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Tuesday, September 28th, 2010 AT 1:44 PM
WRENCHTECH
- MECHANIC
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Take a week if you want. I'll be available.
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I haven't been able to get it to start?
ANTHONY BOWLING
- MEMBER
- 28 POSTS
I was able to get a test light and one of the guys at Auto zone told me to take one of the coil packs off and ground the clip end and then turn the key on and see if it lit up. I did this and the test light did light up on one side. So I assume that it is getting power through it. Should I do this for each pack or is the one enough to tell you what you need to know. Also do I need to do a compression test on each cylinder again? I have done it once and each one held a steady reading of 180-190 after cranking the engine four rotations each.
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Tuesday, September 28th, 2010 AT 3:45 PM
WRENCHTECH
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No, you have already satisfied compression, fuel pressure and power to the coil. Now do the rest of it.
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Tuesday, September 28th, 2010 AT 4:21 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
Hello, I just got a chance to get back with you. In the morning I will test the injectors and let you know whats happening at that point. We are still getting a lot of rain so I have been trying to do things in between showers. I am however going out right now and check for spark again, it may be easier to see with it being dark. This really does mean a lot to me and if I can pay you something I will do what I can. I think it's only fair to let you know that I live off of disability but I would pay you something for your help. Just let me know so I can see if I'll be able to give you something. Again Thank you for your time and your help. OK I just went outside and crank over the engine I had an old plug in one of the plugwire boot : I have no spark at all.
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Tuesday, September 28th, 2010 AT 6:17 PM
WRENCHTECH
- MECHANIC
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I'm not interested in your money. We are on the third page of this question and have not accomplished anything yet. Post back when you have all the results.
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Tuesday, September 28th, 2010 AT 6:31 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
OK I rented the noid light today, when engine cranked over it did nothing. I also took a couple of plug wires off at the coil and cranked engine wile holding test light to one side and grounding the other end, still got nothing. So I took one coil pack off of the ignition module and put test light to it and it lights up on one side. I didn't check all three but I will if I need to. I hope this information helps in the diagnosis. Thank you Sir.
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Wednesday, September 29th, 2010 AT 3:22 PM
WRENCHTECH
- MECHANIC
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I don't know if you did so or not but you need to test for spark at the end of the plug wire to determine if any spark is there. You can't use a test light for that because it's 30,000 volts. The spark tester lets the spark jump without having to hold the wire. You also need to test for power with a test light at one side of the injector with the key on.
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Wednesday, September 29th, 2010 AT 3:27 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
I tested for spark late yesterday evening, just before dark so it would be easier to see. I had no spark what so ever. I just tested the injector and one side does light up. OK I'm not sure if I hit the send button or not, so I'll try again. I don't have a spark tester but I can use an old plug that I took out of it; will this be sufficient? If not I can pick up the tester tomorrow. If there is anything else I need to get just let me know.
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Wednesday, September 29th, 2010 AT 3:40 PM
WRENCHTECH
- MECHANIC
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OK, now what all these tests have told me is that you have power supply to these components but no reference signal from the PCM. The signal is supplied by the Crankshaft Position sensor. There is a good chance that the sensor itself is bad but there are also possibilities that it could be any of the related wiring or the PCM itself. I would visually look over the wiring to the Crank sensor for any damage. If none is found, it would be a reasonable risk to try a new Crank sensor. You would need a portable lab scope to be able to test it.
After replacing the sensor, you are supposed to perform a Crankshaft Learn procedure with a scan tool. You may not have to but if it runs but sets a code, you have to get it done.
The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation does not match the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set (refer to Diagnostic Aids for DTC P0300).
The Crankshaft Position System Variation Learn Procedure should be performed it any of the following conditions are true:
* DTC P1336 is set.
* The PCM has been replaced.
* The PCM has been reprogrammed.
* The engine has been replaced.
* The crankshaft has been replaced.
* The crankshaft harmonic balancer has been replaced.
* The crankshaft position sensor has been replaced.
WARNING: Set the vehicle parking brake and block the drive wheels when preforming the Crankshaft Position System Variation Learning Procedure In order to prevent personal injury. Release the throttle immediately when the engine starts to decelerate. Once the learn procedure Is completed, the PCM will return the engine control to the operator and the engine will respond to the throttle position.
Important: Begin the crankshaft position system variation learn procedure with the ignition switch OFF. Do not turn ON the ignition switch or start the vehicle unless instructed to do so by the scan tool.
The scan tool crankshaft position system variation learn function will be inhibited if any powertrain DTCs other than DTC P1336 are set before or during the crankshaft position system variation learn procedure. Clear DTCs before attempting to perform the crankshaft position system variation learn procedure. If any DTCs reset, the DTCs must be diagnosed and repaired before the crankshaft position system variation learn procedure can be sucessfully completed.
