Michigan Rotary Club
Generation Specific => RX-8 Generation Specific => : RotaryBC September 09, 2018, 10:58:41 AM
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Groll69 and me did a compression check on the white 8.
It was low compression, so i thought "I will drive it until it won't start cold"
It has bigger problem, check out the pic!
This was after driving to and from Groll69's, 30 Miles round trip
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mmmmm, milkshake
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Dam that isn't good. Engine is definitely due for a rebuild.
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Reminds me of my last engine, just curious, how does the coolant look?
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I would take a look at the coolant. You can get the milkshake from only running the car for a few minutes at a time. If it doesn't get hot enough to vaporize the normal water that builds (ie, trips under 5 minutes or moving around the house)up it can cause this.
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The add https://detroit.craigslist.org/mcb/ctd/d/2005-mazda-rx-8-repairable/6676849534.html
I drained the oil, changed the oil filter, filled to the line on the dipstick.
De-fooding procedure, got it started, drive it about 1.5 the first day.
Next two days I started it and drove about 3 miles each day.
Saturday I drove it to Groll69's 30 miles round trip, did the compression check, low, on the way back I tried the heat, it didn't blow hot.
Sunday I filled the coolant tank, planned on changing the oil one more time, that's when I checked the oil, and found the "milkshake".
I cleaned the dipstick and checked agained, I didn't see any oil on the stick the first or the second time.
Looking at the coolant it does't have any oil in it
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I changed the oil again no milky oil, drove it 10 miles, checked oil, no more (none) on dipstick.
It now starts when warm! ;D
It does have CEL P0410 Secondary Air Pump, the Air Pump does sound sick.
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the bearings shit out on those things. I removed mine since I don't have a cat anyway
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Hopefully it's resolved now, however I'd keep checking daily to see if it comes back up again, especially if it's a small leak.
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Saturday I drove the parts car to High Octane Cafe', 50 miles round trip.
I had 30 miles on a fresh oil change.
Before leaving, checked oil level (full mark) and coolant level, both were good, .
When I returned, checked oil and coolant again, the coolant level good, but the oil level was way past full to the point could not see the level, and a strong gas smell.
Does this sound like a stuck open injector?
Would it be a good move to change plugs, wires, and coils before doing anything else?
Then change the oil and see what happens.
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The path for fuel to get to oil is past the side seals and then oil control rings. Does it seem like it is burning excess oil too?
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Doesn't seam to be burning oil.
I might as well pull the engine, and get it over with :(
It was always to be a parts car.
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That sounds like a lot of fuel, are you sure it wasn't coolant? How many miles are on that engine?
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Its fuel and as you say a lot.
I was thinking it may be a stuck open injector.
The service manual procedure it to check the PCM signal first with an oscilloscope, I don't have a scan tool that can do that or remember how to use an oscilloscope :-[
If that's good pull the injection module out as a complete unit, which means pulling the intake manifolds off.
Once the intake manifolds are removed there's just few more steps to remove the engine for the rebuild, right?
I kind of feel like the guys on RX8.com, it's not low compression it could be this, or change this.
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If it is indeed fuel, then like ITSWILL said, side seals and oil control rings are toast. I'd also assume compression is gone too though, if it's that bad. I haven't heard of RX8's having injector issues like the older injectors on the old FC's, but I guess anything is possible.
How are hot starts and cold starts? Those are a good indication of compression and potential flooding problems.
Once you have the intake off, you'll have to disconnect the trans (either from the drive shaft or from the engine), engine mounts, all wiring, fuel, water and oil and bunch of small things. From there it's not too difficult, but you've gotta commit though.
If you do rebuild, I'd see what you can do to convert that engine to a 6 port 13BMSP instead of the 4 port version.
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When it was for sale in the description:
Will not start, oil overfilled, gas in oil
I changed the oil with MotorCraft 5W20 blend, it wouldn't warm start at all, I saw froth on the dipstick, after returning from Groll69 house.
I changed the oil again, the oil was not frothy, and used Valvoline 5W30, it would warm start then.
When I returned from High Octane was when I found the gas in the oil, I had 80 miles on the oil change.
I never thought about 4 port to 6 port. will research on RX8.com
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I have never seen an engine out of an 8.
Are the oil injectors in the housings or intake?
I would think I needed a 6 port engine and a PCM with 6 port tune. Not to mention AT or 6Speed.
I would think the tuning of these engines have been figured out, but the post on RX8 don't sound like it.
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the injectors are in the intake manifold just before the engine keg.
Everything I have seen about tuning used a Cobb access port which is no longer available new.
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Yeah, i'm not sure what would be involved, but if it's too much of a hassle then probably not worth it. But if it were me, I'd try and get as much power out of an RX8 as possible. You'd definitely need the intake system, ECU, and all that jazz.
I thought the oil injectors were on the rotor housings?
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oops, yeah they are. I was thinking fuel injectors