Crank fuse continually blowing, need help
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Junior Member

Joined: Jun 2013
Posts: 20
Likes: 0
From: Virginia
Car: 1986 Iroc
Engine: LB9
Crank fuse continually blowing, need help
Hello all. So my 86 IROC just suddenly started cranking and not starting. I checked to see if I was getting fuel and it is, I checked for spark and its got spark. So I decided to check my fuses for the hell of it and found my crank fuse blown. I replaced it and tried starting it again and she just kept cranking. I rechecked the crank fuse and sure enough it was blown. I checked all the wiring to the solenoid and it all looks fine, (as suggested by youtube.) I'm looking for any help for places to look to find the problem. Any help at all would be grately appreciated!!
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Joined: Jul 2006
Posts: 2,873
Likes: 790
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Crank fuse continually blowing, need help
Hello all. So my 86 IROC just suddenly started cranking and not starting. I checked to see if I was getting fuel and it is, I checked for spark and its got spark. So I decided to check my fuses for the hell of it and found my crank fuse blown. I replaced it and tried starting it again and she just kept cranking. I rechecked the crank fuse and sure enough it was blown. I checked all the wiring to the solenoid and it all looks fine, (as suggested by youtube.) I'm looking for any help for places to look to find the problem. Any help at all would be grately appreciated!!
Then the Crank circuit is only used for the Cold Start Fuel Injector circuit (often referred to as the 9TH Fuel Injector).
There is an issue in that circuit; high resistance of the Cold Start Injector will definitely draw more current than that minuscule Fuse can handle.
Thread Starter
Junior Member

Joined: Jun 2013
Posts: 20
Likes: 0
From: Virginia
Car: 1986 Iroc
Engine: LB9
Re: Crank fuse continually blowing, need help
Ty for the quick reply! Its still TPI but I put a 350 in it after the 2nd 305 blew up in it. Shouldn't make a difference right?
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