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Old 05-02-2003, 11:40 AM   #1
RChampion
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99 2.5RS, 04
Forester 2.5X, 03 ECS WRX

Unhappy help!!!

something is up with my car, here are the symptoms:

-check engine light
-idles at 1000
-wont let me rev past 4200
-rpms die down slowly when i let off the gas

I'm going this afternoon to see what the CEL reads... it comes on often (cause of the headers) but I want to see if its for the same reason this time.

The only thing I can think that I did was, the other day I was detailing my engine and I undid the bolt on top of the alternator (under the red cap) to clean it up. When i was putting it back on I accidentally whacked the socket wrench on another metal thing and it sparked at me.... oops. It ran fine after that but then the next afternoon (which was rainy, if that matters) it was driving kinda wierd. All of a sudden the CEL came on and all of the above symptoms happened.

My engine mods are:

Borla Headers
Cobb CAI
UD Pulley
Stromung muffler
ProECM PC3 chip - hopefully not the reason (its been in for 2 weeks now)

Any ideas?
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Old 05-02-2003, 12:16 PM   #2
Fred Zaplitny
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I'm wondering if that was the MAP sensor you whacked. It sounds like you car is in a limp mode. For the MY99, if the MAF sensor goes bad, the car will not rev past 3500. I don't know about the 2000+ MAP equipped cars though.
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Old 05-02-2003, 12:28 PM   #3
maciek
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Same syptoms I got when my speed sensor died...but the speedometer did not work either.
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Old 05-02-2003, 01:07 PM   #4
RChampion
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Default Re: help!!!

where is the MAF sensor located?

Last edited by RChampion; 05-02-2003 at 01:34 PM.
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Old 05-02-2003, 02:15 PM   #5
maciek
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I believe it's on the intake right after the filter...there is a wire harness coming out of it.
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Old 05-02-2003, 02:34 PM   #6
Fred Zaplitny
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Default Re: Re: help!!!

Quote:
Originally posted by bigbobchamp
where is the MAF sensor located?
2000 RS doesn't have one. You have a MAP sensor and I believe it's right on the intake manifold.

Somebody else with a MAP sensor can clarify this.
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Old 05-02-2003, 03:01 PM   #7
RChampion
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i was gonna take my car to the shop to see what the CEL reads... but the light started blinking and my engine is sputtering and sounds like its sparking on the inside.... any ideas?
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Old 05-02-2003, 03:14 PM   #8
Fred Zaplitny
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Yeah, could be the coil pack. that's right near the alternator. Maybe you just knocked a spark plug wire off of it. Maybe you cracked it.
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Old 05-02-2003, 09:09 PM   #9
munkis
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did you clean the engine bay with water?

you might have shorted out the coil pack if you got it really wet, also how many miles do you have.

flashing cel means ignition system misfire, where raw fuel is being dumped into the cats, wich will cause premature cat failure.

this is usually because of one ore more cylinders not getting spark.

ie bad coil, bad spark plug wires.

I dont think it has anything do with you grounding out the power wire on the alternator, unless you held it there for a while...

Jay McDade
Lincoln/Mercury/Jaguar Tech
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Old 05-02-2003, 10:31 PM   #10
RChampion
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Quote:
Originally posted by McDade
this is usually because of one ore more cylinders not getting spark.

ie bad coil, bad spark plug wires.

I dont think it has anything do with you grounding out the power wire on the alternator, unless you held it there for a while...

Jay McDade
Lincoln/Mercury/Jaguar Tech

correct! thanks alot, it ended up having nothing to do with the spark.... one of the pluge wires was bad, i realized that when it shocked me the second i put my hand on it... it was bad

i took off the wire (after shutting off the damn car) and the copper part stickin out of the coil was corroded completely... all green. The other 3 looked perfectly clean. I replaced the wire, used some super soft sanding stuff to rid of the corrosion, and put it all back together and it started running fine again.

The CEL is still on, but I figure its because there is still fuel in the cat... so will that burn up sometime and eventually make the light turn off?
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Old 05-02-2003, 10:54 PM   #11
Fred Zaplitny
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You might want to take your coil pack off and give it a quick inspection. If it has ANY cracks underneath, you need to replace it. Look for a crack at the bad (green) terminal.

My coil pack had a crack underneath at the terminal that was green.

I'm guessing you have the same problem.

You most likely have a bad coil pack.

That's about $170.00!

ouch!
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Old 05-03-2003, 03:32 PM   #12
RChampion
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the CEL turned off today but I'm still worried about the coil pack... do I have to take it off to inspect it good enough? cause i just gave it a glance and didnt see any cracks.

robert

ps- what the hell is with this guy? ---
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Old 05-03-2003, 03:40 PM   #13
Fred Zaplitny
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Take it off and check for cracks underneath. It only has 3 bolts holding it on. Also check for blue sparks under the hood when the car is running at night.
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Old 05-03-2003, 05:12 PM   #14
munkis
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very common problem with subarus.

im gonna take a wild guess and say it was cylinder no 3?

am I right?

you should replace all your wires too. You can also use a wire brush to clean the terminal, you might want to replace the plugs too.

The cel will clear after the 5th 'drive cyle' where it does not see a misfire on that cylinder. (wich it already has since your cel is off now)

but you could have also disconected the batter for a few minutes to clear it.

Jay
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Old 05-05-2003, 10:49 PM   #15
RChampion
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it was actually #1, I'm gonna get around to lookin under the coil when i get a chance. I looked at it at night time, no sparks, its runnin fine, CEL is gone, sounds like the beast she is
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