First, I thank all of you that may be able and are willing to help me resolve this very irritating condition.

Vehicle Information: '98 2500 5.9 24V.

Problem Information: Pulled 3 codes: P0216 (discrepancy between the actual and the desired injector timing) P0234 (an overboost condition has occured) and P1693 (turbo charge control circuit malfunction).

Thinking Direction: It feels like the turbo just shuts off or a governor engages and drops my power and speed by at least 5mph. This started about a year ago at 70-75mph. It has been occuring more frequently and at lower speeds. Just today it occured at 30mph. I'm very convinced that I need to take some action very soon. I was thinking that it may be a sensor problem, but I haven't as yet located one. I'm hoping I don't have to replace the turbo itself or any control module.

Any ideas?

 

The computer that is built into the injection pump is failing, and the delivery valve. Once you get the 0216 you are sunk as that tells you the housing for the timing shuttle on the delivery valve has eroded to the point the fuel is bypassing and the timing is no longer able to be adjusted. The 1693 tells you that the injection pump controller is not talking to the PCM or ECM which happens when the pump computer fails because thresholds have been exceeded. The 0234 occurs because the computer now believes your boost is too much for the diminished fuel rate from the failed VP44 injection pump.

When you replace the VP44 either put on a fuel pressure gauge so you know you have adequate fuel to the VP44 to keep this from happening again, or pick up a $50 low fuel pressure warning kit from one of the good aftermarketers. If you do not, you will just repeat this in short order.

 

Thank you for the good news, now what's the bad news?

 

Ok, let's say I replace the VP44 (which I think is the pump, right?) and install the low pressure warning kit. Doesn't this problem mean I initially have a low pressure circumstance now, already? Do I also need to replace the pump in the tank?

 

....fp is no guarantee that the VP will live, but one of the factors you can at least keep an eye on to "hopefully" help it live a long life.

 

Since I have to invest in a new VP, is the stock unit best or is this a great time to put in a better aftermarket?