99 Sierra won't start - HELP!

blackgmc99

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I was messing around with something in the engine compartment with the engine running and accidently bumped off the pvc valve hose. The engine started to shudder then shut off. After plugging the hose back in I can't get it started. It turns over ok and I am getting fuel and spark at each plug (I connected my timing light to each plug wire and cranked the engine which
flashed). An thoughts on what it could be. My truck is a V6 with automatic transmission. Thanks for any ideas to try next.
Mike
 


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