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No spark no fuel

Tiny
JOSEPH ARREDONDO
  • MEMBER
  • 2003 CHEVROLET TRAILBLAZER
  • 4.2L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 237,678 MILES
I just put a new timing chain in my vehicle. Before I did so, it ran. Just with bad timing. I have the engine put back together with new oil in it. Have not put the serpentine belt back on or the radiator as I feel this is not my problem. Since I have the engine put back together, before I went any further I wanted to see if it would run for a few seconds. But I am getting no power to the coils and no fuel. I scanned the computer and it gave me a p168 code. Ignition one switch circuit two. I checked voltage at ignition and it is all good. I checked fuses and relays. They are all good. I made sure all sensors and computers are hooked back up properly. But still no luck getting spark or fuel. And my security light does not flash, so I do not believe the pass lock has been activated. Serious help needed.
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Wednesday, May 24th, 2017 AT 10:43 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try a security reset anyhow sometimes if battery was disconnected it does not light but sets anyhow. See picture.
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Wednesday, May 24th, 2017 AT 12:30 PM

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