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Car Forum / GMC Cars / January 2006

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86 GMC truck being a problem child

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ChevyGirl - 03 Jan 2006 16:56 GMT
About two weeks ago, my truck started having problems. It began to start
rough, it would barely idle until you revved the crap out of it, and the
fact that our exhaust is shot probably wasn't helping. Yesterday I went to
start it, and it fired up, idled sadly for about three seconds, and died.
Try to fire it back up, but it just cranks and cranks. So I figured it
must be a spark problem since there was tons of gas - and sure enough, I
had really weak spark. We're talking barely a flicker of orange. So I
replaced the rotor and dist.cap. Nothing. No spark at all from anything. I
have a really, really bad feeling that it's my coil, but I thought I would
ask around and see if anyone else knew something else it could be.

Any suggestions would be welcome! Thanks!
Adam - 03 Jan 2006 17:58 GMT
On that year, that could be your only other logical solution to the problem,
take off the coil take it to autozone and see if they can test it.  If not
they arent much just pick one up. Either that or the ignition module is bad,
that is if it has electronic ignition, some do some dont, could be the
points in the distributor.

> About two weeks ago, my truck started having problems. It began to start
> rough, it would barely idle until you revved the crap out of it, and the
[quoted text clipped - 8 lines]
>
> Any suggestions would be welcome! Thanks!
Al Bundy - 03 Jan 2006 23:01 GMT
" Either that or the ignition module is bad,
> that is if it has electronic ignition, some do some dont, could be the
> points in the distributor."

Points! Really?
I enjoyed that.
N8N - 04 Jan 2006 00:30 GMT
no points in '86, should all be HEI by then.  Actually I think HEI was
introduced in trucks maybe 1974-75?

nate

> On that year, that could be your only other logical solution to the problem,
> take off the coil take it to autozone and see if they can test it.  If not
[quoted text clipped - 14 lines]
> >
> > Any suggestions would be welcome! Thanks!
Adam - 04 Jan 2006 00:52 GMT
All I know is a friend of mine has a 77 with the old type distributor

> no points in '86, should all be HEI by then.  Actually I think HEI was
> introduced in trucks maybe 1974-75?
[quoted text clipped - 29 lines]
>> >
>> > Any suggestions would be welcome! Thanks!
Paul - 06 Jan 2006 16:55 GMT
  On a car that old, change the pickup coil, and the radio Interference
Capacator [ condenser ]  A new module makes sense, usually a weak module
will allow starting, but cause poor hi speed response.  Age wise, I'd
say pickup coil and RFI cap, as a "good" module doesn't " wear out "
 
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