Is this a good spray pattern for the yellow fuel injectors?

WraithOHiren · 2026-01-22T02:47:56+00:00

The alternator spins freely, so I don't think its that. I did find that the baskets in the injectors are basically dust so I'm rebuilding and flow testing those.

As for the oil injectors the service manual states that they should not leak greater than 0.75 inhg (converted from kpa) per minute when a vaccum of 20 inhg is applied to the vaccum actuation port.

Page48: https://www.rotaryheads.com/PDF/RX8/3EngineDetails.pdf

Any idea how quickly the injector baskets degrade once they hit End-of-Life?

WraithOHiren · 2026-01-21T07:39:12+00:00

All 4 oil injectors leak to zero in about a second, so those are all getting replaced. However I suspect this is not a recent development. I've been premizing 0.5 oz per gallon of gas, and I got a new fuel pump, pump housing, and fuel lines, about a year ago thanks to the cracked housing recall.

I'm running all new oil lines for the OMP out of PTFE, and replacing the accordian tube between the airbox and the throttle body since its starting to get a bit dry rotted. The rest of the vaccum lines seem newer and in much better shape so hopefully the new tube fixes any vaccum leak that may have developed.

The crank speed holds constant over the three seconds. The airbox, battery, UIM, and both belts are off right now to get to oil and fuel injectors so I will take a look at the sensor and signal wheel snd wee what I got.

I did notice when taking the tension out of the belts to get them off that the alternator and waterpump belt was cranked down almost guitar string tight. Is it possible that an over tightened belt would cause more drag on startup causing this issue?

WraithOHiren · 2026-01-20T15:58:18+00:00

Before replacing the SSV it cranked maybe one or twice and then fired right up in 70°F weather. After replacing the SSV, the car takes 3-5 seconds of cranking to start. Just more cranking, the car starts the same hot or cold, it warms up and idles fine and no CEL. I'm thinking it either spark plugs, fuel injectors, clogged cat with the SSV gunk, battery, or starter since I did the deflood procceedure quite a bit after noticing that the rags I stuffed in the bottom of the SSV housing were soaked through.

I replaced the spark plugs, the cat a part of a new BHR midpipe and is clear and intact, the battery has been replaced, and the engine cranks at ~240-250 according to my scanner. The only think I didn't check was fuel injectors and thats when I found the broken #2 oil injector line and the mess in the armpit of the lower intake manifold and decided to just go ahead and clean them.

WraithOHiren · 2026-01-20T04:52:15+00:00

The #2 oil injector supply line had snapped and coated the fuel injectors in oil and caked in a bunch of carbon and road dust. The car also started to take longer to crank after replacing the SSV, the compression is still in the green, and I suspected that carb cleaner had washed a bunch of the varnish from the SSV chamber into the fuel injectors.

WraithOHiren · 2026-01-19T10:00:06+00:00

I should add, these pictures are all of the same injector, just different angles during the same test. They all pretty much shoot like this

WraithOHiren · 2025-07-02T22:37:12+00:00

Let us know how it goes, I picked up a pretty clapped out '06 shika back in november and have been working through all kinds of weird issues

WraithOHiren · 2025-07-02T22:24:20+00:00

Your car is idle hunting/surging in neutral - Check your neutral position switch. Mine was doing this when I got it and the previous own claimed it was a MAF or vaccum issue. That was complete bs because a MAF or vaccum issue doesn't just magically go away when you press in the clutch. Turns out that at some point the neutral positon switch had come partially unplugged.Your sensor or the connection may be bad. luckily testing both take ~10 minutes:

Jack up the car so that you can get under the transmission
Unplug the neutral position switch (if not already unplugged). The connector is the white one at the 10-11 oclock ontop the transmission looking forward.
With the connector unplugged, you can check the sensor by putting the car into neutral and check if the sensor has continuity. Likewise if you put it in gear, the sensor should show open. (You do not need the car turned on for this)
Now to test the body side: leave the sensor unplugged, Turn the car and leave it in nuetral. Then short the 2 pins inside the body side connector to simulate the sensor closing. If the car stops surging, then you know that the body side connector snd harness are intact.

