New member here. Joined just to ask this question as I myself don't actually own an RX8. I have a shop and am building an SCCA T4 car for a client. It's an '11 Series II car.
First, some background about me... I've been building and working on cars for over 25 years. I mostly specialize in Nissan and GM products. This is the second RX8 I'm building. I know quite a bit about engines in general, but am a total noob when it comes to rotaries. I'm ASE and Nissan SCOPE certified.
Second, some background about the car... It came to me from another shop. It's having an issue with dumping massive amounts of oil into the engine and the other shop couldn't figure it out. They changed the engine twice, thinking there was an internal engine problem. When I got the car, the engine was mostly removed. The car was a salvaged flood car.
First thing I did when I got the car was to drop the entire drivetrain out the bottom to do a full inspection. Other than the engine issues, I didn't find anything major wrong with the car. I installed a salvage yard engine that was sent with the car. Everything on the engine is stock, down to the OEM air filter because it's a T4 class car. When I started it, it started having the same issue, dumping very black oil out the exhaust manifold. The engine has brand new oil in it, so the oil must be getting dumped in to the rotor housings and partially burned. That's why it comes out black. Also, the brand new plugs are oil fouled.
This is a different engine than was in it when I got it. The oil metering system came with this engine, so it's not a mechanical issue with the metering system as none of the components that were in it when I got it are still there.
So, here's my question... Could a harness or PCM fault cause the metering system to be commanded to dump way too much oil or stick wide open? I'm about ready to make a bypass hose to bypass the oil metering system completely to run the engine and hopefully get all of the oil out of it. Since this is a T4 class car though, I can't leave it bypassed. There are also several low circuit voltage codes stored for several systems. I'm thinking about swapping out the PCM.
I'd really appreciate any help from the resident engine gurus here.
First, some background about me... I've been building and working on cars for over 25 years. I mostly specialize in Nissan and GM products. This is the second RX8 I'm building. I know quite a bit about engines in general, but am a total noob when it comes to rotaries. I'm ASE and Nissan SCOPE certified.
Second, some background about the car... It came to me from another shop. It's having an issue with dumping massive amounts of oil into the engine and the other shop couldn't figure it out. They changed the engine twice, thinking there was an internal engine problem. When I got the car, the engine was mostly removed. The car was a salvaged flood car.
First thing I did when I got the car was to drop the entire drivetrain out the bottom to do a full inspection. Other than the engine issues, I didn't find anything major wrong with the car. I installed a salvage yard engine that was sent with the car. Everything on the engine is stock, down to the OEM air filter because it's a T4 class car. When I started it, it started having the same issue, dumping very black oil out the exhaust manifold. The engine has brand new oil in it, so the oil must be getting dumped in to the rotor housings and partially burned. That's why it comes out black. Also, the brand new plugs are oil fouled.
This is a different engine than was in it when I got it. The oil metering system came with this engine, so it's not a mechanical issue with the metering system as none of the components that were in it when I got it are still there.
So, here's my question... Could a harness or PCM fault cause the metering system to be commanded to dump way too much oil or stick wide open? I'm about ready to make a bypass hose to bypass the oil metering system completely to run the engine and hopefully get all of the oil out of it. Since this is a T4 class car though, I can't leave it bypassed. There are also several low circuit voltage codes stored for several systems. I'm thinking about swapping out the PCM.
I'd really appreciate any help from the resident engine gurus here.
Building SCCA T4 car for client. OMP issue?
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