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Ashley P

LS no start solution

2 posts in this topic

2007 LS in a Denali, it ran on 4 cylinders.  The RH bank was running, LH dead.  Only a code for #3 misfire.  Had injector pulse on all cylinders.  The truck was rusty/corroded heavily, so I loosened and tightened the grounds at the stud below and behind the PS pump.  At that point the RH bank lost spark too.  I clipped a jumper on the ground wire eyelet and grounded it elsewhere...still nothing.

Each bank has it's own ground wire.  They are both crimped into the same eyelet.  Both wires were broken internally at the crimp.  Just by chance, by slightly wiggling it, I'd broken the last stands of the last working ground.  But it touched just enough to light my incandescent test light, so it fooled me for a while.

If you have injector pulse but no spark anywhere, go there.

66sprint6, Tino, JohnC and 1 other like this

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