1984 4k - no start

Tue Aug 4 15:15:20 PDT 2009

Well there you go :-)

I was pulling 1 sparkplug at a time while the motor was running - just
to see if there was any difference;

-- pulled #1 didn't seem to change, put #1 back

-- pulled #2 seemed to change just a bit, but not so much that I was
sure

-- put #2 back, and pulled #1 again - car dies...

Huh?

Back to no-start...

Vittorio -

________________________________

From: jlagnese at massed.net [mailto:jlagnese at massed.net] 
Sent: Tuesday, August 04, 2009 5:37 PM
To: Bares, Vittorio; L DC; quattro at audifans.com
Subject: RE: 1984 4k - no start

Hopefully it keeps running!
---- Original message ----

Date: Tue, 4 Aug 2009 17:15:20 -0400
From: "Bares, Vittorio" <Vittorio.Bares at nuance.com>
Subject: RE: 1984 4k - no start
To: "L DC" <ldc007usa at yahoo.com>, <jlagnese at massed.net>,
<quattro at audifans.com>
>Shweet ebay find! I've emailed the seller to see if he carries the dist
for the 84.
>
>I went out to the car (just finished replacing upper links, tie rod
ends and a cv boot on the A4 - its been a very tough Audi August ;)) to
diagnose some more.
>
>With a test light - I checked all 4 connections to the coil - they all
lit up just fine.
>
>Checked all the fuses just in case.
>
>Put the cap back on the distr - and thought, ah what the heck lets see
if anything has changed. She started right up - damn!
>
>The only thing I've learned is that my fuses are good, the coil lights
up the test light and the fuel pump seems to be behaving properly. I
rolled under the car while blipping the throttle, it didn't seem to
change noise.
>
>Its still not running quite right though, under light acceleration it
misses slightly (if your just cruising, maintaining a constant speed, 35
or so, although the speed seems to be irrelevant) - Under full throttle
it seems to respond well - but I'd say its slightly under power. Like it
wasn't getting full flame in the pistons or something - but its hardly
noticeable...
>
>My suspects right now remain:
>-- ignition module
>-- hall sensor/distr
>-- fuel relay
>-- coil (distant but possible contributor)
>
>Although, I worry about the old wiring in this rig - there could be a
break anywhere :\
>
>Vittorio -
>
>-----Original Message-----
>From: L DC [mailto:ldc007usa at yahoo.com] 
>Sent: Tuesday, August 04, 2009 4:28 PM
>To: jlagnese at massed.net; quattro at audifans.com; Bares, Vittorio
>Subject: Re: 1984 4k - no start
>
>
>Check the hall sender connections at the distributor. If is loose,
engine vibrations would be enough to cause intermittent failures.
>
>In one of my VW QSWs (same engine and tranny- JT code- as in 4KQ) the
plastic wheel inside the distributor broke, causing it to completely
fail--no spark. It happened at a gas station right after filling the
tank. I started the car and everything went dead 5 seconds or so later.
>
>In any event, $175 just for the hall sender is ridiculous. You could
get a whole rebuilt distributor for as low as $85 plus free shipping
from e-Bay. As with any purchase on the internet, especially automotive
parts, make sure you contact the seller to make sure they send you the
correct part. 
>
>http://tinyurl.com/l6kvo7
>
>-Regards,
>
>-Louis
>
>
>> From: Bares, Vittorio <Vittorio.Bares at nuance.com>
>> Subject: Re: 1984 4k - no start
>> To: jlagnese at massed.net, quattro at audifans.com
>> Date: Tuesday, August 4, 2009, 3:22 PM
>> Don't have a bentley for the 4k. I'm
>> in s.NH. Would love to borrow 1 if u'r close by.
>> 
>> ________________________________
>> 
>> From: jlagnese at massed.net
>> 
>> To: Bares, Vittorio; quattro at audifans.com
>> 
>> Sent: Tue Aug 04 13:18:56 2009
>> Subject: RE: 1984 4k - no start 
>> 
>> 
>> I just plugged in another. Do you have an extra? If not,
>> where are you? You could borrow one of my extras. I do have
>> a few known working units. They are the same on quite a few
>> VW/Audi. This went south on my 87 16V Scirocco. I actually
>> used one from a 91 Jetta IIRC.
>> 
>> I'm sure that the Bentley has a way to check.
>> 
>> John
>> ---- Original message ----
>> 
>> 
>>     Date: Tue, 4 Aug 2009 12:25:43 -0400
>>     From: "Bares, Vittorio" <Vittorio.Bares at nuance.com>
>>     Subject: RE: 1984 4k - no start
>>     To: <jlagnese at massed.net>,
>> <quattro at audifans.com>
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>>     
>> 
>> 
>> 
>>     How does one test that?
>> 
>> 
>>      
>> 
>> 
>>     Also, there was a suggestion to check
>> the
>>     12v at the coil - coil has 4 wires
>> (2-green on one side, 2 black on the
>>     other connector) - which ones deliver
>> 12v to the coil? (they look awfully
>>     thin)
>> 
>> 
>>      
>> 
>> 
>> 
>> 
>>     Vittorio -
>> 
>> 
>> 
>> 
>> 
>>     
>>     
>>     
>> ________________________________
>> 
>> 
>> 
>> 
>> 
>>     From:
>>     jlagnese at massed.net
>> [mailto:jlagnese at massed.net]
>> 
>>     Sent: Tuesday, August 04, 2009
>>     11:48 AM
>>     To: Bares, Vittorio;
>>     quattro at audifans.com
>>     Subject: Re: 1984 4k - no start
>> 
>> 
>> 
>>      
>> 
>> 
>>     Check the spark control unit. Its
>> piggybacked on the computer.
>>     ---- Original message ----
>> 
>> 
>>     Date: Tue, 4 Aug
>>     2009 10:42:59 -0400
>>     From: "Bares, Vittorio"
>>     <Vittorio.Bares at nuance.com>
>>     Subject: 1984 4k - no start
>>     To: <quattro at audifans.com>
>>     >So, has new wires, rotor, cap, plugs
>> - was running fine - then about a
>>     >week ago, while driving it - it just
>> stopped running.
>>     >
>>     > 
>>     >
>>     >I cleaned the contacts on the coil -
>> started again, but wasn't running
>>     >well. Almost as if it was running on
>> 4 cyl (it is a quattro 5cyl :-)). I
>>     >was trying to diagnose by pulling
>> one sparkplug at a time while it was
>>     >running, not much change when I did
>> so - consistently for all 5 plug
>>     >wires.
>>     >
>>     > 
>>     >
>>     >Pulled the plug on the temp sensor
>> in the rear of the head - no diff.
>>     >
>>     >Pulled the plug on the sensor that
>> is on the fuel distributor - no diff.
>>     >
>>     > 
>>     >
>>     >This morning - no start...
>>     >
>>     > 
>>     >
>>     >No spark.
>>     >
>>     > 
>>     >
>>     >I'm thinking hall sensor??
>>     >
>>     > 
>>     >
>>     >Vittorio -
>>     >
>>     > 
>>     >
>>    
>> >_______________________________________________
>>     >quattro mailing list
>>     >http://www.audifans.com/mailman/listinfo/quattro
>
>>     >http://www.audifans.com/kb/List_information
>
>> 
>> 
>> 
>> 
>> 
>> 
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>
>
> 