Join Date: Oct 2010
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i found the injector harness ground wire not connected, but I don't think that was the problem because the problems started before we did all the work to the engine.
The problem did seem to start after we replaced the ficm that was bad several weeks ago. That being said, I took some heater hose and placed under the plugs on the ficm to keep them pushed up into the ficm. All the plug locks are broken (to be expected on a truck that old and a 16 year old that pulled them off to change the ficm). So far after several days we have had no further problems. I will re-attack if we have any more problems.
All of this work has definitely made me want to recommend to anyone out there that they try to fix a lot of these problems themselves. It's not really hard, just time consuming. I can remove the turbo in about 20 minutes now. that leaves the HPOP accessible. I paid 2K a few years ago to have that replaced before I had any knowledgeof the engine and had no time to fix it. When I pulled it all apart this time, I have to say that I am suspicious that they did not replace the pump, but only replaced the IPR. The pump housing still had all the crud at the seam of the housing and the block that looked like it had never been opened up before.
Does anyone know if the HPOPs have a serial number on them that can be looked up to see if it's original? I'll give them the benefit of the doubt until I have to replace it again and then will look very closely at the pump.