SunlitComet
OBS Jedi-Do Good
power supply to starter. from battery under load.
Noisy IAC, No start; fuel, IAC, or?
- Thread starter nimrod.sixty9
- Start date
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OP
OP
nimrod.sixty9
Hold on, I got this.
Look at this TSB. This really makes me think this is it.
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.
Parts Information
Parts are currently available from GMSPO. Warranty Information:
For vehicles repaired under warranty, use the table.
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.
Parts Information
Parts are currently available from GMSPO. Warranty Information:
For vehicles repaired under warranty, use the table.
SunlitComet
OBS Jedi-Do Good
monitor your rpm thru a scanner and compare it to the tachometer. do they match or does the pcm rpm seem really erratic?
OP
OP
nimrod.sixty9
Hold on, I got this.
Unfortunately I cant even get it to run now.
OP
OP
nimrod.sixty9
Hold on, I got this.
Well went to inspect the CPS and instead of coming out, the half in the motor stayed. Now how in the hell do I get the rest out?!
SunlitComet
OBS Jedi-Do Good
use the force luke.
OP
OP
nimrod.sixty9
Hold on, I got this.
use the force luke.
Not really sure what to do atm. Thinking maybe taking a sized bit and weakening the plastic. Maybe pick at it with needle nose pliers. Damnit, wish someone would have mentioned this thing could break in half, I was just going to inspect it and now stuck. FML
SunlitComet
OBS Jedi-Do Good
actually you are the first time i have seen that happen as it did.
OP
OP
nimrod.sixty9
Hold on, I got this.
That explains it.
Well, I was able to get out the remaining part of the CPS and installed the new one... Same result. It would turn and turn and no fire, just a blump here and there with the occasional kickback. It would at least start once and awhile but it got worse and worse up until it stopped running (just before I broke the CPS).
For ***** and giggles I changed the coil between this and my Tahoe... Same result, except, if I ever find the ******* who designed this crap, I will beat him till he is ******** himself.
So what now?
Well, I was able to get out the remaining part of the CPS and installed the new one... Same result. It would turn and turn and no fire, just a blump here and there with the occasional kickback. It would at least start once and awhile but it got worse and worse up until it stopped running (just before I broke the CPS).
For ***** and giggles I changed the coil between this and my Tahoe... Same result, except, if I ever find the ******* who designed this crap, I will beat him till he is ******** himself.
So what now?
I had a weird no-start issue once and this tutorial helped me to find a coil wire that was grounding out on a bracket.
http://easyautodiagnostics.com/gm_misfire_diagnostic/ignition_misfire_tests_1.php
Noisy IAC is strange though.
Before starting ignition testing, I like to verify that fuel pressure is within range. (Either through the Schrader valve pressure test, or by using some starting fluid directly into the throttle body to see if things change.)
Good Luck though ******.sixty9
http://easyautodiagnostics.com/gm_misfire_diagnostic/ignition_misfire_tests_1.php
Noisy IAC is strange though.
Before starting ignition testing, I like to verify that fuel pressure is within range. (Either through the Schrader valve pressure test, or by using some starting fluid directly into the throttle body to see if things change.)
Good Luck though ******.sixty9
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