Mazda Rotary Club

General => General Technical => Topic started by: dazsir on October 03, 2007, 05:14:18 PM

Title: Humming sound? WTF???
Post by: dazsir on October 03, 2007, 05:14:18 PM
Hi started my car up after my single installation, all was going well!

The engine died, and now I cannot start it, from underneath the UIM, there is a loud humming noise, the sound of electricity.

What I have modded:

850 primaries with 3ohm resistors.
1600 secondaries with 3 ohm resistors.

Before I got all the piping made up, it ran ok, but last night, it just stopped and now it refuses to start!

There is fuel getting though as the smell is quite detectable, so my question is the following:

COuld it be a coil? would that be why the humming is there?

Are the 8bit coils the same as the later 16bit ones?  Ie I have several sets of the old coils, would they work?

Many thanks
Title: Humming sound? WTF???
Post by: memski on October 03, 2007, 05:46:59 PM
Thats the idle speed control valve under the plenum, sounds like you\'ve flooded it fella.
Title: Humming sound? WTF???
Post by: dazsir on October 03, 2007, 05:57:55 PM
But would that explain it dying on me, when it was running?

Many thanks for your response.
Title: Humming sound? WTF???
Post by: memski on October 03, 2007, 05:59:40 PM
Not sure mate, has it been setup to run the bigger primaries? Btw the buzzing noise is normal once it\'s stalled, it should go if you remove keys and try again.
Title: Humming sound? WTF???
Post by: interloper393 on October 03, 2007, 07:03:10 PM
do u have the crash test dummies under your plenum? :yes

http://youtube.com/watch?v=-4WbwwhBmRk
Title: Humming sound? WTF???
Post by: dazsir on October 03, 2007, 08:24:30 PM
No its not been set up to run the larger injector, just informed the Apexi the size of the injectors through the commander.

Will strip it at the weekend!

Any advice would be appreciated.
Title: Humming sound? WTF???
Post by: shaunwil on October 03, 2007, 10:06:44 PM
Thought 1600 could only be setup through the plug-in PC software ????

Shaun
Title: Humming sound? WTF???
Post by: Jit on October 04, 2007, 08:38:57 AM
humming might be arcing...check your leads, plugs and coils...did any of them get wet by chance? otherwise it might be a faulty coil pack?
Title: Humming sound? WTF???
Post by: nikp on October 04, 2007, 08:52:35 AM
It might just not know the words! :p (Sorry, couldn\'t resist!)
Title: Humming sound? WTF???
Post by: dazsir on October 04, 2007, 09:59:34 AM
took me three attempts to understand what you said! Nice joke!

Will check it all over at the weekend, let me know if you all have some ideas!

Thanks