First, the rule of general troubleshooting kicks in: What changed
last? i.e. did you wash your engine compartment? did you dress up some
wiring or reroute it? Did you do any work on the truck recently after
which the symptoms appeared? Could you possibly have caused this? Not
ragging on you, its just that most 'mysterious' problems end up with a
sensible explanation and very often stem from something that you may
remember if you really think about it.
I'd check the MSD wiring very carefully. You might have an intermittent
short that not only screws with the MSD, but resets the computer?
This is all guessing but I hope it helps.
Marty
Chuong Nguyen wrote:
>
> Okay, the whole problem with it backfiring just got WORSE. It only did it
> that one day for about 10 seconds, but this time it kept up for about 10
> minutes. I noticed that the backfiring/ popping noise occurs mostly at low
> rpms (under 2k) and it's only at 3/8 of throttle or more. The truck seems
> to run fine if it's less than 3/8 of throttle. Otherwise, it seems like
> everything is just backfiring and ah... it's not good.
>
> IF you have any ideas or suggestion on what I should replace/clean, shoot me
> a e-mail.
>
> I got a code 12, 43, and 55 with the on-off-on-off procedure
> 12=battery to pcm was disconnect (but I haven't in a LONG time, always get
> it)
> 43=misfires (duh)
> 55=end of codes or something.
>
> Also, something weird. I have the MSD digital 6 and instead of a blinking
> LED that blinks with every ignition fire, it now blinks once every second
> after start up, is that normal?
> -Chuong
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn.com
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:02:03 EDT