Auto Parts Search
Ford F-250 Pickup Engine >> IGNITION FIRING ORDER ON HO ENGINES
Ignition Firing Order On
Ford 5.0L HO (High Output) Engines
There seems to be much confusion about the firing order on Ford 5.0L HO (High Output) engines.
Contrary to the plain 5.0L engine, the HO (High Output) version uses the same firing order as the 5.8L engine. This is probably the case because early 5.0L HO engines used a 5.8L marine camshaft.
The firing order for the standard 5.0L is: 1-5-4-2-6-3-7-8. The firing order for the HO engine is: 1-3-7-2-6-5-4-8. The rotor inside the distributor rotates counterclockwise on both engines (see illustration).
Using the plain 5.0L firing order on the HO engine does work, however the engines will have low vacuum and very poor idle. At higher rpm it appears to smooth out, but is very low on horse power, not at all what the customer will expect from this potent power plant.
The AERA Technical Committee
Looking for replacement Ford F-250 Pickup engines? Visit our online Rebuilt Engines Store. Need to fix your Ford F-250 Pickup engine? Access here the comprehensive online repair guide for your Ford F-250 Pickup engine. Click Here to find a used Ford F-250 Pickup engine.
Shop online for auto body parts, engines, wheels, lights...
|1974 Ford F-250 Pickup Tail Light, Driver Side, Bulbs not included; DOT and SAE approved; A high quality, OE replacement tail light; With 1-year limited TruckEFX warranty..||$19.27|
|1974 Ford F-250 Pickup Headlight, Bulbs included; Sealed beam type; Round; DOT and SAE approved; A high quality, direct fit OE replacement headlight assembly..||$9.32|
|2006 Ford Crown Victoria 16" Aftermarket Wheel Covers, Aftermarket Wheel Covers; 16 Inch; Chrome ABS 12 Vent/ Chrome Spoke With Depression; Lug Cover Bolt-On Retention, , .||$55.50|
|1997 Ford F-250 Pickup V8, 7.5 L, 460 CID Rebuilt Engine, FI, Warranty: 3-Year/100,000 Mile, .||$1,989.00|
|1997 Ford F-250 Pickup Used Upper Control Arm, Passenger Side, 5.4, AUTO, 4X4 (thru 8500 GVW), 4x4, R., Very Good.||$62.00|
|1994 Ford F-250 Pickup Used Air Flow Meter/Sensor, 5.8, AUTO, 4X2 8-351W (5.8L, Calif & MA), Very Good.||$77.00|