1999 Chevy Astro Engine starting problems

Tiny
ALANJ30
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 140,000 MILES
Most of the time the engine runs good. Every now and then the security code keeps flashing and the engine will start but immediately quit. After waiting for awhile with the switch on the security light will go out and the eng will start normal. That is the first part of the problem.

Now the engine will refuse to start and the security light is not on. I was told to pound on the bottom of the fuel tank to unstick the fuel pump, which I did, and the engine started. The second time, the pounding did no good but after sitting all night the engine started normal the next day.

This is the second astro van that I had with starting problems. The first was a 1996 which had numerous problems starting. Is this an inherent problem with Astro's? What can be done to eliminate the starting problem.

Thanks, Al Banks
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Monday, September 7th, 2009 AT 2:56 PM

3 Replies

Tiny
MERLIN2021
  • EXPERT
This Tech bulliten is from Checvy to thier dealers. Probably your problem!
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 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
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Tuesday, September 8th, 2009 AT 6:39 AM
Tiny
ALANJ30
  • MEMBER
There is no resistance to the start motor at all, it spins freely. If it were a sensor, would that allow the car to start after it sits for awhile?

Also, the service engine soon light is always on. It came on about a month ago right after I had the vehicle serviced.

This problem happened before and after the service engine soon light came on.
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Tuesday, September 8th, 2009 AT 8:08 AM
Tiny
MERLIN2021
  • EXPERT
First thing to do is scan the codes, autozone does it for free, then post the codes here. Yes if the cranksensor develops a heat problem it can fail to start when hot, and start after a brief coll down period. The bulliten refer to code P0338, if that's stored in memory, definatly replace it, SCAN IT!
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Tuesday, September 8th, 2009 AT 8:47 AM

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