Author Topic: AAN: transmission vibration, or misfire?  (Read 5676 times)

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Offline zeitgeist

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Re: AAN: transmission vibration, or misfire?
« Reply #15 on: August 27, 2012, 03:35:11 pm »
Good call, depends where it is I guess. I was sorta basing that statement on the fact that the misfire is larger when hot. Mind you, this could be fuelling-related.
UrS6 6 speed

Offline user2154

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Re: AAN: transmission vibration, or misfire?
« Reply #16 on: August 30, 2012, 06:03:08 pm »
tbh, a misfire is pretty obvious when it happens. If you can't diagnose it (misfire vs "vibration"), then you should take it to a mechanic, they will be able to tell you pretty quickly if it is a misfire or not.

I had a misfire (while driving) after fooling around with some stuff under the hood, can't remember what it was exactly but it may have been maf cleaning...

to cut a long story short.. After a lot of trouble-shooting, I started the car, unplugged the idle control valve while the car was running, and plugged it back in.

The misfire disappeared. I suspect a loose connection to the idle control valve was my problem..
« Last Edit: August 30, 2012, 06:07:00 pm by user2154 »

Offline zeitgeist

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Re: AAN: transmission vibration, or misfire?
« Reply #17 on: September 20, 2012, 12:04:44 pm »
Mmm yeah not too keen to take it to mechanics really as it so far does what I bout it for, gets me from a to b until I get a decent car, and the bill would likely eat well into the actual value of the car.

You are right re: misfire, it did get a misfire the other day on one cylinder and it was very very obvious. So no misfire.

Im leaning towards driveshaft centre support bearing and univeersal and or the driveshaft CV's. s**t. If I had a hoist I'd get the exhaust off and have a look myself, just no time to f**k around under a car on axle stands these days. I may when I have time book it into a local mechanic to remove the exhaust etc for inspection.

Does anyone have driveshaft advice if it is this? I am aware that it is well documented online, but all refer to dead links of rebuild kits, etc etc. anything NZ appropriate?

Cheers
UrS6 6 speed

Offline 00quattro00

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Re: AAN: transmission vibration, or misfire?
« Reply #18 on: September 24, 2012, 08:56:50 pm »
Have the rims and tyres been replaced?
Land Rover Discovery 300tdi
Land Rover 110 4bd1t

Offline zeitgeist

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Re: AAN: transmission vibration, or misfire?
« Reply #19 on: September 24, 2012, 08:59:42 pm »
edit: Just saw the post above get posted as I was typing. this is not a reply, although it does contain the answer to above question.

Booked in for driveshaft bearing/joint inspection this wednesday when it gets a new warrant.

FYI (as I may be selling this soon to aid purchase of a smaller car)

-There is no misfire, I traced the marginal lumpyness to moisture at the connection where the coil to spark plug connector meets the coil.
-there is no transmission problem, as checked by specialist.
-2004 model alloys fitted as replacement to those stated earlier as buckled

On the plus side, I've done a bunch of Ruapehu trips recently and she does 30- 31 MPG every time!! Very impressed.

Buy it with a new warrant if anyone likes, $3000ish. It is a 1994 S4 Avant in very dark purply blue.
« Last Edit: September 24, 2012, 09:01:52 pm by zeitgeist »
UrS6 6 speed

Offline zeitgeist

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Re: AAN: transmission vibration, or misfire?
« Reply #20 on: September 28, 2012, 11:31:13 am »
Confirmed driveshaft. Combination of C.V's, UJ, hanger bearing.  I probably wont fix it, may just run it to the ground until I can afford a nicer car, as it still gets me from A to B :D

Failing of course someone happening to have a good driveshaft miraculously lying around?
« Last Edit: September 28, 2012, 11:34:32 am by zeitgeist »
UrS6 6 speed

Offline user2154

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Re: AAN: transmission vibration, or misfire?
« Reply #21 on: October 03, 2012, 05:48:32 pm »
http://s-cars.org/site/archives/615

might just be the CV needs repacking with grease, like in the link above. Shouldn't be a hard job for a competent mechanic.

If the bearing is really gone then these guys have a solution.

http://www.034motorsport.com/chassis-components-audi-5000100200-driveshaft-support-large-chassis-urs4-5000100200-quattro-p-579.html

Offline zeitgeist

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Re: AAN: transmission vibration, or misfire?
« Reply #22 on: October 03, 2012, 09:59:47 pm »
Hey thanks for finding me that, interesting. The mechanic did state in the end that there was play felt in all but the UJ which was hard to assess.
UrS6 6 speed