Why is my engine pinging?
Ford Owner
Joined: Aug 2012
Posts: 1,073
Likes: 138
From: Wichita Kansas
I know the radiator is not original so I would rather not replace that. I'll flush it and run it with water for the summer then flush it and add anti freeze for the winter and hopefully that will clean it out enough.
The gauge stays at the O in normal it's just the first time warming up it goes to the L in normal then drops
Would you replace the thermostat too? What temp thermostat?
The gauge stays at the O in normal it's just the first time warming up it goes to the L in normal then drops
Would you replace the thermostat too? What temp thermostat?
The anti freeze is also a coolant and you should always run coolant in your system to prevent overheating and prevent corrosion. If you don't want to do it yourself, take it in and have it flushed for around $100. It is money well spent. Of course, make sure you don't have any bad hoses or leaks before you spend money on flushing the cooling system.
Junior Member
Joined: Feb 2012
Posts: 20
Likes: 5
From: Louisiana
Possible induction crossfire? I had similar issue with several non-roller 5.0L's.
TSB 94-4-10
LIGHT TRUCK: 1987-1994 BRONCO, E-150, E-250, F-150, F-250
ISSUE:
Engine miss, spark knock, buck/jerk, surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly routed spark plug wires.
ACTION:
If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires if required.
FIRING ORDER
The firing order for 1987-1993 (non-roller) vehicles is 1-5-4-2-6-3-7-8. If #7 and #8, or #2 and #4 spark plug wires are routed next to each other at the separation bracket, an induction crossfire condition can occur.
The firing order for 1994 vehicles is (roller) 1-3-7-2-6-5-4-8. On these vehicles the #1 and #3, or #5 and #6 spark plug wires must be separated to eliminate the possibility of an induction crossfire.
To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap.
TSB 94-4-10
LIGHT TRUCK: 1987-1994 BRONCO, E-150, E-250, F-150, F-250
ISSUE:
Engine miss, spark knock, buck/jerk, surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly routed spark plug wires.
ACTION:
If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires if required.
FIRING ORDER
The firing order for 1987-1993 (non-roller) vehicles is 1-5-4-2-6-3-7-8. If #7 and #8, or #2 and #4 spark plug wires are routed next to each other at the separation bracket, an induction crossfire condition can occur.
The firing order for 1994 vehicles is (roller) 1-3-7-2-6-5-4-8. On these vehicles the #1 and #3, or #5 and #6 spark plug wires must be separated to eliminate the possibility of an induction crossfire.
To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap.
Senior Member
Joined: Aug 2010
Posts: 2,669
Likes: 116
From: Long Beach, CA
High octane doesn't ping because it burns slowly. Slow burns cool cylinder chambers. The 302 was designed for 87 octane. Higher ratings will burn too slowly releasing less energy and leaving unburned fuel to create deposits which will in turn increase detonation. You still have the 3 main probable causes. Carbon deposits, poor air fuel ratio or high heat.