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I have the same problem... was told it is a vacuum leak, possible around the PVC valve.

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12y ago
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Q: What would cause your buick rendezvous to sound like a siren or low hum idling or after turning car off?
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What would cause an 87 Buick Century to shutoff when idling?

old fuel filter


What would cause a Buick rendezvous to just cut off?

Being a GM product I would suspect the fuel pump is bad.


What would cause Buick Rendezvous overheating?

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Would the crank fuse cause your rendezvous not to start?

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A clogged muffler can.


Can spark plugs cause car to shake?

Yes, when idling and driving.


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What would cause your 1990 300zx idle rough?

my 1990 300zx is idling rough what could cause this?


What cause an ABS system to disable in a Buick rendezvous?

The ABS Disable light may come on for a number of reasons. I started having issues after driving on wet roads. The source of the problem with my Rendezvous was related to corrosion of connectors, primarily at the two wire bundle connections under the front wheel wells - which cost over $700 to replace/repair. Repair shop told me that it's a common problem with Rendezvous and is primarily due to a poor design. Other issues I've had with my car have all been electrical - Thanks Buick! BBaaspencer here..mine was caused by a bad hub bearing and a bad abs wiring harness.


Car shakes and loses power when idling?

If a car shakes and loses power when idling it can be the spark plug. If a spark plug is fouling, it can cause power losses.