alright that noise i believe is the fuel running thru its manifold and regulator. have you tested for spark when it won't go. you can have no spark from ignition system or fuel injector connections that are poor somewhere or the pcm won't send the reference for spark and fuel because it is not seeing activity from the crank sensor. you can lose the cam sensor and have a long rough start but it should run regardless. try spark testing at least two front cylinders on each side and look for oddities in there pattern.
---------- Post added at 05:31 PM ---------- Previous post was at 05:26 PM ----------
even you previous video has me thinking you are have a crank sensor issue. do you have any crack on the block mounting bosses where the starter go?
i posted this in 2011. kinda fits your problem i think.
SunlitComet
02-19-2011, 12:03 AM
It sound like you are suffering from the tsb below. You said you replaced the crank sensor perhaps you got another bad sensor or something in the wiring is goofed. You can also have a left over symptom listed below that was over looked. One other thing did you perform the crank relearn procedure when you replaced it last? Here is the TSB details:
Engine - No/Hard/Slow Start/Backfire/Kickback
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 00-06-04-014
Date: April, 2000
TECHNICAL
Subject:
No, Hard, or Slow Start, Backfire or "Kickback" During
Crank/Start, "Grinding" or Unusual Noises During Crank, DTC P0338
(Replace Crankshaft Position Sensor)
Models:
1999-2000 Cadillac Escalade
1995-2000 Chevrolet and GMC SIT Models
1996-2000 Chevrolet and GMC C/K, M/L, G, P Models
1996-2000 Oldsmobile Bravada
with 4.3 L, 5.0 L, 5.7 L or 7.4 L Engine
(VINs W, X, M, R, J RPOs L35, LF6, L30, L31, L29)
Condition:
Some customers may comment on one or more of the following conditions:
^ Backfire during crank/start
^ "Kickback" during crank/start
^ "No" start
^ "Slow" or "hard" start/crank
^ "Grinding" or unusual noises during crank/start
^ Cracked or broken engine block at the starter boss
^ Broken starter drive housing
^ Broken starter ring gear on flywheel
^ Any combination of the above
Cause:
A condition may exist that allows the crankshaft position sensor to command up to 50 extra degrees of spark advance during engine cranking only. This in turn exposes the engine to higher than normal cylinder pressures which may result in an inoperative condition to the starter drive housing, the engine flywheel starter ring gear, or the engine block at the outside edge of the starter boss.
Correction:
Inspect for a stored powertrain DTC code P0338. This DTC will NOT illuminate the "Service Engine Soon" light. If this code is stored, the Crankshaft Position Sensor, P/N 10456607, MUST be replaced and the remaining components inspected for damage (engine block at the starter boss, the starter drive housing, and the engine flywheel starter ring gear).
Notice : When DTC code P0338 is set, failure to replace the Crankshaft Position Sensor could result in repeated inoperative conditions of the starter or flywheel.
Important : Some flywheel wear is normal; broken or missing teeth and/or cracks, are not normal.
