My vacuum is 12.5" - 13.1" at idle.
The fuel-sync was set roughly with an ohm meter at the transition point.
Haven't been able to get it set by a real scanner yet.
In a message dated 6/18/2003 9:34:27 PM Eastern Standard Time,
bernd@texas.net writes:
> PCM is relearning your mods after 100 miles.
>
> What's your vacuum at idle and what's the fuel-sync set at?
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
> JAMEPC@aol.com
> Sent: Wednesday, June 18, 2003 7:15 PM
> To: aol@dakota-truck.net
> Subject: RE: DML: O2 code/Fluctuating Idle
>
>
> My PCM thew the following code: 52 Sustained rich mixture exceeds range
> of
> control. Also at the same time, the RPM's started fluctuating. At
> idle, it
> fluctuates 200 RPM and I can feel it hesitate on acceleration. The O2
> sensor has
> been replaced and it still throws the same code. Below are my specs.
> Thanks, James
>
> 93 CC, 5.2, Rebuilt engine 30 over, 604 Competition Cams:lift .512
> dur@.050
> 210, 220 / LSA 112, Heads ported/5 angle , 2bbl M1 Intake, Jet Hot
> Coated
> Thorley Headers, Ported TB, True Duals w/ FM 70's and Cuda Tips, MP PCM,
> MP Cast
> Valve Covers, MP Cast Air Cleaner, K&N Filter,MP DRT Chain, MSD 8.5mm
> wires, MSD
> 6T, Blaster coil, Underdrive Crank Pulley, APS 46 RH Transmission w/ All
> The
> Options, MP Torque Converter, Viper Fan, Lowered 2-3. Energy
> Suspention body
> mounts, A arm bushings &sway bar bushings, 4.10's W/ Dana Spicer Trac
> Loc,
> Road Master Active Suspention, Doestech Shocks, Front and Rear Anti Sway
> Bars,
> Cowl Hood, Sir Michales Roll Pan.
>
> Update:
> The above problem was resolved when I disconnected the battery to do
> some
> engine work. The PCM was reset, the code went away and so did the
> hesitation and
> flutuating RPM's. For some reason, I think it going to come back after
> a
> couple hundred miles. Any ideas what would cause this
> ?
> Thanks,
> James
>
>
>
>
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