Timing Bump, now Bucking
02-18-2018, 08:46 PM
#1
Timing Bump, now Bucking
Finished up the “6 litre tune up” to my F150 yesterday. I put the base timing to 13/13.5 degrees (with SPOUT out). Yesterday the truck ran fine and hard! Ran around town today and during very low/very hard acceleration, the truck ran great. But as soon as I get to cruising speed, the truck will buck very hard, like almost just dropping the clutch jerk. Should I retard timing? Or am I looking at something worse such as the cam gear going out?
02-18-2018, 10:27 PM
#2
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Location: Memphis, TN, Earth, Milky Way
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I'd start by setting the timing back where it goes.
02-19-2018, 05:22 AM
#3
02-28-2018, 10:40 AM
#4
Update, after regapping all plugs to near stock gap, and backing the time down to 10 degrees, it still did not fix it. Changed ignition coils and still no luck. All along it was the faulty MSD cap and rotor. Put a nice, new Motorcraft cap and rotor on it and it works great! Even bumped the timing back up to about 12-12.5 and helped out the truck a lot.