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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

TFI/IGNITION problem,Heeelp.

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Old Nov 10, 2008 | 07:52 PM
  #1  
393STROKER's Avatar
393STROKER
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From: houston
TFI/IGNITION problem,Heeelp.

This thing was running too good to be true. It`s got MSD stuff ,but she wont stay running for too long before it just shuts off. Any help from you true americans would be greatly appreciated.
 
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Old Nov 10, 2008 | 08:02 PM
  #2  
DJdemon6696's Avatar
DJdemon6696
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a little more info would be gr8.. wich engine wich year.. MAF, SD?, carb ?
 
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Old Nov 10, 2008 | 08:08 PM
  #3  
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88n94
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From: South Dakota
Is this the 1990 F-150 in your profile? What all on it is MSD? How long before it will restart when it shuts off? Have you checked to see if it's ignition(spark) you are losing when it shuts off?
 
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Old Nov 10, 2008 | 08:27 PM
  #4  
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ymeski56
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From: Long Beach, Calimexiforia
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do a KOEO scan & check for fuel & spark ta see whats missing.
 
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Old Nov 10, 2008 | 08:35 PM
  #5  
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From: houston
Thanx, it,s a boneyard block from a `90 F-250 w/Eagle stroker crank kit,Probe pistons,Trickflow ported heads,Edelbrock port matched EFI intake,BBK big throttle body,Mass air conversion kit,30lb inj. I`m running MSD digital 6,billet 5.8 dist. and a MSD Blaster HVC-2 coil,pullys,headers that I welded smog tubes on.Comp roller cam w/roller rockers/stud girdles etc. I changed out the steering column the other day thinking the wiring was bad because awhile back we had this same problem and we fixed it by bypassing the ignition switch with a starter button. It wil run in the driveway but once it gets on the road it might run for 15 min. befor the ignition cuts out. Some times it will start up after a few min. sometimes much longer, now , after I try some kind of a fix and take it out to test it I bring some ice to put on the TFI module.
 
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Old Nov 12, 2008 | 09:53 PM
  #6  
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deeznuts822
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From: ohio
try the coil, usually they fail when hot,usually die within the 15 min time u describe
 
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Old Nov 13, 2008 | 11:51 AM
  #7  
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yeah i would suspect the coil or tfi module first.
 
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