Pinging
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Joined: Dec 1998
Posts: 44
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From: Saint Peters, MO USA
Pinging
FYI:
If you have pinging problems (especially at WOT) with no fault codes stored (Check Engine Light ON) and no other obvious defects (need tune up, plug wires, vacuum leaks, etc.), I may have your answer.
Find the octane short bar located between the battery and firewall just forward and above the spot where the ECM enters the passenger compartment. It is taped to the wiring harness. Remove the jumper. This retards base timing 3-4 degrees. Apparently, this adjusts the engine's base timing for variations in fuel octane and/or quality.
This solved my pinging problems completely with no noticable affect on drivablility. I found this "fix" at my local library in the Haynes manual applicable to my vehicle.
Happy Holidays
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98 F-150 4X4 Ext Cab ORP 4.6L Superchip, Gibson Cat Back Single exit exhaust, TransGo Performance Shift Kit, K&N Filter. Future: 4.56 gear swap, shorty headers.
[This message has been edited by wschubbe (edited 12-11-1999).]
[This message has been edited by wschubbe (edited 12-11-1999).]
If you have pinging problems (especially at WOT) with no fault codes stored (Check Engine Light ON) and no other obvious defects (need tune up, plug wires, vacuum leaks, etc.), I may have your answer.
Find the octane short bar located between the battery and firewall just forward and above the spot where the ECM enters the passenger compartment. It is taped to the wiring harness. Remove the jumper. This retards base timing 3-4 degrees. Apparently, this adjusts the engine's base timing for variations in fuel octane and/or quality.
This solved my pinging problems completely with no noticable affect on drivablility. I found this "fix" at my local library in the Haynes manual applicable to my vehicle.
Happy Holidays
------------------
98 F-150 4X4 Ext Cab ORP 4.6L Superchip, Gibson Cat Back Single exit exhaust, TransGo Performance Shift Kit, K&N Filter. Future: 4.56 gear swap, shorty headers.
[This message has been edited by wschubbe (edited 12-11-1999).]
[This message has been edited by wschubbe (edited 12-11-1999).]