Miatapower List Archive

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Mail From: Lee Thompson <(email redacted)>

Hi,

This is probably the first in a series of new FM II owner silly questions,
I tried the archives but am not having success for some of the things I
wonder about. The car is a 95, 32k miles, perfect condition before
install.

I finished the install last night, including dual EGT and A/F gauge, car
started right up, very pleased.

When first turning the key on there is a loud buzz from some component in
the engine compartment, I was alone and it was late, so I didn't do
anything to hunt for what is doing this. Is this typical?

I got as far in the tuning as getting a more or less steady idle, and
setting the timing. I noticed that at idle, about 18-20 in. vacuum, the
blow off valve is held open, is that normal? I took the filter off and the
valve is open about a 1/4", without the vacuum source it closes just fine.
I tried vacuum right off the intake manifold, and off the vacuum port added
to the brake vacuum line, same thing happens.

It was too late to start driving and tuning, I would rather be doing the
first drive in the daylight, but I noticed in zone f105 the O2 reading is
way low and bouncing around a lot, like 30-50 with occasional spikes
higher. Blipping the throttle causes it to shoot higher. I assume
thinking about this is useless before doing even the ZONEF tuning, right?

Thanks, it's nice to have a resource to tap for questions like this!

Lee Thompson

This read-only message was archived from a public mail list.
Mail From: "Robert Mangas" <(email redacted)>




>From: Lee Thompson <(email redacted)>
>
>When first turning the key on there is a loud buzz from some component in
>the engine compartment, I was alone and it was late, so I didn't do
>anything to hunt for what is doing this. Is this typical?

For my car at least, yes. I get that about 30% of the time. Think
someone once said it was the IAC valve?


>
>I got as far in the tuning as getting a more or less steady idle, and
>setting the timing. I noticed that at idle, about 18-20 in. vacuum, the
>blow off valve is held open, is that normal?

Again, on my car, yes. The BBB flows enough at idle that the flow at my
BOV filter is out. (I'm absurdly pleased by this for some reason :) )


>It was too late to start driving and tuning, I would rather be doing the
>first drive in the daylight, but I noticed in zone f105 the O2 reading is
>way low and bouncing around a lot, like 30-50 with occasional spikes
>higher. Blipping the throttle causes it to shoot higher. I assume
>thinking about this is useless before doing even the ZONEF tuning, right?

IIRC, you'll need to revisit your idle zones after doing the coarse
tuning so I'd not worry about it unless you see the same behavior
thereafter.

Robert

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This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>

Lee,
Buzz is ISC (idle valve) and is normal. Bypass valve will be open at high
vacuum (cruise, over-run, idle), also normal. Following the directions, you
will need to manually tune the idle zones. A suggestion is to actually drive
the car, not sit in your driveway heat soaking for 1/2 an hour. Don't forget
to set the base timing before you go driving.

Bill Cardell (TurboDog's Dad)
(email redacted)
Flyin' Miata
1-800-359-6957 (sales only)
970-242-3800 (tech support)
flyinmiata.com

-----Original Message-----
From: Lee Thompson [mailto:(email redacted)]
Sent: Tuesday, June 04, 2002 8:18 AM
To: (email redacted)
Subject: Newb questions


Hi,

This is probably the first in a series of new FM II owner silly questions,
I tried the archives but am not having success for some of the things I
wonder about. The car is a 95, 32k miles, perfect condition before
install.

I finished the install last night, including dual EGT and A/F gauge, car
started right up, very pleased.

When first turning the key on there is a loud buzz from some component in
the engine compartment, I was alone and it was late, so I didn't do
anything to hunt for what is doing this. Is this typical?

I got as far in the tuning as getting a more or less steady idle, and
setting the timing. I noticed that at idle, about 18-20 in. vacuum, the
blow off valve is held open, is that normal? I took the filter off and the
valve is open about a 1/4", without the vacuum source it closes just fine.
I tried vacuum right off the intake manifold, and off the vacuum port added
to the brake vacuum line, same thing happens.

It was too late to start driving and tuning, I would rather be doing the
first drive in the daylight, but I noticed in zone f105 the O2 reading is
way low and bouncing around a lot, like 30-50 with occasional spikes
higher. Blipping the throttle causes it to shoot higher. I assume
thinking about this is useless before doing even the ZONEF tuning, right?

Thanks, it's nice to have a resource to tap for questions like this!

Lee Thompson