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 Hood, A high quality, OE replacement hood; Backed by 1-year, unlimited-mileage warranty..||$198.71|
|1974 Ford F-250 Pickup Side Marker, Front, Driver Or Passenger Side, Bulbs not included; DOT and SAE approved; A high quality, OE replacement side marker light; Backed by 1-year, unlimited-mileage warranty..||$13.73|
|2015 Ford Taurus Mirror Cover Replacement Shell, Mirror Cover Replacement Shell; Chrome; 10-11 Ford Taurus, , .||$53.50|
|1974 Ford F-250 Pickup V8, 5 L, 302 CID Rebuilt Engine, Dipstick In Timing Cover. No Smog., Warranty: 3-Year/100,000 Mile, .||$1,371.00|
|1980 Ford F-250 Pickup Used Headlamp Door/Cover, Driver Side, Chrome, ARGENT TRIM\ NEW TKO, Very Good.||$69.00|
|1978 Ford F-250 Pickup Used Parking Lamp, Driver Side, PARKLAMP/TURN SIGNAL; (BELOW HDLP), Good.||$56.00|