[DML] Source of My misfire and other problems

[Phil Priestley <phil@xxxxxxxxxxxxxxxxxx>]

After having my car in the shop to have the coolant eaten heads 
repaired I had a heck of a misfire at idle which I think was always 
there to some extent but  having the top end of the engine tightened up 
made it more pronounced.

I had put a new set of Bosch plug wires on about a year ago but decided 
to give it a go and replace them. As I pulled them off the car I used 
my trusty DMM to test the resistance  of them and found out they were 
all over the place varying from about 3.5 ohm to 18 ohm with with one 
of them being open. (On cylinder #4, the plug wire would not come loose 
without a lot of tugging when I tried to remove it so it's possible 
that I stretched and broke it in the process). I tested the resistance 
of the original coil wire and found out it was around 38 ohm. Replaced 
the coil with a new Bosch blue ( funny, thats the same coil that was 
used in my old air cooled Volkswagen) and fired it up and no more 
missing.

Started to check the air fuel mixture with my dwell meter and notice 
that the frequency valve was only working some of the time. It would 
hang around 21 degrees on the dwell meter no matter where I adjusted 
the mixture to.  I decided to jump the plug and see if the FV had 
crapped out on me and when i unplugged the connector i noticed that it 
was real warm and the relay smell kinda cooked. The plug for the 
fuel/rpm relay was a little brown in spots where it had overheated. So 
now I think I have tracked down the loss of power on acceleration. Got 
a new relay and will put it in tonight and hopefully I will have a 
happy, smooth idling car now. Tested the FV just for good measure and 
it seems to run ok.

I have one question for the group.  If I pull a vacuum on the charcoal 
canister where the vacuum hose from the air intake hooks up should it 
hold the vacuum? From what  I understand the when vacuum is applied to 
that port it should cause the diaphragm to move and allow the built up 
vapors to be pulled into the engine. I'm just not sure if the vacuum is 
supposed to leak off or if it should be more like the vacuum advance 
and hold whatever vacuum it has.

Phil Priestley
Vin 2105
IN FLUX

http://alessandros120.com/
(503)370-9951
1(866)225-7985


[Non-text portions of this message have been removed]






To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/