Tom Faust
03-20-2005, 03:08 PM
A month or two ago, I was followed home by a '91 20V. It has been hanging out under my barn while I replaced the rear diff bushing and some fuel lines. I don't have a Bentley yet (I prefer Haynes because the index is more complete), but I have a few problems
Whistling noise
There is a noise under the hood which I can only describe as a whistle. I can't seem to locate it. I notice the alternator belt is loose, but I have never heard a belt whistle.
Slow return to idle
If I run it up to 3000, it very slowly returns to about 2000 where it will hang for about a minute. Then it will suddenly drop to 1400 and then slowly drop to about 1000.
Diesels
When I shut it off today it ran on at about 600 rpm. It quit when I stepped on the gas (just like the carburetor days) I had 89 octane with a heavy dose of Techron in it.
Does the 20V have the dreaded "ISV"?
I notice that if I pop the oil fill, there is no difference in idle. Vacuum leak?
Whistling noise
There is a noise under the hood which I can only describe as a whistle. I can't seem to locate it. I notice the alternator belt is loose, but I have never heard a belt whistle.
Slow return to idle
If I run it up to 3000, it very slowly returns to about 2000 where it will hang for about a minute. Then it will suddenly drop to 1400 and then slowly drop to about 1000.
Diesels
When I shut it off today it ran on at about 600 rpm. It quit when I stepped on the gas (just like the carburetor days) I had 89 octane with a heavy dose of Techron in it.
Does the 20V have the dreaded "ISV"?
I notice that if I pop the oil fill, there is no difference in idle. Vacuum leak?