engine causes van to shake while in idle

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Apr 9, 2004 | 06:02 AM

jasonspruill

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engine causes van to shake while in idle

when in idle it feels like it shakes somewhat and i was wondering if maybe the idle is set too low and the engine is chugging to stay running causing the shakes or could it be caused by something else?

Apr 9, 2004 | 09:47 AM

Beast12

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From: Sarnia, Ontario, CANADA!

Check for vacuum lines that have come off or are cracked or split. Good luck.

-Matt

May 20, 2004 | 08:58 PM

teg3

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Joined: Mar 2004

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From: colorado

I had this problem also.Was bad gas or water in gas.I run a tank of high grade once a month or every few months and put a can of dry gas cleared the problem right up.
hope this helps

May 23, 2004 | 03:13 PM

dllt

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Try and find all those vaccum lines! One could of cracked or even fallen off.

May 23, 2004 | 06:21 PM

jkorreck

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I've got a 94 with this same problem (fiancee's mother's van) I can't find a vacuum leak and with a vacuum gage attached it reads at 16 in/hg but every few seconds falls down to ten I think I have a dead cylinder but I haven't a had a chance to pull the plugs and check compression. All the plugs wires cap and rotor are about 6 months old. This seem right for dead cylinder to you?

May 23, 2004 | 06:53 PM

dllt

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I don't know about a dead cylinder. But I had to finally take my 94 AWD to a dealer to find all th vacuum leaks and then when he "fixed " it, none of the dash controls ie air conditioner , vent or heater worked! I had to return it for them to fix that problem. They said the vacuum line to them must of been knocked off when they were looking for the other leaks. So good luck finding them!

Oct 31, 2004 | 07:48 PM

Machman

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Joined: Sep 2003

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From: Wildwood

my 91 also has a slight shake at idle. Vacuum sits at 16" so yours sounds about right. The drop to 10" is a sign of something funky. Maybe a valve,rocker,lifter,lobe. I need to do a compression test also but do not have a long enough tester hose. When I do ,I will post.