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, Driver Or Passenger Side, Bulbs included; Sealed beam and halogen type; Round; DOT and SAE approved; A high quality, direct fit OE replacement headlight assembly; With 2 years limited Trustbuilt warranty..||$22.43|
|2011 Ford Focus Full Door Mirror Covers, Full Door Mirror Covers; 2 Piece Set, , .||$53.50|
|1985 Ford F-250 Pickup V8, 5.8 L, 351 CID Rebuilt Engine, LPG, Windsor, Smog, 6 intake manifold bolts per head. Psgr car to 85, Truck & van thru 87 with 2 barrell carb., Warranty: 3-Year/100,000 Mile, .||$1,315.00|
|1988 Ford F-250 Pickup Used Fan Clutch, 5.0, AUTO, 4X4 8-302 (5.0L), w/AC, Very Good.||$62.00|
|1990 Ford F-250 Pickup Used Steering Gear, 2.3, MANUAL, 4X2, PS Power Steering, Very Good.||$160.00|
Help me find
Search DIY repair manuals by VIN...
Need To Fix Your Car or Truck?
Try Our Repair Service Finder
Help me find