Anyone have any experience with this?
I have a 2000 M1088A1. The CEL light came on the other day and with CAT ET hooked up, it showed code 164-11 and/or 164-2. Looking them up reveals a somewhat generic trigger of mismatch between desired and actual injection activation pressure on the HEUI system. Scrubbing the internet, it appears that the HEUI pressure sensor or the pressure control valve could be the cause (and are the easiest/cheapest) place to start. To that end, I did replace the pressure sensor without resolving it, and I have a valve I will be picking up after I finish typing this up to see what it might do for me.
The symptoms are weird- the pump can't hit the LOW end of the pressures requested, and is rock steady on the high end. The lowest it would go on the CAT ET diagnostic check was ~1000 psi when 870 is called for. Stepping through the other pressures, it was right on where it should be and steady around that pressure.
When I ran it with the laptop hooked up, it was high when idling, but once any throttle is applied, it seems that called pressure goes right past the actual min and everything is happy. The only time it doesn't match up is when it's idling.
I did run it on a trip, and it ran fine, until it didn't. After a couple miles climbing through sand, it went into limp mode with CEL. Upon extricating myself from the backcountry, the results on CAT ET were worse- still wouldn't hit the low pressures but min was now ~2000-ish pounds (forget specifically at this point). After a bit of consultation, I did an oil change to 30w to see what that'd do because the locals were having a bit of an issue trying to obtain a control valve.
After the oil change, the pressures were all back in line with the exception of the min, again not dipping down below 1000 psi or so. I drove it around a bit and under normal driving conditions, things continued to line up except at idle, so I drove it home (UT to OR, ~1200 miles).
That's where/how it sits today. I will be picking up the new IAPCV (CAT p/n 122-5053) shortly and seeing if that does the trick. Anyone else have any experience with these symptoms?
I have a 2000 M1088A1. The CEL light came on the other day and with CAT ET hooked up, it showed code 164-11 and/or 164-2. Looking them up reveals a somewhat generic trigger of mismatch between desired and actual injection activation pressure on the HEUI system. Scrubbing the internet, it appears that the HEUI pressure sensor or the pressure control valve could be the cause (and are the easiest/cheapest) place to start. To that end, I did replace the pressure sensor without resolving it, and I have a valve I will be picking up after I finish typing this up to see what it might do for me.
The symptoms are weird- the pump can't hit the LOW end of the pressures requested, and is rock steady on the high end. The lowest it would go on the CAT ET diagnostic check was ~1000 psi when 870 is called for. Stepping through the other pressures, it was right on where it should be and steady around that pressure.
When I ran it with the laptop hooked up, it was high when idling, but once any throttle is applied, it seems that called pressure goes right past the actual min and everything is happy. The only time it doesn't match up is when it's idling.
I did run it on a trip, and it ran fine, until it didn't. After a couple miles climbing through sand, it went into limp mode with CEL. Upon extricating myself from the backcountry, the results on CAT ET were worse- still wouldn't hit the low pressures but min was now ~2000-ish pounds (forget specifically at this point). After a bit of consultation, I did an oil change to 30w to see what that'd do because the locals were having a bit of an issue trying to obtain a control valve.
After the oil change, the pressures were all back in line with the exception of the min, again not dipping down below 1000 psi or so. I drove it around a bit and under normal driving conditions, things continued to line up except at idle, so I drove it home (UT to OR, ~1200 miles).
That's where/how it sits today. I will be picking up the new IAPCV (CAT p/n 122-5053) shortly and seeing if that does the trick. Anyone else have any experience with these symptoms?