The crankshaft position system variation learn function will be inhibited if the PCM detects a malfunction involving the camshaft position signal circuit, the 3X reference circuit, or the 18X reference circuit.
* If the scan tool indicates that a problem with the camshaft position signal exists, refer to DTC P0341 CMP Sensor Circuit Performance.
* If the scan tool indicates that a problem with the 3X crank signal exists, refer to DTC P1374 3X Reference Circuit.
* If the scan tool indicates that a problem with the 18X crank signal exists, refer to DTC P0836 18X Reference Signal Circuit.
The scan tool crankshaft position system variation learn function will not be enabled until engine coolant temperature is greater than 70 °C (158 °F). Selecting the crankshaft position system variation learn procedure on the scan tool will command the PCM to enable CKP system variation learn fuel cutoff and allow the crankshaft position system compensating values to be stored in the PCM. The PCM must detect an engine speed of 5150 RPM (CKP system variation learn fuel cutoff) during the crankshaft position system variation learn procedure to store the crankshaft position system compensating values and complete the procedure.
1. Set the parking brake.
2. Block the drive wheels.
3. Close the hood.
4. Start the engine and allow engine coolant temperature to reach at least 70 °C (158 °F).
5. Turn OFF the ignition switch.
6. Select and enable the crankshaft position variation learn procedure with the scan tool.
7. Start the vehicle
8. Ensure that the transaxle is in Park.
9. Apply the brake pedal firmly.
10. Increase accelerator pedal position until CKP system variation learn fuel cutoff is reached. CKP system variation learn fuel cutoff is reached at 5150 RPM. Immediately release the accelerator pedal when fuel cutoff is reached.
11. The crankshaft position system variation compensating values are learned when RPM decreases back to idle. If the procedure terminates, refer to Important above for instructions.
12. Observe DTC status for DTC P1336.
13. If the scan tool indicates that DTC P1336 ran and passed, the crankshaft position system variation learn procedure is complete. If the scan tool indicates DTC P1336 failed or not run, check for other DTCs. If no DTCs other than P1336 are set, repeat the crankshaft position system variation learn procedure as necessary.
After replacing the sensor, you are supposed to perform a Crankshaft Learn procedure with a scan tool. You may not have to but if it runs but sets a code, you have to get it done.
The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation does not match the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set (refer to Diagnostic Aids for DTC P0300).
The Crankshaft Position System Variation Learn Procedure should be performed it any of the following conditions are true:
* DTC P1336 is set.
* The PCM has been replaced.
* The PCM has been reprogrammed.
* The engine has been replaced.
* The crankshaft has been replaced.
* The crankshaft harmonic balancer has been replaced.
* The crankshaft position sensor has been replaced.
WARNING: Set the vehicle parking brake and block the drive wheels when preforming the Crankshaft Position System Variation Learning Procedure In order to prevent personal injury. Release the throttle immediately when the engine starts to decelerate. Once the learn procedure Is completed, the PCM will return the engine control to the operator and the engine will respond to the throttle position.
Important: Begin the crankshaft position system variation learn procedure with the ignition switch OFF. Do not turn ON the ignition switch or start the vehicle unless instructed to do so by the scan tool.
The scan tool crankshaft position system variation learn function will be inhibited if any powertrain DTCs other than DTC P1336 are set before or during the crankshaft position system variation learn procedure. Clear DTCs before attempting to perform the crankshaft position system variation learn procedure. If any DTCs reset, the DTCs must be diagnosed and repaired before the crankshaft position system variation learn procedure can be sucessfully completed.
The crankshaft position system variation learn function will be inhibited if the PCM detects a malfunction involving the camshaft position signal circuit, the 3X reference circuit, or the 18X reference circuit.
* If the scan tool indicates that a problem with the camshaft position signal exists, refer to DTC P0341 CMP Sensor Circuit Performance.
* If the scan tool indicates that a problem with the 3X crank signal exists, refer to DTC P1374 3X Reference Circuit.
* If the scan tool indicates that a problem with the 18X crank signal exists, refer to DTC P0836 18X Reference Signal Circuit.
The scan tool crankshaft position system variation learn function will not be enabled until engine coolant temperature is greater than 70 °C (158 °F). Selecting the crankshaft position system variation learn procedure on the scan tool will command the PCM to enable CKP system variation learn fuel cutoff and allow the crankshaft position system compensating values to be stored in the PCM. The PCM must detect an engine speed of 5150 RPM (CKP system variation learn fuel cutoff) during the crankshaft position system variation learn procedure to store the crankshaft position system compensating values and complete the procedure.
