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Old 12-04-2005, 09:42 AM   #4
stuzman
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Join Date: Jan 2005
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Re: Re: Re: 1994 Buick Lesabre won't start

Quote:
Originally Posted by jimwalker
Maxwedge,

Thanks for the reply! I asked for some help on another web site as well and a guy responded with very similar advice to yours. He also mentioned a noid light and the PCM. Did you mean the PCM or is the ICM something else? I found a noid light for $6 so that's not a problem, but what is the PCM and/or the ICM? He said that I should check the throttle position sensor first. According to him it had to be the TPS or something to do with the PCM. If the TPS checks good but no joy at the injectors with the noid light then he said the PCM. What kind of scanner are you referring to, is it something one could buy? Do you think the earlier symptoms when it was still running are related to it refusing to start now?

Thanks again,

Jim
PCM would be the power control module and ICM would be ignition control module. Yes, you can buy a scanner to monitor the RPM's as Maxwedge said. If you see RPM's on the scanner, it would let you know that the crankshaft sensor was developing a voltage that the ICM was seeing. It's just one more thing that you can get out of the way in diagnosis. I can't see how the TPS can create a no-start, but the scanner could quickly get that out of the way also. You can also check this sensor with a DMM.
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