Req: 2nd opinion during BEGI-S install (INSERT HELP) - Page 5 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-06-2008, 11:05 AM   #81
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Quote:
Originally Posted by Spookyfish View Post
Nope... I shaked the turbo pretty well... nothing.
The axle from the turbine site can be pulled out very very slightly (< 1mm) but I suppose that is normal too?

I will e-mail Stephanie to get BEGI to help me with diagnostics.
That's normal.. without oil pressure.
Try with a little bit off force to have the blades touch the housings.
Should be ok...
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Old 08-06-2008, 11:09 AM   #82
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Needle valve was closed (in) so I should be rich at least?
Yep... Maybe way too rich.
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Old 08-06-2008, 12:02 PM   #83
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Yep... Maybe way too rich.
Maybe, but it ran well, until last night.
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Old 08-06-2008, 12:14 PM   #84
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If that noise is from the turbo, something is wrong.... hell is sounds like rope pull on a flag pole.

What was your ignition timing set to? any retarding device? Go do a compression check, motor doesn't sound healthy.
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Old 08-06-2008, 12:37 PM   #85
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Timing was set to 10* BTDC.
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Old 08-06-2008, 12:39 PM   #86
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Rope pull on a flag pull is pretty accurate indeed.
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Old 08-06-2008, 01:09 PM   #87
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fwiw: my 1.6 begi s (stock wastegate is 7psi) was detonating pretty badly until i installed an MSD retard box pulling 6* with a base timing of 7*.
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Old 08-06-2008, 05:35 PM   #88
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It cannot detonate on stock 10 degrees at idle...
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Old 08-07-2008, 09:41 AM   #89
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With the turbo out of the way, and de airflow meter back on the inlet we started the car to confirm it runs (low idle) and the turbo oil input is squirting oil, so that can't have been the issue.

Now I need to decide to:
a) go back stock manifold and downpipe
b) remount the turbo
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Old 08-07-2008, 09:48 AM   #90
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check compression. check leakdown. Do that first before anything else.
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Old 08-07-2008, 11:57 AM   #91
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Did it run normally??
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Old 08-07-2008, 03:03 PM   #92
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Well, there is only so much that I can diagnose myself. Car is over to a revision and tuning shop 20min from here. Will keep BEGI in the loop.

Last thing I checked was the oil feed to the turbo and that was squirting like hell.
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Old 08-07-2008, 03:11 PM   #93
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that sucks donkey *****. I'm sorry, you must be frustrated.
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Old 08-07-2008, 03:27 PM   #94
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True, I'd rather be driving around. I'm positive to think that the car will only get better from now
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Old 08-07-2008, 04:07 PM   #95
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Quote:
Originally Posted by Spookyfish View Post
... Car is over to a revision and tuning shop 20min from here. Will keep BEGI in the loop.
Please keep us in the loop also. Collective wisdom and all that, you know....
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Old 08-09-2008, 09:30 AM   #96
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Default Spooky - what was it?!

I'm really interested in hearing the outcome on this one... what was wrong with it?
Jim
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Old 08-13-2008, 09:59 AM   #97
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Ok, diagnostics made by local company: leak down 10-20% which is OK. I don't know how they exactly test this and this may be differend to methods used here.

Cause: one of the plugs had it's gap at 0. Meaning the plug was essentially short circuited. After they fixed that, car ran smooth as ever.

They are unsure how this happened. Only a foreign object can cause this so they are going to use an endoscope to check the cylinders.

Next step is to reattach the turbo and see if it still makes the funny noise.
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Old 08-13-2008, 12:35 PM   #98
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Update: turbo is on and runs fine. Still has the high pitched ding though. Possibly a foreign object entered the air filter, through the inlet, intake and cylinder. There knocked out my spark plug and exited through the manifold to the turbine side of the compressor and is still there making noise.

Now how do I verify and how do I take it out?
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Old 08-13-2008, 03:03 PM   #99
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To eliminate the afpr: Just connect the fuel system as oem (standart mazda)
by moving the retour line bach to it's origional position. So the fuel is not running through the afpr.
Now start the car and STAY OUT OFF BOOST!!!!!

Take it for a run. If the whine is gone, the afpr is to blame.

NEVER GO INTO BOOST WITHOUT THE AFPR!
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Old 08-13-2008, 03:11 PM   #100
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Quote:
Originally Posted by Spookyfish View Post
Now how do I verify and how do I take it out?

remove the turbo from the turbine housing...


it's doubtful something is still in the housing and randomly colliding ever now and again.

a foreign object bouncing around would make a noise much like a marble in a garbage dispoasl.
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