I didn't notice any side to side play. There was a slight bit of rotational
play, though not much. The backfire occurs whether hot or cold whenever I
decelerate, as in let off to shift gears or to coast down a hill etc. I
checked and replaced the plenum gasket. I also replaced the header gaskets.
I had a couple of leaks there from cheap gaskets. Sometimes it is more of a
burble or a rumble than a backfire, but occasionally it will pop pretty good
out the tailpipe. I'm pretty much out of ideas. The only thing I have not
done is checked the timing chain/sprockets for excessive play. I have the
chain and sprockets, I just haven't had time to replace them.
""Bernd D. Ratsch"" <fasstdak@hotmail.com> wrote in message
news:000301c4519f$2c6f2d30$020aa8c0@bernd...
>
> Was there any play side to side on the rotor shaft? If there was, you've
> got a worn out drive bushing (down in the block) which can cause the
> problems you're describing. There will be a little bit of play while
> turning, but not a whole lot.
>
> Yes, some PCM's were different...even today. Example: You can retard the
> timing with the DRB (Misc Options Screen) on some '97-'01 models (bitchin
> feature for blower motors) but not on all...don't know why either - it's
> random. Mine does it and I've retarded the timing up to 6 degrees just to
> play with it...set it back to "0" though.
>
> On the backfire, is it at all times or just when it's cold? Also - easy
> test to see if the plenum is leaking (which can also cause lean-out
> backfires): Remove the airhat and put your hand over the top of the TB.
If
> is doesn't suck your hand down tight and still runs after 10
seconds...it's
> leaking. (Was actually able to put my hand over the top of a Durango TB
and
> it still ran for more than a minute - very bad plenum leak.)
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of BlackDak93
> Sent: Sunday, June 13, 2004 3:03 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: DML: Re: RE: Re: RE: RE: Setting Distributor Drive Timing (Fuel
> Sync) without DRB
>
>
>
> It seems every answer brings up another question. Bernd, you mention that
on
> some 94 and older models, you can't set the sync with a DRB. Is this
because
> of the PCM, or something different with the engine itself? I assume it has
> something to do with the PCM, since all the distributor components are the
> same. The reason I ask is because my engine is out of a '95 Ram. My Dakota
> is a '93 with a '93 Ram PCM (manual transmission). This morning I was
able
> to pull the distributor and oil pump drive out and rotate it to
> approximately the 5 O'clock position. I then followed your procedure to
set
> the fuel sync. One thing I noticed is that there is a few degrees of
> rotation either way before the voltage level switches. I tried to set it
> about in the middle. It didn't help my backfire problem, but it seems to
run
> and idle better.
This archive was generated by hypermail 2b29 : Thu Jul 01 2004 - 00:15:16 EDT