The oil looked like a mix between oil and coolant. You may have a coolant leak somewhere. My wife’s Porsche made the same foamy oil and a coolant leak was the issue. Drain the oil and see if there is water/coolant in the pan.
My engine oil is clean. Sent off a sample to blackstone before too and it was good. Been paranoid since the overheat but it seems like everything held. Coolant is coolant, oil is oil, and exhaust gasses are where they should be not in the cooling system. The catch can is probably catching water vapors from not thoroughly warming up and blending with any oil that gets through.
"In a normal car this would be easy, the spark plug holes would be accessible" - Subaru would like to chat with you :) The bores look fine. That's a very strange "limiter" it is hitting. Does it break up under load at a lower speed or does it only care about RPM? If it's load-based, I'd look fuel. If just RPM, I'd be looking ignition (which feels more likely to me at this point). It's easy to think leaving the fuel cap off for a while leads to the filter being gummed up or the pump weak, but the way it just STOPS at 6k feels more ignition to me - the closest I've personally seen to that is very worn points but obviously this has no such parts to wear out. Pop off the distributor cap and check if the rotor/cap is corroded, check the gap on the pickup if you can. If you have another ignition coil that may be worth trying as well. Good diagnostic work so far, good luck!
Thanks! It is RPM based. Car drives relatively normal otherwise. Hard to tell since my powerband is up in the area where it's being goofy 😂 I do have another ignition coil I'll go there with the distributor cap in a bit. The distributor cap has screws and it's also not in a friendly spot relatively speaking... Lol are Subarus normal cars? 😆 I overheated big on a track day a few months ago and have been paranoid about headgasket for a while but doing all the checks I have done everything seems to be fine and I dodged a bullet for the time being.
I know it sounds crazy but it may be worth troubleshooting and swapping out your clutch switch. I know it makes no sense, but it's easy and has solved problems like this in the past. Also I know a local to me guy who is quite the guru on these engines, please let me know if you want to get in touch with him, he will be more than happy to chat and help out. Best of luck and cheers.
I don't think I have a vacuum leak but I didn't smoke test. If I disconnect something and let it open it does idle up differently and make a hissing noise. Theoretically it would just stay mostly the same so probably not that. Could be injector but that's another few hours of dicking around to get to it 🙃
Hmm. Very odd. Definitely seems like its being limited electronically to me. Like it's hitting a wall. Considering it doesn't change with swapping ECUs it has to be something that sends information to the ECU. I know these cars have a TPS switch it's not a potentiometer style sensor like most cars, might be worth checking that. I'd probably also check base timing, ensure the ignition coil is good, and definitely check the distributor. I don't think it's fuel or fuel pressure related, the computer doesn't see fuel pressure, although you could see if it's within spec just to be sure. I have heard of the FPR going bad on these engines in the Cappu.
@@AnythingWheeled Sweet. I have a kit, but I'm unsure of the brand belt it came with. Heard of guys running into issues with some of the aftermarket ones.
0:45 This looks wrong. It should look like oil, not like a cup of milk tea. I'd replace plugs, leads, cap and rotor first, they're basic maintenance items after all. If nothing changes, I'd have a look at the head gasket, or oil cooler, because of the aforementioned cup of tea situation.
nice
The oil looked like a mix between oil and coolant. You may have a coolant leak somewhere. My wife’s Porsche made the same foamy oil and a coolant leak was the issue. Drain the oil and see if there is water/coolant in the pan.
My engine oil is clean. Sent off a sample to blackstone before too and it was good. Been paranoid since the overheat but it seems like everything held. Coolant is coolant, oil is oil, and exhaust gasses are where they should be not in the cooling system. The catch can is probably catching water vapors from not thoroughly warming up and blending with any oil that gets through.
"In a normal car this would be easy, the spark plug holes would be accessible" - Subaru would like to chat with you :)
The bores look fine. That's a very strange "limiter" it is hitting. Does it break up under load at a lower speed or does it only care about RPM? If it's load-based, I'd look fuel. If just RPM, I'd be looking ignition (which feels more likely to me at this point).
It's easy to think leaving the fuel cap off for a while leads to the filter being gummed up or the pump weak, but the way it just STOPS at 6k feels more ignition to me - the closest I've personally seen to that is very worn points but obviously this has no such parts to wear out. Pop off the distributor cap and check if the rotor/cap is corroded, check the gap on the pickup if you can. If you have another ignition coil that may be worth trying as well.
Good diagnostic work so far, good luck!
Thanks! It is RPM based. Car drives relatively normal otherwise. Hard to tell since my powerband is up in the area where it's being goofy 😂
I do have another ignition coil I'll go there with the distributor cap in a bit. The distributor cap has screws and it's also not in a friendly spot relatively speaking... Lol are Subarus normal cars? 😆
I overheated big on a track day a few months ago and have been paranoid about headgasket for a while but doing all the checks I have done everything seems to be fine and I dodged a bullet for the time being.
I know it sounds crazy but it may be worth troubleshooting and swapping out your clutch switch. I know it makes no sense, but it's easy and has solved problems like this in the past. Also I know a local to me guy who is quite the guru on these engines, please let me know if you want to get in touch with him, he will be more than happy to chat and help out. Best of luck and cheers.
I don't believe the AZ-1/Cara has a clutch switch. It's all mechanical and just a pedal that pulls the clutch cable.
@@AnythingWheeled damn! Good luck 🤞🏾 rooting for ya!
@@KeitoraYYC thanks, I just finished working on my dump truck and kicked it back out of the garage so I have Cara space again 😆
Clogged injector? Vacuum leak?
I don't think I have a vacuum leak but I didn't smoke test. If I disconnect something and let it open it does idle up differently and make a hissing noise. Theoretically it would just stay mostly the same so probably not that. Could be injector but that's another few hours of dicking around to get to it 🙃
@@AnythingWheeled I love how accessable my 88 Carry db71t is.
Hmm. Very odd. Definitely seems like its being limited electronically to me. Like it's hitting a wall. Considering it doesn't change with swapping ECUs it has to be something that sends information to the ECU. I know these cars have a TPS switch it's not a potentiometer style sensor like most cars, might be worth checking that. I'd probably also check base timing, ensure the ignition coil is good, and definitely check the distributor. I don't think it's fuel or fuel pressure related, the computer doesn't see fuel pressure, although you could see if it's within spec just to be sure. I have heard of the FPR going bad on these engines in the Cappu.
Will check ignition stuff next, just had to do some work on my dump Carry and promptly evicted it from the lift bay back outside where it belongs lol
@@AnythingWheeled Good luck! Oh hey was meaning to ask if you had any Cappuccino/ f6a twin cam timing belts in stock.
@@RaceBred83 probably next week.
@@AnythingWheeled Sweet. I have a kit, but I'm unsure of the brand belt it came with. Heard of guys running into issues with some of the aftermarket ones.
@@RaceBred83 what brand is it? Mitsuboshi was the OEM make for the belts
1. Check Fuel Filter. 2. Check Fuel Pump. 3. Clean Injectors.
yea if the ignition isn't it that's next.
0:45 This looks wrong. It should look like oil, not like a cup of milk tea.
I'd replace plugs, leads, cap and rotor first, they're basic maintenance items after all.
If nothing changes, I'd have a look at the head gasket, or oil cooler, because of the aforementioned cup of tea situation.
My catch can contents have always looked like Cappuccinos in a few vehicles. It's like the water condensation mixed with the oil blow by.
nice