1985 Engine Tune-Up Specifications
|
RPO |
Cyls-CID (Liters) |
Spark Plug Type(1) |
Spark Plug Gap (Inch) | Ignition Timing | Fuel Pressure (psi)(2) |
Idle Speed(3) |
||
| MT | AT | MT | AT | |||||
| LG4 (H) |
8-305 (5.0L) |
R45TS | 0.045 | 6B | 6B | 4-6.5 | 750 | 550 |
| L69 (G) |
8-305 (5.0L) |
R45TS | 0.045 | 6B | 6B | 4-6.5 | 750 | 500 |
| LB9 (F) |
8-305 (5.0L) |
R43TS | 0.045 | - | 8B | 40-47 | - | 500 |
Firing Order: 1-8-4-3-6-5-7-2
NOTE: Under hood sticker figures must be used if different from this chart.
(1) AC Delco noted or equivalent
(2) Key on, engine off.
(3) Or Minimum Air; RPM w/ engine in Neutral (MT) or Park (AT) warmed to operating temperature; follow proper procedures in setting.
MT=Manual Transmission; AT=Automatic Transmission; psi=Pounds per Square Inch
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