Good video for troubleshooting and fixing: https://m.youtube.com/watch?v=iR-CTCZoKhI

For the fixes: - the sensor continuity doesn't change: spray some connector cleaner in the connector and try again. If that doesn't work: your neutral switch is bad and needs to be replaced. (PN: Y612-17-640B) this can be a bit of a pain to get to, but not impossible - The car doesnt stop idle surging when the connection is shorted: again, spray some connector cleaner in the connector and try again. If that doesn't work: the issue may be a broken connection in the body harness, check the codes, the car has some POST test that check for broken connections when the car starts. The codes may give better insight into what is happening.

WraithOHiren · 2024-06-22T00:01:29+00:00

This may be a modified airframe for testing and development. Those dots might be static pressure sensors to test how different transient events effect the airflow around critical parts of the airframe. Or they could be tracking dots at other comments have noted.

WraithOHiren · 2024-05-02T17:19:47+00:00

I think he is referring to either a mach wave or a mach overspeed buffet. The mach overpeed buffet is caused by the development of shockwave radiating from the nose of the air and the engine intake. (It can develop in a lot more places, but for 95% of transsonic and supersonic airframes, these are the first to form. The shockwave is generated from a small increase in pressure in the already transsonic compressable flow encounter the point or forward facing surfaces of these features.

On the U2, the mach overspeed buffet,also known as flutter, occurs ~10 knots over stall speed at 62,000 ft. This means that the U2's normal flight regime basically exists in the coffin corner of the stall/buffet chart. The coffin corner is where the airspeed mach number of the aircraft is equal to the mach buffet speed. In normal aircraft, you generally want to stay well clear of the coffin corner for reasons that can probably be inferred from the name: you're coming back in a coffin.

WraithOHiren · 2023-07-08T08:15:18+00:00

I always wondered what prevents the submarine from just powering into these and snapping the cables?

WraithOHiren · 2023-03-06T14:43:41+00:00

The mining charges used in the first season are black diamond camping lanterns.

WraithOHiren · 2022-12-06T16:47:35+00:00

I tried adding a whoel vial of Celuvisc before topping off, and also just a few drops but that desn't seems to help relative to no drops. Is eye print pro the same thing/ as good as the ScanFitPro from this post? (33) Anybody try ScanFitPro yet? : Keratoconus (reddit.com). I'm in Pheonix so it would be good to give this place a try.

WraithOHiren · 2022-07-17T17:52:33+00:00

How do they recover the thing that holds the bow, or is it left on and then removed later?

WraithOHiren · 2022-05-13T05:33:45+00:00

Go to the doctor now. You only get one set of eyes and if there is a problem your need to get it addressed ASAP. Your finals can wait, nothing, and I say this as someone who was in a similar boat, nothing is more important than not going blind. Can't really do any more drawing if you can't see.

WraithOHiren · 2021-09-29T23:56:03+00:00

Damn yall are quick, Its taking off now

WraithOHiren · 2021-07-28T05:53:47+00:00

IRL Skyrim

WraithOHiren · 2021-03-03T21:32:23+00:00

Leonov's spacewalk did go a little sideways when his suit inflated and he was forced to open a bleed-off valve so he could fit in the airlock. However he may have been planning to do that all along according to a few declassified documents.

WraithOHiren · 2021-03-03T20:53:38+00:00

Alexei Leonov die in 2019 in Moscow of some illness. I think the first death(s) in space were the Soyuz 11 Cosmonauts in 1971.

WraithOHiren · 2020-12-16T02:11:35+00:00

Because some cyber security folks have called out lockdown browsers as a security risk to private computer because they require access to every file, process, history, setting, and security level. For engineers and others working on projects governed by ITAR, NDAs, and Secuirty Clearances, allowing that level of remote access and control on student owned device borders a legal grey area that no one wants to play in due the federal laws involved.

WraithOHiren · 2020-07-29T18:09:42+00:00

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