If possible, obtain a air/fuel analyzer and install it. I suspect you are
running too lean for the increased timing. If so, you need to increase fuel at
4000 rpm. That can be accomplished by replacing the PROM by a qualified dealer.
Allen
Sam Parthemer wrote:
>
> Drop in a 180 degree STANT thermostat. Check the DML
> page for p/n and a complete 'How to' courtesy of Jon. I have roughly
> the same setup as you, and experienced the same problem. Putting
> the 180 F. Tstat cured about 95% of those pings... The other 5%
> will only go away (so far) by adding 104 Octane boost.
>
> Sam '95 SLT
>
> -----Original Message-----
> From: JeffofSLU@aol.com <JeffofSLU@aol.com>
> To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
> Date: Thursday, December 17, 1998 4:08 PM
> Subject: DML: MP SBEC, bad pinging problem, please help!
>
> >DML,
> > I just installed the Mopar Performance computer in my '95 V8 auto. After
> >installation I took it for a test spin. The first time that I got on the
> gas
> >from a dead stop I thought I heard 2 or 3 tapping sounds, but I wasn't
> quite
> >sure. These occured around 4000 rpm. I drove it around another 5 minutes or
> >so, and got on it again from about 45mph. I immediately heard what sounded
> >like a drum solo of pinging coming from my beloved 318.
> > What's the story with this? I thought that running 93 octane (Mopar says
> the
> >computer requires 92) would satisfy the computer's needs. I can't see that
> >anything I've done to the truck so far (headers, MSD, cat-back, pulleys,
> K&N)
> >could even contribute much less cause this problem.
> > The only possible solution that I can think of would be to install a lower
> >temp thermostat, but what temp should I go with? I know that running the
> >engine at too low an operating temp can result in as much damage to the
> >engine as the pinging and detonation. Has anyone else had this problem? If
> so,
> >please tell me how you dealt with it. Thanks in advance.
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