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k5 w/ TBI 350 blows ecm fuse on inclines

o_fatmike_o

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Jun 30, 2013
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Rock springs , WY
i have a 90 k5 blazer. anytime i try and climb a steep incline or even a steep paved road the engine kinda bogs down for a min (even with the accelerator floored) almost like its running out of gas and the ecm fuse blows ???? wtf lol. have not started tracing wires yet was just curious if anyone else has had this problem?
 
Never had the bogging down issue but did have an issue sometimes when i accelerated, slowed, turned, etc it would blow that fuse. It was a wire that ran across the top of the transmission case and every once in awhile it would shift and a tiny spot that had worn insulation would ground. Might have been the o2 sensor wire, really don't remember. It took months before I figured it out because as soon as i put the new fuse in, it was fine.
 

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