[Shop-talk] Tricky problem with a GMC 3500

[Mike Sinclair]

And maybe the plug wiring connections.


On 11/21/2018 12:29 PM, RONALD GRIFFING wrote:
> I would check the distributor cap first.
>
>
> Sent from Xfinity Connect Application
>
>
> -----Original Message-----
>
> From: eric at megageek.com
> To: Shop-talk at autox.team.net
> Sent: 2018-11-21 11:57:12 AM
> Subject: [Shop-talk] Tricky problem with a GMC 3500
>
> 1998 GMC 3500 mason dump.  LOW miles ( 87K)  Gas engine
>
> When it runs, it is flawless.  Great idle, lots of power, no issues. 
>  Kept in heated garage.  Always on a battery tender.
>
> About 6 months ago (maybe longer as this truck is rarely used.)  when 
> I would first start it, it would idle way too low and stall.  I few 
> minutes of warm-up, and it was fine.
>
> Then, this past month, I had to move it to one of my out buildings for 
> about 3 weeks.  The building has lots of moisture (it will NOT stop 
> raining and now snowing here.)
>
> I went to start it up and it wouldn't start.  Engine turned over fine, 
> sounded normal, but it wouldn't start.  After I tried a  few times, 
> the engine would 'diesel' when I stopped cranking.
>
> I tried some starter fluid and it didn't change anything (so I thought 
> no spark.)  Battery was on a 'boost starter' plugged in the wall.  Gas 
> smell coming out of tailpipe.
>
> Checked spark, all good.  Under the hood seemed dry (there was no 
> condensation or anything) but the building had a wet floor.
>
> After some wrangling with a tractor, fork-lift, and a few new 
> vocabulary words,  I got it onto the main garage where I let it sit 
> over night with the hood up.
>
> So I tried it today and it started right up.  So this is clearly an 
> issue with the moisture.  My question is, where do I start to 
> troubleshoot?  I can't predict it being moist in the other garage (and 
> when it's there, it's away from all my tools etc.)
>
> ODBC tool has no codes.
>
> Any ideas on how to fix this?  I'd hate to be stuck on the side of the 
> road because of rain or something.
>
> Thanks!
>
>
> Sent from my Commodore 64 on a 2400 Baud Modem.
> Tech Viper
> "Be as beneficent as the sun or the sea, but if your rights as a 
> rational being are trenched on, die on the first inch of your 
> territory." Ralph Waldo Emerson
>
>
>
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