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Old Jul 28, 2017 | 10:56 PM
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Default Check Engine Light
Well.... Got my first check engine light within 125 miles of owning the car.

It did just roll over 30k miles. Does a check engine light come on to remind you to do the 30k mile service?

Thanks,
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Old Jul 29, 2017 | 12:09 AM
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No it means you have a fault. You need to have it read
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Old Jul 29, 2017 | 12:12 AM
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lol, How we would all wish that!
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Old Jul 29, 2017 | 05:00 PM
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Got the code read... This is what came up. What does this mean?

2 codes, p0491 and p0492 - Secondary air injection bank 1 and bank 2.
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Old Jul 29, 2017 | 05:20 PM
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I did some searching and realize this could be a vacuum leak. I did hear some people talking about adding octane booster and things like that the code not coming back.

This car came from sea level and had a 3/4 tank of 93 in it when I got it, I used all of that up and filled the car up with 91 (highest we get up here).

Could that be part of the problem?
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Old Jul 29, 2017 | 05:57 PM
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P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow
P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow

Possible cause of fault
- Electrical fault in power supply or line between relay and secondary air injection pump
- Secondary air injection pump relay mechanically faulty
- Mechanical fault in electrical secondary air valve
- Pneumatic secondary air valve faulty/sluggish
- Electrical fault in secondary air injection pump
- Mechanical fault in secondary air injection pump or secondary air injection pump blocked
- Vacuum system leaking
- Air hose to secondary air injection pump slipped off or constricted

Good chance it's a cracked vacuum line.
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Old Jul 29, 2017 | 06:05 PM
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Yea, I found that too. Now the fun of sorting out what it actually is...

Could it have anything to do with changing altitude and octane?

Thanks,
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Old Jul 29, 2017 | 06:07 PM
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I don't think so. Does your car have a tune?
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Old Jul 29, 2017 | 06:09 PM
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As far as I know, no. However, I have no way to truly check. It does have new plugs from the previous owner.

It's an X50 car and the highest boost I've seen on the highway is 1.0 for a second - normally sticks right at 0.9.
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Old Jul 29, 2017 | 06:17 PM
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The plugs in the car now are NGK PFR7B
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Old Jul 29, 2017 | 08:53 PM
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It sounds like a stock tune. My stock X50 ranges from .9 bar to 1.1 bar.
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Old Jul 29, 2017 | 08:56 PM
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Odds are the culprit is a cracked or disconnected vacuum line. You probably need to do a smoke test first to eliminate that fault. That's what I would do first.
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Old Jul 29, 2017 | 10:27 PM
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Originally Posted by mffarrell
It sounds like a stock tune. My stock X50 ranges from .9 bar to 1.1 bar.
A sustained 1.1 bar?
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Old Jul 29, 2017 | 10:53 PM
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Looks like your divertor valves failing. They are located on top by the oil filter.

https://www.vividracing.com/catalog/...?cID=10&pID=68



Last edited by Kevinmacd; Jul 29, 2017 at 11:37 PM.
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Old Jul 29, 2017 | 11:01 PM
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that would suck!
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