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94 5.0 bucking over 4000rpm

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Old 05-01-2008, 06:25 PM
  #1  
drew94stang
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Default 94 5.0 bucking over 4000rpm

I HAVE A 1994 5.0 AND WHEN YOU GET ON IT WHEN IT REACHES 4000 RMP IT STARTS TO BUCK LIKE THE REV LIMITER IS KICKING,RESULTING IN LACK OF POWER AT THAT POINT,IT RUNS AND DRIVES FINE UNTIL THAT TIME,IT'S NOT THE TRANNY BECAUSE IT DOES IT IN EVERY GEAR,I'VE REPLACED MASS AIR SENSOR AND EGR VALVE AS THOSE CODES WERE COMING UP IN COMPUTER,COULD SOMEONE PLEASE HELP ME WITH THIS.THANKS
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Old 05-01-2008, 07:26 PM
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mjr46
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Default RE: 94 5.0 bucking over 4000rpm

make sure the spout connector that is removed to set base timing has not fallen out
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Old 05-01-2008, 07:27 PM
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mjr46
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Default RE: 94 5.0 bucking over 4000rpm

also a bad cap, rotor, coil wire and or coil can cause such..has it had a complete tune up lately??
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Old 05-01-2008, 07:39 PM
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drew94stang
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Default RE: 94 5.0 bucking over 4000rpm

all plugs and wires are new,i'm going to get a tfi mdule and see if that fixes it if not i'll try a new coil also.
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Old 05-01-2008, 08:17 PM
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mjr46
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Default RE: 94 5.0 bucking over 4000rpm

ORIGINAL: drew94stang

all plugs and wires are new,i'm going to get a tfi mdule and see if that fixes it if not i'll try a new coil also.
personally I 'd try running a koeo/koer test and check for codes
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