Anyone Else?
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New User
Joined: Jan 2009
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Anyone Else?
I have a '91 F-150 w/ 4.9L(300) Mazda 5 speed. Idles fine for the most part she runs fine. Difficult when starting, about 4 tries till go.
New plugs, wires, cap, rotor, TFI, coil, tps, IAC, EGR, MAP, clutch, starter, alternator, and battery.
When sitting still and depressing the excelerator pedal, it will rev just fine to say 3500-4000. The problem starts as I'm driving, when excelerating to shift around 2500-3000 rpm it will "chuck and buck violently". It does this through all the gears. Then when cruising its sort of ok, but when I let off the pedal, it wants "chuck and buck again".
Please tell me someone else has experienced this and knows the cure.
New plugs, wires, cap, rotor, TFI, coil, tps, IAC, EGR, MAP, clutch, starter, alternator, and battery.
When sitting still and depressing the excelerator pedal, it will rev just fine to say 3500-4000. The problem starts as I'm driving, when excelerating to shift around 2500-3000 rpm it will "chuck and buck violently". It does this through all the gears. Then when cruising its sort of ok, but when I let off the pedal, it wants "chuck and buck again".
Please tell me someone else has experienced this and knows the cure.
Elder User
Joined: Oct 2008
Posts: 708
Likes: 1
Sounds to me like might be a timing thing. Try unplugging your SPOUT connector and see what happens. You will lose power cause your timing will be 10 BTDC at all RPM, but maybe it will help diagnose. Then put that back in and then unplug the knock sensor. It's on the side of the block under the the distributor and coil. Then drive around again. Good luck.
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smcguire2001
1997 - 2006 Expedition & Navigator
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Jun 6, 2010 04:08 PM
