Originally Posted by tiptoe
(Post 4233176)
Has anybody attempted to relocate the omp?
For example a top mount turbo manifold will cause damage to it Is it possible to just move it to another location and have lines for oil running down to the original location? Problem is it is gear driven at the front cover....what are you going to use to turn it? |
I don't know. I have never taken it off to look. Just random theorising
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I'm having a problem with too much oil consumption.
I just got an oil change and 146 miles later my oil light came on and I'm at the bottom line on the dipstick. I changed my plugs yesterday and two of the, we're oily but all four were black. My compression is good. Had it tested last week which leads me to believe its not an internal problem. Could the OPM be open too far which is causing it to burn too much oil? If so where should it be positioned? I've been searching all day and can't find any answers to my questions. |
I'm having a problem with too much oil consumption.
I just got an oil change and 146 miles later my oil light came on and I'm at the bottom line on the dipstick. I changed my plugs yesterday and two of the, we're oily but all four were black. My compression is good. Had it tested last week which leads me to believe its not an internal problem. Could the OPM be open too far which is causing it to burn too much oil? If so where should it be positioned? I've been searching all day and can't find any answers to my questions. |
Originally Posted by t.swain
(Post 4276770)
I'm having a problem with too much oil consumption.
I just got an oil change and 146 miles later my oil light came on and I'm at the bottom line on the dipstick. I changed my plugs yesterday and two of the, we're oily but all four were black. My compression is good. Had it tested last week which leads me to believe its not an internal problem. Could the OPM be open too far which is causing it to burn too much oil? If so where should it be positioned? I've been searching all day and can't find any answers to my questions. |
Originally Posted by t.swain
(Post 4276773)
I'm having a problem with too much oil consumption.
I just got an oil change and 146 miles later my oil light came on and I'm at the bottom line on the dipstick. I changed my plugs yesterday and two of the, we're oily but all four were black. My compression is good. Had it tested last week which leads me to believe its not an internal problem. Could the OPM be open too far which is causing it to burn too much oil? If so where should it be positioned? I've been searching all day and can't find any answers to my questions. If you suspect oil your OMP being problem, you can try swapping OMP lines/injectors from front to back, running new or clean spark plugs and see if oily plugs will move too, or if they stay same.....if they move, problem is OMP or oil injectors, if they stay, its internal engine problem... Fastest test would be just blocking out OMP lines for few minutes of engine running with new/clean spark plugs.....if you still will get oil on spar plugs, its rebuild time...... |
Has anyone tried restricting the vaccum line to the OMP to increase flow? They talk about it in his tread, just thought....
https://www.rx8club.com/showthread.p...&highlight=OMP |
^^when in Tardville, do as the Tards do ....
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:lol2:
Originally Posted by TeamRX8
(Post 4277265)
^^when in Tardville, do as the Tards do ....
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I was specifically referring to that thread and commented there appropriately
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^word understood....
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So does anyone conclusively know what the max safe or effective number to use in the oiling map table? This post https://www.rx8club.com/showpost.php...&postcount=173 seems to give that number as 60. However in this one, https://www.rx8club.com/showpost.php...&postcount=150 Delmeister indicates an *assumption* that 60 is max. I'm not entirely sure where that assumption stops. Naively, I scaled entire table by 1.33 which means my new max was 80. There don't seem to be any ill effects so far, but if more than 72 steps disengages the stepper gear, I'm also rather wondering if something bad may have happened without me noticing yet. Oil consumption does seem to be up quite a bit over the stock map, but I've only driven ~ 600 miles since the change.
