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 Vacuum issues?

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dmg4

dmg4

Posts : 898
Join date : 2014-08-13
Age : 65
Location : Geneva, New York

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PostSubject: Vacuum issues?   Vacuum issues? Icon_minitimeTue Sep 10, 2019 11:01 pm

The 1996 Fleetwood has developed interesting symptoms just today:

1. Momentary loss of power, bucking at highway speeds, low engine load, flat ground, mild acceleration. Seems to run OK at wide open throttle.
2. Blast of hot air irregularly from dash vents while AC is running.
3. Loss of power assist in power steering when starting after engine off for a few minutes, and then PS returns to normal.

Is this likely related to a major vacuum leak, or crapped out booster. Where should I start?


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Fix Until Broke



Posts : 32
Join date : 2019-04-05
Location : Southeast Wisconsin

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeTue Sep 10, 2019 11:05 pm

Vacuum leak shouldn't have anything to do with the steering...?
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dmg4

dmg4

Posts : 898
Join date : 2014-08-13
Age : 65
Location : Geneva, New York

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeTue Sep 10, 2019 11:09 pm

Indirect effect on PS due to staggering/stalling engine, perhaps? That particular symptom only happened once on the way home, and the engine nearly stalled out immediately after the engine started. Symptoms 1 and 2 above are consistent, and are getting worse. CEL came on a few minutes ago.
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Fix Until Broke



Posts : 32
Join date : 2019-04-05
Location : Southeast Wisconsin

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeTue Sep 10, 2019 11:27 pm

If it will sit there and idle, maybe spray something combustible (ether, carb cleaner, etc) around all the vacuum hoses and anywhere there could be a leak. If you're careful/methodical about it you can isolate even the smallest vacuum leak this way. If you just fire hose the top of the engine and it does not speed up or run differently, you don't have a vacuum leak Smile.
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Big Wagon Guy

Big Wagon Guy

Posts : 341
Join date : 2010-02-15
Location : Wasaga Beach Ontario

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeWed Sep 11, 2019 6:52 pm

Dave have you had a chance to scan the CEL codes? The drivability issues could be caused by low fuel pressure, bad or malfunctioning EGR...plugged catalytic. Easy enough to check for a vacuum leak as explained above. The blast of warm air with the AC on is not something I have ever encountered.
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silverfox103
Moderator
silverfox103

Posts : 3009
Join date : 2008-11-05
Age : 70
Location : Littleton, NH & St. Simons, GA

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeWed Sep 11, 2019 7:12 pm

My first guess would be a fuel pump issue.

Tom
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dmg4

dmg4

Posts : 898
Join date : 2014-08-13
Age : 65
Location : Geneva, New York

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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitimeWed Sep 11, 2019 8:29 pm

Car is now at the shop. Too many balls in the air for the next two weeks to work on it. Fuel pump seems to be leading in the PM and forum list of suspects.
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PostSubject: Re: Vacuum issues?   Vacuum issues? Icon_minitime

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