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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Running rough

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Old Mar 29, 2018 | 10:48 AM
  #1  
Bordelon's Avatar
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Running rough



I got a 96 f150 straight 6 300 5speed manual that was running ok but not perfect so I gave it a tune up spark plugs and wires but and in the process of doing that I snapped a vacuum line and I fixed that but now the truck is running worse than before I also changed cap ,rotor and ignition coil thinking that was the problem but it was not i need help to fix it it’s my only way to work and high school
 
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Old Mar 29, 2018 | 11:55 AM
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Bad Bad Leroy Brown
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Do you have mass-air?
 
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Old Mar 29, 2018 | 12:40 PM
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From: Houston/Sugar Land
Originally Posted by Bordelon


I got a 96 f150 straight 6 300 5speed manual that was running ok but not perfect so I gave it a tune up spark plugs and wires but and in the process of doing that I snapped a vacuum line and I fixed that but now the truck is running worse than before I also changed cap ,rotor and ignition coil thinking that was the problem but it was not i need help to fix it it’s my only way to work and high school
Need more info about when it runs rough and any details like at idle or a certain speed etc. . First you need to run codes to see what is going on. There is info in here and online how to get codes through your check engine light. Do that for sure so we can help you. Sandy
 
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Old Mar 29, 2018 | 12:59 PM
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From: Kentucky
Originally Posted by sandymane
First you need to run codes to see what is going on. There is info in here and online how to get codes through your check engine light. Do that for sure so we can help you. Sandy
The paper clip method will not work on a 1996 F150/Bronco, they are OBD-II. Requires a code reader.
 
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Old Mar 29, 2018 | 12:59 PM
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Originally Posted by Bad Bad Leroy Brown
Do you have mass-air?
Yes, the OP's truck will be Mass Air.
 
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Old Mar 29, 2018 | 01:56 PM
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since things are worse than when you started, i would, in no particular order ...
check for additional vacuum line breaks;
check that you have re-installed the spark plug leads correctly;
check that the distributor cap is seated correctly (what brand of parts did you get, by the way ?).

as stated, describe how and when it runs poorly.
 
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