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Old 02-21-2016, 12:15 AM   #1
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Default Help!! rev car and lose vacuum and car shuts off

So I just turbo charged my 1993 miata and I'm having a problem with losing vacuum. It starts and idles great but when I rev it it looses vacuum and shuts off. I already plumbed in the idle air control valve into my intercooler piping. Could it be from an intercooler leak or what other vacuum could it be coming from. Than you!!
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Old 02-21-2016, 11:01 AM   #2
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Could you post some info about your build? If you're running megasquirt, post an MSQ and datalog
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Old 02-21-2016, 11:37 AM   #3
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Could you post some info about your build? If you're running megasquirt, post an MSQ and datalog
I am running stock ECU and could the problem be that I did not put the air flow meter box thing back on?
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Old 02-21-2016, 11:45 AM   #4
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I am running stock ECU and could the problem be that I did not put the air flow meter box thing back on?
Yep.

And turbos don't work with our stock ecu properly. Are you familiar with a device called an o2 clamp?

And you can't use a BOV with the stock ECU ever.

Get a megasquirt and solve all of your problems.
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Old 02-21-2016, 12:20 PM   #5
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so you installed a turbo, and kept stock ECU with no added fuel, and no fuel/engine management? and did not install the MAF?

how do you expect the car to run with no MAF?

once you install MAF, the car will run, and as soon as you go into boost, the car will go BOOM.
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Old 02-21-2016, 12:22 PM   #6
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Originally Posted by borka View Post
so you installed a turbo, and kept stock ECU with no added fuel, and no fuel/engine management? and did not install the MAF?

how do you expect the car to run with no MAF?

once you install MAF, the car will run, and as soon as you go into boost, the car will go BOOM.
this


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Old 02-21-2016, 02:19 PM   #7
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This sounds like a direct result from those "how to turbo for cheap" you tube videos.
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Old 02-22-2016, 01:25 PM   #8
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This sounds like a direct result from those "how to turbo for cheap" you tube videos.
Yep.

I wish he would post an instructional video of how to make sweet love to a meat grinder.
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Old 02-22-2016, 01:31 PM   #9
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Originally Posted by sixshooter View Post
Yep.

And turbos don't work with our stock ecu properly. Are you familiar with a device called an o2 clamp?

And you can't use a BOV with the stock ECU ever.

Get a megasquirt and solve all of your problems.
I wish I could figure out why my friend's car can worth with the stock ECU, MSD, Voodoo, AFM and a blow off valve that dumps to atmosphere. The previous owner built it and got it running. No boom yet, but we are dumping all that for a stand alone this spring.
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Old 02-23-2016, 01:50 PM   #10
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A VTA BOV with an AFM usually means it stalls out whenever the BOV opens. Maybe he's got the spring in it screwed down really tight and it stays closed mostly. It would be the exception and not the rule.
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Old 02-23-2016, 01:54 PM   #11
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Originally Posted by sixshooter View Post
A VTA BOV with an AFM usually means it stalls out whenever the BOV opens. Maybe he's got the spring in it screwed down really tight and it stays closed mostly. It would be the exception and not the rule.
Strange. It opens just about every time he lets off the throttle (fairly sure it is an ebay HKS knockoff). We will just leave it alone until we swap the ecu and get it running speed dencity.
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