1995 Pontiac Bonneville no start situation

Tiny
DUNNSAUTOREPAIR
  • MEMBER
  • 1995 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
Has codes p0341, p0342, p0705. Engine rotates will not start. Replaced cam sensor. Has 40 psi on fuel rail, has spark on all coils, niod light shows injectors are
plusing. Took exhaust pipe lose, after turning over cqn smell gas at exhaust. When turning over it will pop
back through exahust and sometimes thruoght the
throttle body. Acts like the engine is out of time. It had new spark plugs installed a week ago, when the plenum was repalced. It had filled up with coolant
and was locked down. Timing chain? I don't know what to check next any ideas.
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Sunday, March 1st, 2009 AT 9:56 AM

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Tiny
MERLIN2021
  • EXPERT
Diagnostic Procedures 1. Perform On-Board Diagnostic (OBD) System Check. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step. 2. Using scan tool, read and record FAIL RECORDS data for DTC P0341. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool displays DTC P0341 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0341 FAILED THIS IGN, see DIAGNOSTIC AIDS. 3. Turn ignition off. Disconnect PCM connectors. Using DVOM, check voltage on CMP sensor signal circuit at PCM harness connector. Turn ignition on. If voltage is about 5 volts, go to next step. If voltage is not as specified, go to step 5). 4. Remove CMP sensor, but leave harness connector connected. Place a magnet on CMP sensor. If voltage is now about zero volts, go to step 16). If voltage is not as specified, go to step 8). 5. If voltage is greater than 5 volts, go to step 7). If voltage is 5 volts or less, go to next step. 6. Turn ignition off. Disconnect Ignition Control Module (ICM) connector. Leave PCM connector disconnected. Turn ignition on. Connect a test light between battery voltage and ICM harness connector CMP sensor signal and CMP sensor input circuits. If test light illuminates, locate and repair short to ground in CMP sensor signal or input circuit and go to step 24). If test light does not illuminate, go to step 13). 7. Turn ignition off. Disconnect Ignition Control Module (ICM) connector. Leave PCM connector disconnected. Turn ignition on. Connect a test light between engine ground and ICM harness connector CMP sensor input circuit. If test light illuminates, locate and repair short to voltage in CMP sensor input circuit and go to step 24). If test light does not illuminate, go to step 18). 8. Disconnect CMP sensor. Check voltage between CMP sensor harness connector sensor feed and sensor ground circuit. If voltage is about battery voltage, go to next step. If voltage is not as specified, go to step 12). 9. Check voltage CMP sensor harness connector sensor signal and sensor ground circuits. If voltage is 5-7 volts, go to next step. If voltage is not as specified, go to step 11). 10. Check voltage on PCM harness connector CMP sensor input signal circuit. Connect a test light to CMP sensor harness connector sensor signal circuit. Repeatedly touch other end of test light to engine ground. If voltage switches from zero to 5 volts, go to step 15). If voltage does not switch, go to step 14). 11. Turn ignition off. Disconnect Ignition Control Module (ICM) connector. Leave CMP sensor connector disconnected. Turn ignition on. Check CMP sensor signal circuit for open or short to voltage. Check CMP sensor input signal circuit for short to voltage. If a problem is found, repair as necessary and go to step 24). If no problem is found, go to step 14). 12. Turn ignition off. Disconnect ICM and CMP sensor connectors. Check sensor feed and sensor ground circuits for open between ICM and CMP sensor. If a problem is found, repair as necessary and go to step 24). If no problem is found, go to step 14). 13. Check for open in CMP sensor input signal circuit between ICM and PCM. If open is found, repair as necessary and go to step 24). If open is not found, go to next step. 14. Check for faulty connection at ICM. If faulty connection is found, repair as necessary and go to step 24). If ICM connection is okay, go to step 17). 15. Check for faulty connection at CMP sensor. If faulty connection is found, repair as necessary and go to step 24). If connection is okay, go to step 19). 16. Check for faulty connection at PCM. If faulty connection is found, repair as necessary and go tostep 24). If PCM connection is okay, go to step 20). 17. Check for incorrect harness routing near secondary ignition components, ignition coil arcing to wiring harness or ICM. Check ignition coils for cracks, carbon tracking or other signs of damage. Check for secondary ignition wire(s) arcing to wiring harness. If a problem is found, repair as necessary and go to step 24). If no problem is found, go to next step. 18. Replace ICM and go to step 24). 19. Replace CMP sensor and go to step 24). 20. Check for incorrect harness routing near secondary ignition components, ignition coil arcing to wiring harness or ICM. Check ignition coils for cracks, carbon tracking or other signs of damage. Check for secondary ignition wire(s) arcing to wiring harness. If a problem is found, repair as necessary and go to step 24). If no problem is found, go to next step. 21. Reinstall CMP sensor. Using DVOM, check voltage on CMP sensor input signal circuit while cranking engine. If voltage switches from zero to 4 volts, go to next step. If voltage does not switch, go to step 23). 22. Replace PCM. Program replacement PCM using required equipment. After repairs are completed, go to step 24). 23. Replace faulty or missing CMP sensor and go to next step. 24. Read and record FAIL RECORDS data for DTC P0341. Clear DTCs. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool displays DTC P0341 FAILED THIS IGN, return to step 2). If scan tool does not display DTC P0341 FAILED THIS IGN, repair is complete.
Can be caused by a bad ICM
P0705= Transmission range sensor, and can also cause timing problems, test/replace it and see if it starts, If you have been cranking this engine, change the oil and filter before starting it, cranking has loaded the engine with gas. Plugs may need replacing if soaked.
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Sunday, March 1st, 2009 AT 10:13 AM

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