Empty HPOP reservoir and codes,

[Mollieandgil]

Ok folks,

My 96' has developed a hard start problem. Finally it set a couple of codes:

P1212, Injector Control Pressure lower than expected (engine cranking)

P1211, Injector Control Pressure beyond desired (engine running)

I replaced the ICP, not because I thought it was the problem, but because it broke when I was trying to unplug it.

There is a very, very tiny bit of oil on the IPR plug.

There is no oil in the valley. Well, no more than normal, cruddy oil on a motor this old. No fresh, clean oil.

The HPOP reservoir was completely empty.

Yes, the oil level is full. Yes, it has recently beeen changed. No, this isn't a glow plug issue, or a dirty screen.

I topped off the reservoir and it still cranked for about 7 seconds before it started, but it didn't set the Check Engine Light this time. I shut it off and it would crank for 2 or 3 seconds and restart.

It runs great once it starts. I have a set of Bean's 175's and a T Wildman's burns on a TS 5 position chip, and it'll set you back in the seat just as it always has. It doesn't have a power issue. Just a start issue.

However, as most of you know, with the injectors and chip with the original HP oil pump, you can set the CEL whenever you want to. Could it be that the pump is simply worn out and letting the reservoir drain? Is that even possible?

I'm going to let it set overnight, then check the reservoir again tomorrow afternoon.

Any suggestions as to what the problem may be?

[Mollieandgil]

I think the empty reservoir was from cranking the engine and it not starting, though I'm not sure. As I said before, it started and I ran it a few minutes and shut it off. That was the day before yesterday, and it was still full yesterday, so it doesn't appear to be leaking.

Could this be an IPR problem? I have a IPR o-ring kit and am comtemplating taking it out, disassembling it, cleaning it, and reinstalling it.

Thoughts anyone?

[Patrick Feeley]

Could be an IPR problem, but do a real good inspection on the IPR wiring around the fuel bowl. Leaking fuel can really mess up the wiring. Cheers!

[Mollieandgil]

Problem sovled! Here's the update.

Replaced the IPR with a brand new OEM, $134 shipped from an ebay dealer. Now it starts like it used to.