the C(3)I Ignition System. This system uses: a 3-coil module along with a crankshaft reluctor and a block mounted magnetic sensor instead of a distributor.

The 3.0L MFI (VIN L) and 3.8L SFI (VIN 3 and 7) engines are equipped with C(3)I ignition. The system uses a 3-coil module with crankshaft and camshaft sensors in place of a distributor.

Models that use a distributor are equipped with the High Energy Ignition (HEI) system with Electronic Spark Timing (EST).

Fig 1: 2.8L Firing Order

Fig 2: 3.8L (VIN A) Firing Order & Timing Marks

Fig 3: 3.0L MFI & 3.8L SFI Firing Order

Fig 4: 4.3L TBI Firing Order & Timing Marks