97 GMC Yukon Won't Start 5.7L V8

[OR VietVet]

Did he swap wires yet or change the cap? He said on Monday he would look tomorrow, Tuesday, and let us know.

 

[nate70500]

I swapped the wires and still is a problem with plug 3. I don't see any areas that look burned through on the cap but I ordered a new one and it should be here next Tuesday

 

[1BADI5]

If your truck has the L31 engine...............I know what it is, happened to me in my 99 Yukon.

There is a crank sensor under the bottom of the motor to the front of the oil pan. My died in the middle of an intersection, it was like $15 for the part and took like 5 minutes to install.

 

[OR VietVet]

If your truck has the L31 engine...............I know what it is, happened to me in my 99 Yukon.

There is a crank sensor under the bottom of the motor to the front of the oil pan. My died in the middle of an intersection, it was like $15 for the part and took like 5 minutes to install.

That effects cylinder #3? What am I missing?