Mechanics

CHEVY CUTTING OUT AT LOW RPMS

2000 Chevrolet Blazer

Engine Performance problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 10000 miles

I have a 2000 Blazer that runs great when there is no mositure in the air or if it is not raining. But when its raining it wants to heistate, but once it gets warmed up good or sits in the sun for awhile it will run fine. We have spent a ton of money and are tapped out trying to find the problem. Could this be something electical. Have replaced plug wires, plugs, fuel pump, pvc valve, rotor cap, and several other things. Please help I need my truck.
Avatar
Lprez
September 26, 2008.



Check this TSB may have something to do with it.
Page 1 of 2 NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338 -2000 Chevrolet.
NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338
TECHNICAL SERVICE BULLETIN
Reference Number(s): 00-06-04-014,  Date of Issue:   April, 2000 Related Ref Number(s): 00-06-04-014
ARTICLE BEGINNING
NO, HARD, OR SLOW START, BACKFIRE OR " KICKBACK" DURING CRANK/START, " GRINDING" OR UNUSUAL NOISES DURING CRANK, DTC P0338 (REPLACE CRANKSHAFT POSITION SENSOR)
Model(s): 1999-2000 Cadillac Escalade; 1995-2000 Chevrolet and GMC S/T 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)
Section: 06 - Engine/Propulsion System
Bulletin No: 00-06-04-014
Date: April, 2000
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

9/26/2008
Page 2 of 2 NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338 -2000 Chevrolet.
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).
NOTE: When DTC code P0338 is set, failure to replace the Crankshaft Position Sensor could result in repeated inoperative conditions of the starter or flywheel.
NOTE: 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: WARRANTY INFORMATION
Labor Code Description Labor Time J4355 Sensor, Crankshaft Position - Replace Use published labor operation time

9/26/2008

Merlin2021
Sep 26, 2008.
The car does not make any of these noise when it cranks it runs fine, it only hesitates when has been raining or alot of mositure in the air. What you are telling me, does not sound like anything that is going on. Please help

uote=" merlin2021" ]Check this TSB may have something to do with it.
Page 1 of 2 NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338 -2000 Chevrolet.
NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338
TECHNICAL SERVICE BULLETIN
Reference Number(s): 00-06-04-014,  Date of Issue:   April, 2000 Related Ref Number(s): 00-06-04-014
ARTICLE BEGINNING
NO, HARD, OR SLOW START, BACKFIRE OR " KICKBACK" DURING CRANK/START, " GRINDING" OR UNUSUAL NOISES DURING CRANK, DTC P0338 (REPLACE CRANKSHAFT POSITION SENSOR)
Model(s): 1999-2000 Cadillac Escalade; 1995-2000 Chevrolet and GMC S/T 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)
Section: 06 - Engine/Propulsion System
Bulletin No: 00-06-04-014
Date: April, 2000
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

9/26/2008
Page 2 of 2 NO/HARD/SLOW START NOISE DURING CRANKING DTC P0338 -2000 Chevrolet.
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).
NOTE: When DTC code P0338 is set, failure to replace the Crankshaft Position Sensor could result in repeated inoperative conditions of the starter or flywheel.
NOTE: 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: WARRANTY INFORMATION
Labor Code Description Labor Time J4355 Sensor, Crankshaft Position - Replace Use published labor operation time

9/26/2008[/quote]

Tiny
Lprez
Sep 30, 2008.
When its wet, or wont start, test the crank sensor, get a spray bottle with waterr, spray the sensor, see if it prevent it from starting, if yes, replace it, they DO NOT need to make noise!

Merlin2021
Oct 2, 2008.
Were do I find the crank sensor. Were is located and what does it look like. Also thank you I have never heard of a crank sensor.

Tiny
Lprez
Oct 3, 2008.
Under the ckank, held on by one screw.


http://www.2carpros.com/forum/automotive_pictures/62217_ckp_1.jpg


Merlin2021
Oct 3, 2008.