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Author Topic: Egr vacum source  (Read 1545 times)

Offline Marx3

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Egr vacum source
« on: February 13, 2016, 02:43:35 AM »
Regarding the vacum source in the baseplate, sitting in the front passenger side corner:
I remember talk about this source being strictly for the EGR valve.
What is that all about? I thought it was a regular ported source?
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Offline Cliff Ruggles

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Re: Egr vacum source
« Reply #1 on: February 13, 2016, 05:48:36 AM »
Most will have a either a "bleed off" slot or higher source location if it's designed for EGR.  A quick test with a vacuum gauge will determine this....Cliff
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Offline Marx3

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Re: Egr vacum source
« Reply #2 on: February 13, 2016, 11:07:46 PM »
So the vacum signal can be a bit special and therefore unsuited for anything else than EGR, for instance the vacum advance?
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Offline Cliff Ruggles

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Re: Egr vacum source
« Reply #3 on: February 14, 2016, 04:18:57 AM »
Correct, vacuum for EGR will show a lower reading than the source intended to operate the distributor vacuum advance.

With the baseplates that use a "bleed off" slot, you can block the slot and it will function fine for the distributor.  For the high source location baseplates they will not work effectively for distributor vacuum.....Cliff
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Offline Marx3

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Re: Egr vacum source
« Reply #4 on: February 14, 2016, 05:30:35 AM »
Allright, thanks for clear that up.
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