no start --injector problem

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  #1  
Old 08-21-06, 10:15 AM
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no start --injector problem

have a 99 olds sillhouette, car would not start, took to local auto repair for diagnosis, they said fuel pump, replaced that, still no start.....started checking around, looked in the underhood fuse/relay box, found the fuse marked 'inj' was blown..ANY suggestions what could cause this, where to start looking?
the car was not starting up with out cranking more than it should, didnt matter if cold or hot.....
 
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Old 08-21-06, 03:12 PM
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Did replacing the fuze fix the no-start and/or did it blow the replacement fuze?
 
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Old 08-22-06, 02:38 AM
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Well fuses do blow sometimes that why they are there. if replacement of the fuse fixes it and does not happen again you fixed it. if it doe it again then there must be an additional path like a short to that circuit must find it otherwise your car will blow fuses forever. look for shorts freyed wire and use a wood stick and probe to find the bad wires.
 
  #4  
Old 08-23-06, 08:42 AM
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I replaced the fuse, and it blew the instant I turned the key on. Even replaced the relay, with ANOTHER new fuse, blew it(fuse) too.
 
  #5  
Old 08-23-06, 05:24 PM
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Post injector

gramps the problem is that you have a short to ground on the 12v side of the injectors , with the key on , you should always have 12v on the posative side of the inj, the ecm then pulses the ground side to regulate fuel volume , what you need to do is check the wire harness for a short to ground on the posative side , if you look at all 6 inj , they should all share 1 wire that is the same color on all six , this wire that is the same on all six , thats the 12v side thats were your problem is at ,and all six will have a different wire color for the ground side , now remember the ground side comes from the ecm so dont mess with it , your problem is on the 12v side which comes from the fuse , hth
 
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Old 08-24-06, 07:03 PM
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Thx, smogman, Ill check it out in the morning, in some decent light
 
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