Pretty excited! Thanks to Just at Lucky 8, I just pre-ordered my Terrafirma springs, shocks and steering damper. England: If you didn't have a bank holiday Monday I might get them a little sooner!

 

and not so much any longer.... either the scanguage is broke or my truck is seriously sick... scanguage was reading 4-7 MPG at 15 on the TPS.... wonder if the EVAP code is really starting to F up my MPG or if the scanguage has pooped (wouldnt be the first time i heard of one poopin out)

 

be more specific on what the problem is please - I am currently attempting to trouble shoot a problem with my poopy-running rover right now involving an EVAP problem.
I was thinking that if we are having the same signs/symptoms of sick rovers that we may have the same affliction.
thanks
brian aka pilsner

 

about once a month i get a evap code (large leak) code. have not had time to trouble shoot, besides replacing the gas cap twice which did nothing. there are no symptoms unless what my scanguage is saying is true... then again i also get a ABS rough road fault once a month or so that no one can figure out. not me, not my indie mechanic and not the LR dealer...

 

just found this about the 1592

DTC P1590-P1592: ABS - ROUGH ROAD SIGNAL CIRCUIT MALFUNCTION
Description
When the vehicle travels across rough terrain, or on rough roads the ECM could falsely interpret suspension vibrations as a misfire and invoke engine misfire protocols and/or set a false DTC. The Self-Leveling and Anti-Lock Brake System (SLABS) ECU sends a rough road PWM signal to the ECM. Based on this rough road PWM signal, the ECM can suspend misfire detection for as long as the vehicle is travelling on a rough road.
Rough road signal input is measured at ECM 40-pin connector C0637 terminal No. 34 (Red/Green wire on Discovery; Yellow/Pink wire on Range Rover). The SLABS ECU rough road PWM signal varies in accordance with changing road conditions. The rough road PWM signal operates at a frequency of 2.10-2.56 Hz. ECM rough road control is based on specific changes to the PWM signal. If there is a rough road PWM signal failure the Hill Descent Control/Anti-Lock Braking System (HDC/ABS) warning light may be illuminated.
Diagnostic Aids
The rough road PWM signal can fail in the following ways:
Harness or connector damage.
SLABS wheel speed sensor failure.
If there is a rough road signal malfunction, the following DTCs may be set:
If DTC P1590 is set, there is an ABS rough road signal circuit malfunction. Hardware is okay, but the SLABS ECU is sending an error signal.
If DTC P1591 is set, there is a low ABS rough road signal circuit. Signal from SLABS ECU is shorted to ground.
If DTC P1592 is set, there is a high ABS rough road signal circuit. Signal from SLABS ECU shorted circuit to battery voltage.
Diagnosis & Repair
When ignition is turned on and during vehicle operation, ECM checks rough road signal circuits. If expected signal is not seen, ECM will store a DTC. Using an oscilloscope or Snap-On(R) PAC ensure SLABS ECU PWM signal indications are consistent with road conditions. See ROUGH ROAD PWM SIGNAL INDICATIONS table. If PWM signal is not as specified, check circuits for opens or shorts. Check for poor power and ground connections and/or loose wires at ECM. See WIRING DIAGRAMS article. Ensure ABS wheel speed sensors are operating properly. Repair as necessary. When DTC P1590-P1592 repairs are completed, perform REPAIR CONFIRMATION DRIVE CYCLE "A" .