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Technical Discussion Forum For the discussion of technical questions about Professional Cars and their repair and maintenance. Posting in this forum is limited to PCS Members and / or Site Supporters. We encourage all website users to become members of the Professional Car Society and / or become Site Supporter.

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  #11  
Old 05-30-2017, 03:35 PM
Wayne Krakowski Wayne Krakowski is offline
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Russ Dalziel and his 71 M-M had the same problem, wonder if he ever sorted it out rode to Milwaukee with him and often wondered if it would ever start but it always did. slowly but surely.
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  #12  
Old 05-31-2017, 08:49 AM
Richard Vyse Richard Vyse is offline
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I had a guy tell me to disconnect the coil and try to crank it. If it cranked strong it certainly could be the timing. He also said if that is the case I could hook up a on/off switch so when cranking the car turn the coil off then once cranking flip the switch to start her. Seems like a lot to go through.
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Old 05-31-2017, 10:04 AM
Paul Steinberg Paul Steinberg is offline
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A tune up is a lot easier, and will improve your mileage.
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Old 05-31-2017, 11:03 AM
Richard Vyse Richard Vyse is offline
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Quote:
Originally Posted by Paul Steinberg View Post
A tune up is a lot easier, and will improve your mileage.
Thanks Paul, tune-up just done 3 weeks ago with a carb rebuild. It did it before the tune-up and has done this pretty much since I've owned her.
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Old 05-31-2017, 12:40 PM
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John ED Renstrom John ED Renstrom is offline
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If it has done it all along​, try the jumper cable trick. Put one end of the cables to the negitive post on both batteries and clamp the other ends onto the engine. If it cranks good put a ground strap on the engine to the frame. A good place would be one of the starter bolts right to the frame. As suggested up a post or two.

Alwise done it is the clue. You have done a lot all ready suggested and it has made no difference.
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Old 05-31-2017, 05:25 PM
Richard Vyse Richard Vyse is offline
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If it has done it all along​, try the jumper cable trick. Put one end of the cables to the negitive post on both batteries and clamp the other ends onto the engine. If it cranks good put a ground strap on the engine to the frame. A good place would be one of the starter bolts right to the frame. As suggested up a post or two.

Alwise done it is the clue. You have done a lot all ready suggested and it has made no difference.
I haven't done anything as yet have not had the time.
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Old 05-31-2017, 05:30 PM
Paul Steinberg Paul Steinberg is offline
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How many miles on the engine? I had to replace the timing chain on my engine at 70,000 miles. If, when they did the tune up, they didn't check for a jumped tooth on the timing gear, then the timing would be too far advanced, and cause the hard starting problems. One way to check this, is to turn the harmonic balancer in one direction, with the distributor cap removed,, and keep turning until the timing mark is located at the 0 degree mark on the timing tab. Then, turn the harmonic balancer in the opposite direction slowly, watching the distributor rotor pointer, until it moves, and then stop. Compare where the timing mark is in relationship to the timing tab. If you find that it has moved more than 1/8" to 1/4", the timing chain has stretched, and most likely has jumped a tooth.
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Old 05-31-2017, 07:32 PM
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Quote:
Originally Posted by Richard Vyse View Post
I haven't done anything as yet have not had the time.
But you have new batteries ,cables ,tuned the engine. A lot of what has been sujested you have done. And it still nothing has changed. So the problem has to be something you have not done.
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  #19  
Old 06-01-2017, 03:18 PM
Richard Vyse Richard Vyse is offline
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Quote:
Originally Posted by Paul Steinberg View Post
How many miles on the engine? I had to replace the timing chain on my engine at 70,000 miles. If, when they did the tune up, they didn't check for a jumped tooth on the timing gear, then the timing would be too far advanced, and cause the hard starting problems. One way to check this, is to turn the harmonic balancer in one direction, with the distributor cap removed,, and keep turning until the timing mark is located at the 0 degree mark on the timing tab. Then, turn the harmonic balancer in the opposite direction slowly, watching the distributor rotor pointer, until it moves, and then stop. Compare where the timing mark is in relationship to the timing tab. If you find that it has moved more than 1/8" to 1/4", the timing chain has stretched, and most likely has jumped a tooth.
80,000 miles and not aware of having the timing chain being changed.
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  #20  
Old 06-01-2017, 10:37 PM
Walter Suiter Walter Suiter is offline
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Timing theory is real easy to prove or disprove with a timing light on that vintage.
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