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RT will let you scale it up to 100 maximum
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RT will let you, but it seems not to be the right thing to do. Threads for reference around this area: https://www.rx8club.com/showpost.php...1&postcount=21
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about to start researching the position sensor for the RX8 OMP, getting a lot of inquiries for them and Mazda doesn't sell this separate from the OMP. Seems rather nonsensical to make people pay $1500 for a new OMP just to get a sensor.
both the OMP and sensor are made by Mikuni. I have two sensors with slightly different part #s. The part # is on the side of the sensor facing towards the rear of the car. Would like to collect some more #s to see if there is any general commonality between them if anyone else can contribute. Thanks. |
I will check the part numbers on my sensor when I get home, I have a broken one off the car. Luckily a member on here had an extra I just received I'll check that one as well. I'm also going to take some resistance readings. I want to also go pick up the TPS (from the Mazda KL series V6) that look identical to the omp sensor, and get resistance readings off that part as well to see if it's usable.
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Originally Posted by TeamRX8
(Post 4432865)
about to start researching the position sensor for the RX8 OMP, getting a lot of inquiries for them and Mazda doesn't sell this separate from the OMP. Seems rather nonsensical to make people pay $1500 for a new OMP just to get a sensor.
both the OMP and sensor are made by Mikuni. I have two sensors with slightly different part #s. The part # is on the side of the sensor facing towards the rear of the car. Would like to collect some more #s to see if there is any general commonality between them if anyone else can contribute. Thanks. Every so often the computer directs the pump to go back to zero (and probably sends a few more pulses to make sure it is hard against the stop). It then runs the pump up to 52 or so steps and looks for a change in the state of the switch. If it detects the change within its allotted step window, it's good to go and starts controlling the pump keeping track of the steps. |
Yes, I likely have as much info compiled on the OMP as anyone. Regardless of what you want to call it, there is still a need for a cost effective replacement.
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Originally Posted by TeamRX8
(Post 4432865)
Would like to collect some more #s to see if there is any general commonality between them if anyone else can contribute. Thanks.
One on car from JDM (not that it matters) '04 4 port M/T: 434533 One sent to Bose originally on a '05 4 port A/T: ?? |
Thanks again, I'll report back if this one works. Haven't had time to install it yet.
It shouldn't matter if it's from an AT and mine's MT, should it? |
Originally Posted by bose
(Post 4433040)
Thanks again, I'll report back if this one works. Haven't had time to install it yet.
It shouldn't matter if it's from an AT and mine's MT, should it? Plus if it doesn't work, for whatever reason, I have another I can send from a 148,000 mile 6 port. The sensor is fine but the pump itself is past it (but didn't throw any codes either...). Break. Team: the closest I found after about 45 minutes of keyboard-commando'ing it on the taxpayer's dime was a TPS from a Grand Vitara / Chevy Tracker. P/N 91175256. Form factor is similar but not 100% the same. Eyeballing it, the part where the sensor interfaces with the MOP on the Tracker TPS looks to be of a larger diameter than the one on the RX8 MOP. According to the internets: 0.5 – 1.2 V Ignition switch turned ON and throttle valve at idle position with warmed engine 3.4 – 4.7 V Ignition switch turned ON and throttle valve at full open position Mazda was clueless when I called. I think I confused the operator at Mikuni American when I said "metering oil pump." She transferred me to Carburetor sales. ha ha. I'll keep looking. |
Got through to Mikuni's Chicago office, the answer I got from them was "due to liability reasons, we can't recommend that you use the RX8 MOP position sensor on any other vehicle, or vice versa use the position sensor from another vehicle on your Mazda RX8."
You might have better luck. I was asking about parts interchange. Perhaps if you phrase it differently you might get a better answer? The lady who answered was very helpful. 847-781-2000 is the number. Don't be fooled by the robot that answers, if you wait long enough it'll either go to a general delivery voicemail or the operator. |
Killer, should be all set then. I'll be installing in about 2 hours when I get off work.
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It's like talking to a wall. Resistances? Voltages?
It's just a switch!! It is highly unlikely that it is defective, unless it is physically smashed. Who has test data that to show otherwise? |
Switches, any switch, can and do go bad. Sometimes they get melted in some FI applications due to the exhaust manifold routing. Or any number of other reasons like maybe just doing something stupid like misplacing it, etc.. I don't question their ability to determine if a simple switch is bad or not or how it happened. I'm just trying to find an easy replacement for the people who say they need one.
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