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Check Engine Light, Shuddering and Other Nastiness


RedLine

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So as you may have guessed from the title, I'm having some fun with my car.

It's a 2001 Legacy B4 RSK BE5 Rev-D. I had an issue with engine pinging a couple of months ago, and have run a bit of octane boost since then, which seemed to fix the issues.

But, on the commute in this morning, I was in 4th and braking as the traffic slowed. As we started moving again, I popped it down to 3rd, and as I released the clutch, it just started juddering (a bit like if you are in too high a gear, but I am sure I wasn't - would have been about 50ish). It actually felt like it was going to stall, and I noticed the check engine light. I didn't notice any noises other than the "wrong gear, moron" engine protest noise.

So I shifted to 2nd I guess out of instinct, and there was just no power and the check engine light was on. The light clicked off, and power was there again, until the check engine light came back on and power was lost again...

There was nowhere to pull over due to the highway upgrade happening in Welly, so I just babied it to town. It came right for a good 10 minutes, and I actually wondered if it was just a passing issue. But when I was driving in the carpark (low speed, lots of clutch) it started playing up again.

So its now sitting parked, I'm at work and I know I have to get home :P

Does anyone have any idea what it could be? I'm thinking it may be related to the ping that was happening before, but I really don't know. Are there any common problems that would be worth checking first?

The thing that's making it even more difficult to understand is when the check engine light is on, the power is gone. I can't tell if it is the loss of power causing the check engine light, or if it is something quite minor that is clicking the check engine light on, putting it into limp mode or something... does it even have limp mode? :confused:

Any advice would be great. I'm planning to "limp" it home early today to avoid the traffic. Hopefully she makes it :)

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Check engine light on = limp mode so complete loss of power

Could be a dozen things sorry. Airflow meter is common on the earlier revisions, not so much this one, but still need to get a scanner tool on it to tell you what the problem is, whatever is wrong the car knows about it

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 Marky']Check engine light on = limp mode so complete loss of power

Could be a dozen things sorry. Airflow meter is common on the earlier revisions, not so much this one, but still need to get a scanner tool on it to tell you what the problem is

Thanks once again, Marky. I figured that would be the case, but figured I would post as a long-shot in case someone knew. Desperate times and all that :)

[quote name='Marky said:

whatever is wrong the car knows about it

I find that strangely comforting :)

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I took it in on Saturday and the mechanic said the code was for the cam position sensor... so he replaced them yesterday and its still throwing the CEL. Apparently, now it's the alternator back-feeding into the ECU or something, so now they want to replace the alternator, but they don't know if that will fix it and can't find one. I'm getting concerned that they have no idea what they are doing and are just slapping parts on, hoping to clear the fault.

Edited by RedLine
Making my post semi-coherent
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 loner said:
lols... take it to this guy. Rick Wheeler. 027 440 1641

Cheers for that - will give him a call next time I need something done on the Suby :)

The guys who have got it at the moment found an alternator, and they're sure that's what the fault is. :rolleyes:

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Issue was solved by replacing the alternator. Credit to them, the didn't charge for the sensors or the labour to do that since it didn't fix it. So it's back on the road with no CEL :D

In other news, is anyone interested in buying a 2001 Rev-D? :rolleyes:

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