Re: [DML] Rough running
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Re: [DML] Rough running

There are a couple of easy places to tie into the intake, one of which is on 
the end of the driver's side intake runner (on the end closest to the front 
of the car. There you will find a barb used as the vacuum source that feeds 
the three-port vacuum switch under tha intake manifold. If you only wish toi 
measure the vacuum at idle you can disconnect the vacuum line that goes to 
the three port switch and hook the gauge up to the barb.

>  Be careful not to drop the end of the disconnected vacuum line as it can 
>easilt drop down between the engine and the firewall and can then be hard 
>to find again. <

If you want to be able to rev the car and still have advance work properly 
while doing so, which is what I recommend as it is important to get an 
understanding of what the vacuum is doing as the car accelerates, get a 
short length of vacuum line and a vacuum tee of the correct size, and "tee" 
the gauge in at the same location.


>From: deloreanernst@xxxxxxx
>Subject: Re: [DML] Rough running
>I would confirm this by
>hooking up a vacuum gauge. You should see at least 18" at idle and a lot of
>PRVs pull 22".>>
>Where would you place it for the test?
>vin 11174

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