rough running
New User
Joined: Feb 2001
Posts: 4
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rough running
1989 F150 302 5 speed
Truck is running rough and jerking.It will jerk so hard it feels like you hit something.It has been doing this for 8 months now and the dealer can not find anything wrong.I have changed fuel filter,plug wires,cap and rotor,thermostat,pulled the plugs and checked them,they are two years old,they all looked good.Seems to act up after it gets warm.Sometimes it will idle great and sometimes it will die when i push in the clutch.Please help with some ideas.
Truck is running rough and jerking.It will jerk so hard it feels like you hit something.It has been doing this for 8 months now and the dealer can not find anything wrong.I have changed fuel filter,plug wires,cap and rotor,thermostat,pulled the plugs and checked them,they are two years old,they all looked good.Seems to act up after it gets warm.Sometimes it will idle great and sometimes it will die when i push in the clutch.Please help with some ideas.
Senior User
Joined: Mar 2000
Posts: 425
Likes: 0
rough running
Check and replace fluid in the clutch master cylinder and replace the plugs anyways, they are very cheap, does the idle fluctuate? If the idle goes up/down but can be kept running by goosen the gas than you probably have a vacume leak somewhere on the upper or lower intake...no check engine lights? Assuming no lights that should rule out any emission equipment...did the dealing check the EGR and the PCV systems?
1995 F-150XL SC/SB
http://members.sounddomain.com/blind
5-Star Rated F-150 (Big Stereo)
1995 F-150XL SC/SB
http://members.sounddomain.com/blind
5-Star Rated F-150 (Big Stereo)
Posting Guru
Joined: Sep 2000
Posts: 1,586
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From: Linwood, N.J. USA!
rough running
[font size="1" color="#FF0000"]LAST EDITED ON 20-Feb-01 AT 08:56 PM (EST)[/font][p]Check for vacuum leak. You could have a worn vacuum hose from chafing against the block or dry rot. Also, check EGR valve to see if it is functioning properly and that it has plenty of vacuum. Good luck.
Jakegypsum // Ford fleet, soup to nuts.
Jakegypsum // Ford fleet, soup to nuts.
