Re: [DML] Dwell meter setting??
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Re: [DML] Dwell meter setting??

Well, since your referencing my web page I should reply. You need to 
understand what a dwell meter is measuring first. A dwell meter was made to 
measure the open and closing of ignition points inside a cars distributer 
before electronic ignitions came out. This is why you can use it on the 
DeLorean because you are measuring the opening and closing of the frequency 
valve. Reading the instructions I state "What you are actually reading is 
the duty cycle of the Frequency Valve." If you had an occiloscope you could 
watch the cycle as a square wave pattern. The duty cycle is the length of 
time the frequency valve is on. In quoting from my Bosch Fuel Injection 
book, "When the Lambda sensor detects a lean running condition the ECU 
increases the duty cycle to the frequency valve, thereby increasing the 
volume of fuel through the injectors." The fact that it says to use the 
"Four Cylinder Scale" is only a reference to a scale on the meter. It has 
NOTHING to do with four cylinder engines.

If your dwell meter has no scale for four cylinder engines than just adjust 
the CO to the maximum swing of the needle. Once its adjusted, take the car 
for a drive and observe the performance. You can adjust the dwell richer or 
leaner as required. A lean mixture makes the car hard to start when cold.

Dave Sontos
vin 02573
----- Original Message ----- 
From: "Ryan Wright" <ryanpwright@xxxxxxxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Saturday, February 04, 2006 9:27 PM
Subject: Re: [DML] Dwell meter setting??

> Dave,
> I'm following this procedure:
> I don't know why it says the use the 4 cylinder setting... My meter
> doesn't have such settings. Just a "dwell" option and no choice of
> cylinders.

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