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Old 08-21-2013, 08:22 AM   #1
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Default Help...boosted on highway, then car acts like major vac leak!

First time post in I don't know how many years. Still have the car, but haven't been driving much. Have a bunch of kids now, but I still have the toy.

I was on the highway this morning and gave her the beans on the on ramp, then noticed my wideband showing rich and my vac at 0-1psi during cruise shortly after the boost! Pulled over at the next exit ramp hoping that it was a typical hose blow off....nothing, couldn't find any leak. Engine would just die if get off the throttle, so I didn't have a chance to hear anything under the hood. Checked intercooler hoses and VTA blow off valve and didn't see any problems there. Managed to run huge rich at cruise, while bov was fluttering and limped it home (i was smoking pretty good out the tailpipe too). No check engine light apparent, but haven't got the car on jack stands yet. I'll maybe record a video later on today.
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Old 08-21-2013, 08:43 AM   #2
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sounds like you lost your vacuum hose to the boost gauge, not a intercooler pipe.
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Old 08-21-2013, 08:51 AM   #3
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Boost guage is still moving....actually went into boost while I was cruising. BOV is venting (fluttering) under mild accelerating. At idle, the car dies.
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Old 08-21-2013, 06:21 PM   #4
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I think I found the problem. AFM door is stuck open..... a good excuse to upgrade my emanage blue to a MS?
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Old 08-21-2013, 06:31 PM   #5
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Quote:
Originally Posted by MiataNuTca View Post
I think I found the problem. AFM door is stuck open..... a good excuse to upgrade my emanage blue to a MS?
absolutely
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Old 08-21-2013, 07:28 PM   #6
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I know I should use the search function, but I've been out of the game so long. Is the MSPNP the way to go? I think anything would be an improvement over the AFM, Emanage blue, vortech fpr, hp fuel pump setup. Will my CEL stay on if I went to MS?
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Old 08-21-2013, 07:35 PM   #7
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Yes.

MSPnP2 is very good for a new tuner.

Dann
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Old 08-21-2013, 08:56 PM   #8
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How long can you deal with your aids? For the price of an MSPNP2 you can get a Reverant or Braineack built MS3. If you need something asap though the MSPNP2 will do.
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Old 08-21-2013, 09:05 PM   #9
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Do you need to pass smog with an OBDII check?
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Old 08-21-2013, 09:08 PM   #10
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The msPnP2 has the distinct advantage of knowing it will work 100% of the time first time, and it has wiring thats the same as every other msPnP2 so its easy to troubleshoot or modify it.

Dann
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Old 08-22-2013, 07:41 AM   #11
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Do you need to pass smog with an OBDII check?
It will fail emissions if my CEL is on. There is no OBDII test, only a curbside test. If the CEL is on, they will tell you it will fail.
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Old 08-22-2013, 08:06 AM   #12
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then you're good.
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