 Vac Advance, Is mine bad?? |
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| Tom73 |
 May 15 2005, 05:39 PM
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#1
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Member  Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792  |
Working on the tune up and tested the vac advance. It will pull off like it should but then I hear a "pop" and it slowly goes back. Will not hold. Is it bad???
This is a '71 1.7. tom... |
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Replies(1 - 8)
| SirAndy |
May 16 2005, 12:33 AM
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#2
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Resident German Group: Admin Posts: 41,677 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
(IMG:http://www.914world.com/bbs2/html/emoticons/icon_bump.gif) don't know the answer but i just bumped this back to the top for 'ya ...
(IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) Andy |
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| McMark |
May 16 2005, 01:12 AM
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#3
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I'm not sure I understand your description. But if your unit will not hold a vacuum, it is bad. You can suck on the vacuum hose to move it and plug the hole with your tongue. If you can see the advance plate move back to its neutral position, then it is bad. Best as I can understand, you've got a bad unit.
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| Tom73 |
May 16 2005, 06:47 AM
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#4
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
Thanks for the response McMark.
Now for part 2 of the question, where can I get a replacement? AA shows them for $94 (OUCH (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) ), Pelican does not show them, and neither does MidAmerica. Any suggestions welcome. tom... |
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| Dominic |
May 16 2005, 07:09 AM
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#5
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Dominic Group: Members Posts: 992 Joined: 14-January 03 From: Vacaville, CA Member No.: 149 Region Association: Northern California |
Tom,
What is the part nuumber on your vac advance unit ( i need the bosch part # also). I may have a new one that will work. Dominic |
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| Tom73 |
May 16 2005, 07:54 AM
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#6
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
Thank you Dominic. I will check the number and post when I get home tonight. tom... |
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| Tom73 |
May 16 2005, 07:24 PM
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#7
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
I could not find any number on the vac advance. If it will help, the distributor had: JFUDRX 4 <- 0 231 174 001 022 905 205 F tom... |
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| Tom73 |
May 16 2005, 09:44 PM
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#8
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
Still looking for a source. Do not see a part number on the vac advance, but here is what it looks like:
(IMG:http://temp.corvetteforum.net/c5/73vette//914/vacadv1.jpg) (IMG:http://temp.corvetteforum.net/c5/73vette//914/vacadv3.jpg) (IMG:http://temp.corvetteforum.net/c5/73vette//914/vacadv2.jpg) tom... |
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| McMark |
May 17 2005, 12:29 AM
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#9
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
According to Brad Anders D-Jet parts table a 022 905 205 F distributor goes with a 022 905 271 A vacuum advance. I'm curious what differences are between the various vacuum advances.
Tom, look for a good used one. The Suck-And-Tongue test will tell you if you're getting a good one. IMHO, don't worry about the part numbers unless somebody pops on here and lets us know what the differences are between the various part numbers. |
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