1. Set the parking brake.
2. Block the drive wheels.
3. Close the hood.
4. Start the engine and allow engine coolant temperature to reach at least 70 °C (158 °F).
5. Turn OFF the ignition switch.
6. Select and enable the crankshaft position variation learn procedure with the scan tool.
7. Start the vehicle
8. Ensure that the transaxle is in Park.
9. Apply the brake pedal firmly.
10. Increase accelerator pedal position until CKP system variation learn fuel cutoff is reached. CKP system variation learn fuel cutoff is reached at 5150 RPM. Immediately release the accelerator pedal when fuel cutoff is reached.
11. The crankshaft position system variation compensating values are learned when RPM decreases back to idle. If the procedure terminates, refer to Important above for instructions.
12. Observe DTC status for DTC P1336.
13. If the scan tool indicates that DTC P1336 ran and passed, the crankshaft position system variation learn procedure is complete. If the scan tool indicates DTC P1336 failed or not run, check for other DTCs. If no DTCs other than P1336 are set, repeat the crankshaft position system variation learn procedure as necessary.
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Wednesday, September 29th, 2010 AT 4:41 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
Here's what I know the guy replaced the crank sensor, so just one question since I can't get it to start in order for it to learn should I have it put in a shop and fixed? If so could you advise me with a round about estimate.
So I am not overcharged.
So I am not overcharged.
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Wednesday, September 29th, 2010 AT 4:57 PM
WRENCHTECH
- MECHANIC
- 20,761 POSTS
It should run without the learn procedure. There has to be a problem elsewhere in the circuit but it is pretty much confirmed that there is problem in the Crank sensor circuit somewhere. He may have even installed it wrong or something.
Your getting over your head here now. Most places will charge you about $100 for diagnostic but don't just look for the cheapest price because they likely don't know what they are doing.
Your getting over your head here now. Most places will charge you about $100 for diagnostic but don't just look for the cheapest price because they likely don't know what they are doing.
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Wednesday, September 29th, 2010 AT 5:02 PM
WRENCHTECH
- MECHANIC
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You could try looking side the Crank Sensor plug and make sure he didn't bend the pins over.
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Wednesday, September 29th, 2010 AT 5:06 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
Thank you for all your help, and advice. I kind of thought the same about shops. That's why I asked you.
Is it possible for it to not start because of the alternator, it was changed from a one wire to a two wire. I hope that I haven't been to much of a problem ;
if I was I apologize. But I do appreciate your help.
Is it possible for it to not start because of the alternator, it was changed from a one wire to a two wire. I hope that I haven't been to much of a problem ;
if I was I apologize. But I do appreciate your help.
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Wednesday, September 29th, 2010 AT 6:05 PM
WRENCHTECH
- MECHANIC
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I would say no, the alternator couldn't do that but I have to say when someone starts modifying any wiring, you never know what else they disturbed in the process.
I don't mind helping. We could have gotten to this point a lot quicker but we got here anyway. Good luck.
I don't mind helping. We could have gotten to this point a lot quicker but we got here anyway. Good luck.
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Wednesday, September 29th, 2010 AT 6:13 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
Hello, I wanted to let you know I took the harmonic wheel balancer off unplugged the crank sensor and sure enough there was one pin inside that was bent over. I straightened out and put it all back together. It cranked over probably three turns and fired right up. I owe a lot of gratitude and appreciation to you for all your help. I don't think I ever got your name, but Thanks for helping me.
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Thursday, September 30th, 2010 AT 12:24 PM
WRENCHTECH
- MECHANIC
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Really glad to hear you found the problem. Those pins bend very easily
You see now where I was going with all my testing
My name is Desi
Leaving positive feedback is appreciated
You see now where I was going with all my testing
My name is Desi
Leaving positive feedback is appreciated
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+1
Thursday, September 30th, 2010 AT 12:27 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
I don't really know about the point system, but the positive feedback was no problem. Thanks
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Thursday, September 30th, 2010 AT 12:52 PM
WRENCHTECH
- MECHANIC
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Thank you. Good luck with your car.
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Thursday, September 30th, 2010 AT 12:55 PM
ANTHONY BOWLING
- MEMBER
- 28 POSTS
I have been struggling with a 1994 GMC jimmy. The only thing wrong is the Idle it's as though it never warms up. My question is whether or not the idling can be adjusted. It runs good no signs of timing being out of adjustment it just idles high. It's not my vehicle it is a lady friend of mine. I told her that without your help my car would probably still be setting. You helped me on my 1998 Camaro, which by the way is running great. Thanks again for your help on that. Anyway if your not to busy and have any suggestions I would appreciate any help at all. It's a 4.3 vortec, I was thinking that it may be the throttle position sensor out of adjustment. But I wanted your professional advice before I tried anything. Thanks Desi
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Friday, October 8th, 2010 AT 2:08 PM
WRENCHTECH
- MECHANIC
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You really need to start a fresh question for that.
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Friday, October 8th, 2010 AT 2:10 PM
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How to fix an engine that wont start
