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89 New Yorker won't start


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6 replies to this topic

#1 utahtenorsax

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Posted February 18, 2010 at 10:47 am

My 1989 Chrysler New Yorker Landau (3.0 liter V6) won't start. The engine cranks, but there is no 12V at the coil, even while cranking. I have checked all plugs and connectors, the fusible links and the ASD relay. The battery is up and the cables and spark plugs are good. I suspect the ignition reference sensor in the distributor or perhaps the computer itself, but hate to go on an expensive shopping trip if there is something I've overlooked. Is there a way to check the ignition module?

#2 valiant67

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Posted February 18, 2010 at 10:53 am

Have you verified the distributor is spinning and therefore the timing belt isn't broken?

For the optical distributor diagnosis, I'd look here:
http://www.allpar.com/fix/optical.html

#3 Bob Lincoln

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Posted February 18, 2010 at 10:54 am

Check fault codes: http://www.allpar.co...odes/index.html

On these cars, when the ignition is on, there is always steady 12V at the positive primary coil terminal, and the negative terminal gets switched on and off while firing.

#4 utahtenorsax

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Posted February 18, 2010 at 12:34 pm

Have you verified the distributor is spinning and therefore the timing belt isn't broken?

For the optical distributor diagnosis, I'd look here:
http://www.allpar.com/fix/optical.html


Yes, the distributor is turning. The timing belt is not broken. The link provided a procedure for checking the pickup. The pickup appears to be bad because it does not switch between 0 and 5V. Because I live in southern Utah, I have to wait for the next wagon train to get a replacement (tomorrow), so I'll let you know if that does the trick. Thanks for the help!

#5 Bob Lincoln

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Posted February 18, 2010 at 03:49 pm

What did you get for fault codes?

#6 utahtenorsax

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Posted February 19, 2010 at 01:18 pm

Check fault codes: http://www.allpar.co...odes/index.html

On these cars, when the ignition is on, there is always steady 12V at the positive primary coil terminal, and the negative terminal gets switched on and off while firing.

I know that's what the book says, but I measured nothing on the positive side of the coil whether cranking or not. I also didn't have a way to access the computer to see if there were any error codes.
It's a moot point, however, because valiant 67 and you provided enough information to steer me in the right direction. After replacing the ignition pickup (which arrived on this morning's Wells Fargo stage), this money pit started right up and is purring like a kitten. Much MUCH thanks to you guys for your help. It is genuinely appreciated.

#7 Bob Lincoln

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Posted February 19, 2010 at 03:01 pm

Great news! And the reason you got no 12V on the coil is because of the defective ignition switch. It also prevented access to codes, but now that it's working, that won't be an issue in the future.


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