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Subaru Impreza Engine Problems

239 messages,  Last post on Nov 15, 2009 at 2:47 PM

You are in the Subaru Impreza Maintenance & Repair Forum. Your Host is kcram

What is this discussion about? Subaru Impreza, Engine, Sedan, Wagon


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#196 of 239
Re: replaced furl lines,,wont start [mutty122] by ateixeira
Mar 05, 2008 (9:16 am)
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Replying to: mutty122 (Mar 05, 2008 9:10 am)

Cold air is more dense, so that makes perfect sense. Also, a turbo compresses the air, which heats it up, so you lose some of the power gains, which is why intercoolers are so common.
 
Not sure about the specific turbo, though.
#197 of 239
hi all by jimv1125
Mar 10, 2008 (10:49 am)
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anyone know what an asv solenoid is?
#199 of 239
cayalyicconverter or not by tunerguy87
May 03, 2008 (1:20 pm)
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hey i have a 06 subaru wrx and i was thinking about taking out the cayalyicconverter but i was told that it might be a bad idea but others say its all good. what should i do. p.s. i was looking for extra hp and a better sound. will that work
#200 of 239
Re: cayalyicconverter or not [tunerguy87] by paisan
May 03, 2008 (7:53 pm)
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Replying to: tunerguy87 (May 03, 2008 1:20 pm)

Well first of all it's a Federal Offense to remove the Cat. I believe it's about a $10,000 fine or something.
 
As for HP and Sound, you can go for a high-flow cat and a cat back exhaust which will increase HP and Sound.
 
-mike
#201 of 239
Fuel question by kabuji
Sep 15, 2008 (8:07 pm)
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Gooday all, I have a 2002 WRX that I'm in love with, ha ha. Only thing is, I'm havin some interesting fuel problems (I'm pretty sure anyway) and was wondering if any of you could help. My original problem was that it had trouble starting, I would have to crank it for a few seconds before it caught and started. The check engine light would come on and off, and eventually stayed on. I brought it into the dealership, they did a compression test and found that the #3 cylinder is firing low. They replaced the fuel pump, spark plugs, fuel lines and it seemed to work alright after this. (Luckily it was under an extended warranty, so the cost wasn't too bad!) Anyway, that seemed to fix most of the problem, but now it's kind of going back to the old problems, after only about a month or two. For about the past few weeks, the check engine light came back on, and it was hard to start, and now it's off and it's acting fine. Can anybody shed any light on this or if anybody has had anything similar happen?
#202 of 239
Re: Fuel question [kabuji] by ateixeira
Sep 16, 2008 (12:10 pm)
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Replying to: kabuji (Sep 15, 2008 8:07 pm)

If it failed a compression test, nothing they fixed addresses compression problems.
 
It's most likely the head gasket or the piston ring. Something is not sealing, basically.
 
Fuel pump, spark plugs, and fuel lines have no effect whatsoever on the compression.
#203 of 239
Re: Fuel question [ateixeira] by kabuji
Sep 20, 2008 (7:16 am)
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Replying to: ateixeira (Sep 16, 2008 12:10 pm)

What about the starting problems though?
#204 of 239
Re: Fuel question [kabuji] by paisan
Sep 22, 2008 (5:54 pm)
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Replying to: kabuji (Sep 20, 2008 7:16 am)

My guess is that the compression isn't that low.
 
Instead I'd think the problem is related to the evapo/checkvalve that keeps fuel in the lines. The CEL if it's one for the emissions system will show what's up with it.
 
Try this next time you start your car, put the key into the "on" position for 5-10 seconds before starting. If it doesn't give you a problem there is a check valve in the fuel system that has failed.
 
-mike
#205 of 239
'08 Impreza engine knock? by oldladydriver
Oct 12, 2008 (7:17 am)
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I recently purchased a new '08 Impreza 2.5i 5-dr hatchback (auto transmission), and now have about 2300 miles on it. After about 1500 miles I began to notice some mild engine knock or pinging when the engine's under load (going up hills, or acceleration). More noticeable when car is warmed up, or outside temp is warm. This has persisted through several tanks of regular (87 octane) gas -- and I currently am trying 89 octane gas to see if it makes a difference (so far, no). And yesterday, the car didn't start on the first try (cranking, but didn't catch), ok 2nd try. I will be taking it to the dealer -- but want some other opinions first. I don't think the engine on a new car should be pinging. I am enjoying my Impreza, but am worried about engine problems this soon.

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