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Old 11-28-2003, 09:35 PM   #1
ttboy19
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Question HeLp

I was driving on the parkway the other night. After passing through the toll, I gunned it in 2nd gear. Then I heard some sort of a knock in the fender, as if the air filter popped off. As I drove further, I noticed that the intake wasn't making the usual "growling" noise it does around 3500-6k. So I got off the parkway and into a parking lot. I checked if the filter was still attached. It seemed fine, everything was in tact. It might've been a little crooked, but nothing major. I didn't feel any gaps or leaks by the filter.
What happened? Could there be a leak in my piping of my exhaust(borla catback), or something wrong with the intake(injen cai)? I hope it's not water in the engine.
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Old 11-28-2003, 11:45 PM   #2
Paul Sakai
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How loose is the intake? It may have swayed when you gunned it and hit the fenderwall.
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Old 11-29-2003, 12:33 AM   #3
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You woulda known if you got serious amounts of water or a brick or something else in the engine. You're probably just overreacting.


Full_Clip finds the Honduh hydrolock threads.
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Old 11-29-2003, 02:17 AM   #4
ttboy19
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hopefully the weather will clear up tomorrow. I'll check out the intake. but I think it's what you said. it probably hit the fenderwall when I gunned it. but I'm still not sure why it sounds different. tomorrow I'll check it all out and post if I found anything wrong. thanks for the tip.
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Old 11-29-2003, 01:02 PM   #5
ttboy19
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Lightbulb

Okay, so I checked every hose and tube on the CAI. Everything is okay. I checked the catback for any leaks. There seems to be a leak where the catback connects to the stock cats. I only feel exhaust coming out from the underbody side of the pipe. The side of the pipe facing the ground, I feel no leak. Could this be the problem? I have a feeling it's not the problem.
Took it for a test drive, and I only hear a real growl from the intake around 4200rpm. Before I heard a noticeable growl around 3500.

I also just realized I'm due for an oil change about 500 miles ago too.
Any advice?

Last edited by ttboy19; 11-29-2003 at 01:56 PM.
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Old 11-29-2003, 01:46 PM   #6
ttboy19
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Lately I've been putting mobil 93 octane in my car. Is that bad?

I just found this on the web:

Knock is evident by a high-pitched "pinging" noise, hence the common name "ping". Knocking can also be called "pinking".
Knock occurs near the end of the combustion process. It is the sound made when a small portion of the petrol/air mixture reaches a critical temperature and pressure, causing it to explode or detonate rather than burn smoothly.
Experience shows us that pinging in standard road engines does not cause any damage. Knock occurs when the octane requirement of the engine is greater than the octane rating of the petrol it is using.
The octane rating of petrol is a measure of its ability to resist knock in an engine.

Should I just use regular or premium? What's up with my car?
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Old 11-29-2003, 02:00 PM   #7
ttboy19
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Dammit!
I just checked the oil, and it's really low.
That's probably the reason. Maybe I should go for that oil change.
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Old 11-29-2003, 02:14 PM   #8
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haha lot of talking to yourself in this thread ttboy19

use 87 octane unless your getting pinging...and im guessing you arent; 93 is just gonna sap power, and decrease fuel efficiency
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Old 11-29-2003, 04:10 PM   #9
ttboy19
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yeah I guess I am talking to myself

Well the oil change solved my problem. The oil was brown as...you know what. Note to anyone who drives hard a lot: Get your oil changed on time.
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Old 11-29-2003, 09:17 PM   #10
Tim Sanderson
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I'm beginning to believe that the n/a subarus can benefit from an oil catch can as much as a turbo'd car. I think I'll install one soon and start to catch that oil instead of burn it.
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Old 11-29-2003, 11:51 PM   #11
ttboy19
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Catch cans can be used in n/a suby's too? I thought catch cans were for turbocharged cars only.
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Old 11-30-2003, 12:11 AM   #12
Tim Sanderson
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Quote:
Originally posted by ttboy19
Catch cans can be used in n/a suby's too? I thought catch cans were for turbocharged cars only.
Well, when you look at what the pcv valve does, it only makes sense that oil vapor/liquid can be evacuated from the heads or crankcase in either a n/a or turbo'd engine. It does not mean that you are getting excessive blowby. The vacuum created in the intake manifold will draw gas from the crankcase in either case. You may think that a turbo'd car does'nt make vacuum but it does when it's not under boost. So, yes, you can use a catch can on a n/a engine. In fact it will yield the same result which is hopefully no oil/vapor getting into the intake charge.
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