Engine/Transmission (1994 - 1998) blowing ECM fuse

[KHelfrich]

after my truck runs for about 10 the ecm fuse blows and the truck shuts off going down the road, then i end up just zip tying my fuel solenoid and driving home. what could be causing my ecm fuse to blow, any help would be appreciated



thanks

Ken

 

[Missouri Mule]

No ECM in 12 valve trucks are you blowing a fuse to the PCM?



If it is the PCM it has nothing to do with running the engine ( your engine will run if PCM is working or not).



Any thing else happening before engine shuts down?

 

[KHelfrich]

it is the pcm and when the fuse blows the fuel solenoid looses power

thanks
Ken

 

[hsmith]

Hmmm, did not know that.

 

[tp0d]

First thing to check would be any and all wires coming from/to the PCM. Very possible you have a wire that has rubbed thru the insulation. hopefully its a 12v supply wire to the PCM instead of a sensor or output from the PCM. A bad ground shouldnt blow fuses, but who knows. .

good luck

-j

 

[Missouri Mule]

Is it a fuse in the PDC (power distribution center= in egine compartment) or the fuse box inside the truck?



Because the PCM has nothing to do with the Fuel shut off solenoid (At least what I have read in the 96 factory sevice manual). The hold up coil is powered by the igniton switch.



I doubt that they would put the PCM and the ignition switch on the same fuse. (I will try to check out what fuses run what. )

 

[KHelfrich]

it is the fuse in the dash called engine which i assume is pcm cause i lose tach and alternator when it blows which are both controlled by the pcm

 

[KHelfrich]

well i replaced the fuel solenoid and relay and it seems to have fixed it