tat2 chris

5.3 stand alone harness . vatt delete.. crank no start .. checked cam sensor an crank sensor .. have fire no fuel to any injectors..60 psi while cranking but falls flat line when turn key off.my bud hit it with some help only to have lmao the engine back fire an blow the mass air flow apart. told him not good idea...now he knows . iv change the psi regulator on the rail also.what could be the problem.. engine is out of a 2000 Silverado an im new here also so if iv got this wrong bust my ***** ....

jborders

I have a 5.3 in my 68 c10 and had a similar problem. If it's been sitting for awhile the injectors get clogged up. Mine had one stuck open. Had to clean them real good and tap on them while it first started running also. Also check and see if they are getting power.

ls1nova71

iTrader: (4)

Sounds like stuck injectors to me, but what pump are you using? In tank or external?

tat2 chris

external... from summit aeromotive A1000 with changable micro filter.... checked fire with noid light .. alll fire like should .im thinking every injector is stuck ..

ls1nova71

iTrader: (4)

Very real possibility, I've had it happen. Try taking them out and soaking them in some Seafoam overnight. Usually does the trick.