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1998 Chevy Silverado Did a bunch of work and now truck won'

Tiny
RAHCUE
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 278,000 MILES
1998 K1500 5.7l will not start. Did a valve job, new timing chain, and upgraded to 1.6 ratio roller tip rocker arms. Truck hasn't started since reassembled. Floods out plugs. Had new Autolite platinums in, replaced with new ACDelco platinums, still floods plugs and will not start. Timing and rocker arms have been re-checked a dozen times by myself as well as 2 mechanic friends. Rockers are set to 0 lash plus 1/2 turn. I did initially have plug wires crossed and it backfired pretty seriously when I started. Also new cap/rotor/wires, used a spark plug in a wire to test and truck has great spark and, again, timing is dead on.
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Tuesday, October 13th, 2009 AT 10:36 AM

4 Replies

Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
You need to be 100% sure you have the distrubito aligned correctly. Start there. Also make sure there is no plug wires crossed. I know you said you did but double check. Sounds like an issue with the spark. Let me know what you find
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Wednesday, September 2nd, 2020 AT 5:30 PM
Tiny
RAHCUE
  • MEMBER
  • 2 POSTS
Distributor is dead on, #1 firing exactly on timing mark, both valves closed (on compression stroke), no backfiring (have plug wires routed correctly). Still flooding plugs.
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Wednesday, September 2nd, 2020 AT 5:30 PM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Did you double check to make sure you have everything plugged in, all grounds are connected. Did you also check to see if you have good compression on the cylinders
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Wednesday, September 2nd, 2020 AT 5:30 PM
Tiny
BIG_JAY
  • MECHANIC
  • 121 POSTS
Also back off your roller rockers and keep them at 0 lash. You need to crank the truck over build oil pressure and then set them to 0 lash. If the lifter werent pumped up when u set them then after they are pumped up your valves may all be staying open.
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Wednesday, September 2nd, 2020 AT 5:30 PM

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