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Finally got some more time tonight after work for some more diagnostics, and I have continuity from both wires on the spill valve plug, to all 11 wires on the plug on the passenger side of the engine, just in front of the valve cover. This includes the part of the harness that goes to all four...

Yes, I disassembled and cleaned the entire HPFP. My primary goal was to look for evidence of wear and tear or malfunction. None were present whatsoever. I’ve taken it down, cleaned and inspected the pump several times over the years so I’m very familiar with it and there wasn’t a single thing...

OK, thanks for the info on that! I was unaware that there was a difference between mobile devices and PCs I wouldn’t trust the old autotechs that created over $1500 of parts cost last time between troubleshooting and injector cleaning and replacements, so I’m out of luck there. Also, it doesn’t...

I have a similar issue to the OP that I’ve been trying to troubleshoot for the past week, scouring the forums and I really have run out of solid directions to go in. When I do a cold start up, I have solid 1500psi that slowly drops down during warm-up as it should. if I blip the throttle once...

My PCV hose coming from the OCC was split about 3” from the manifold so that turned out to be my lean idle. Thanks guys!

OK that’s a very good point. I’ve got tunnel vision for the fuel pressure because I’m seeing a similar thing with a AFR’s‘s, as I did last summer so I welcome the thought of it not being fuel related. I am taking it to my work tomorrow to try to troubleshoot the problem and hopefully get...

Rather than opening a new thread, I’m having a similar issue (AGAIN) as the OP. A couple of you guys helped me with this last summer so you may remember. The engine was misfiring and running, lean all the time, and it ended up being bad HPFP internals and a clogged injector. Replaced the MAF...

It took 8 to 10 heavy whacks with a 3Lbs sledge in a vice to separate the piston from the collar. No visible scoring or damage to either piece but I would never trust them so they got replaced. I ended up having to send the injectors out to injector RX after being dicked around for two weeks...

Ok. Good to know that internals have at least been known to fail. It’s inconceivable to me that metal flakes didn’t travel downstream to the injectors so I started the project of pulling them back out, so that will be done tomorrow. I found a local shop that can turn them around in a couple days...

Compression left to right 178 180 178 178 Cylinder 3’s new spark plug with about 1hr of idle time doesn’t look like it’s burning anything. The other three look rich as if the fuel system is compensating for an injector that’s not firing. I’ve confirmed cyl3 does have spark just as strong as the...

So another thing I might add is when I removed the spill valve from the high-pressure fuel pump housing there was noticeable metal flakes at the bottom of the bowl mixed in with the fuel. I’d like some input from you guys on this but one hypothesis I have is that the autotech piston is seizing...

I was idling it in the shop for almost 45 minutes doing diagnostics with the scanner so the coolant had already cycled back-and-forth from 190 to the 217° radiator fan kick on. I believe it was at 192 when I did the PRV test several times. I am still having the same problems as I did from the...

Ok so, Snapon guy comes to my work every Monday so I borrowed his triton scanner in the hopes of being able to control injectors independently and identify the one that isn’t working if indeed that’s my issue. No luck on being able to do that yet but I happen to do the PRV test again now that I...

Ok that’s great news that I can reuse the CS injector to block seals, and I got the GB’s from rockauto for top of the injectors last august when I installed the engine so I’m confident that those will be fine. If I have time tomorrow after work, I’ll warm her up and do the comp. and leakdown...

Ok, So I spent Friday night and yesterday working on the car at work. Replaced the PRV and no change, so then I installed the MAF and downstream o2 with no luck, then I pulled the spill valve and it was fairly dirty. So I removed the HPFP and completely disassembled and cleaned it and the spill...

The one thing that has me wondering if there isn’t something else going on in addition to the PRV is it doesn’t idle well even when HPFP Is maintaining 400+psi. Is that common in this scenario?

Sorry I was doing house duties and car diagnostics at the same time yesterday. And yes the engine was hot. I had just finished test driving it prior to the tests. First I tried a couple KOEO just shutting it off at idle (HPFP act. Pressure 350-420’s). 57-58 psi immediately after shutting down...

The ITFP is putting out 57psi I’ll do the pressure relief valve test now As soon as I turn the key off the pressure immediately goes down to 57/58psi and stays there. Never climbs @Awafrican does that sound like the fuel pressure relief valve being stuck open? I certainly hope so because...

171k and 20k on sp63 engine. The car has been my daily driver for the past 5 years. Last week OMW home from work the car started stuttering under a load and the idle is a little off. There’s a slight popping you can hear coming out of the exhaust when idling. No abnormal KR while driving. When...

Old thread I know, but for the community as a whole… Depending on what your issue was with the a/c compressor, the bearing went out on my gen1 a/c compressor clutch a couple years ago which lead to a loud bearing grinding noise with the engine running that would dissipate (to a point) when...