No spark. Please help.
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Senior User
Joined: Jul 2006
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No spark. Please help.
Sorry for double posting. I have this under 80s trucks. I don't know how to move my forum.
i have an 86 f250 i just bought back with no spark. this truck is not original. used to be a diesel. has a 400 out of 81 f250. had this truck running just fine 4 years ago. sold it to a guy running and bought it back 4 yrs later not running.
checked all the connection to make sure they r clean. had the ignition modular tested and tested good. have 12+ volts from the white and red wire. have a little over 6 volts at the bat side of the coil. i have no spark from the coil. i notice every time i connect and disconnected the bat cable i will get a spark from the coil. i ran a test light from the tack test sight on the coil and tried to start and the light stayed real dim and never flickered.
if there is someone that can keep this simple and explain what i need to do to solve this problem will be very help full.
i have an 86 f250 i just bought back with no spark. this truck is not original. used to be a diesel. has a 400 out of 81 f250. had this truck running just fine 4 years ago. sold it to a guy running and bought it back 4 yrs later not running.
checked all the connection to make sure they r clean. had the ignition modular tested and tested good. have 12+ volts from the white and red wire. have a little over 6 volts at the bat side of the coil. i have no spark from the coil. i notice every time i connect and disconnected the bat cable i will get a spark from the coil. i ran a test light from the tack test sight on the coil and tried to start and the light stayed real dim and never flickered.
if there is someone that can keep this simple and explain what i need to do to solve this problem will be very help full.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Disconnect the distributor and measure the resistance between the ORANGE and PURPLE wires coming from the distributor. The resistance should be between 400 and 700 ohms. Neither wire should have continuity with the BLACK wire.
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