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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