[urq] Resolved! EFI + MAC-14 maxing ataround 5k RPM

Tue Oct 30 04:13:29 PDT 2007

Steve,

Sounds like you need to find someone else to troubleshoot and fix.  There is nothing
wrong with crimped connections – as long as they are done right with quality connectors.
Many of the ones you get from local auto stores are not good – you need the kind with
built in heat shrink over the connector not the hare plastic.

Soldering isn’t always the recommended approach as the solder can become brittle and
fail. There are arguments on both sides.  There are times to solder and times you crimp.
I crimp about 90% of the time and my success rated with crimping far exceeds soldered
connections.

It should not be that hard to troubleshoot the ignition and coil feed.  It would be good
to find someone who knows the Audi I5 turbo ignition – I assume that is what is being
used.

If you are still using MAC-02, I have some harnesses and ECUs.  The wiring is not that
bad of a deal.  The air intake and AC evaporator coil needs to be moved out of the way
if the harness is being replaced which is a PITA, but if only a few wires then you can
work around it.  I could do a complete harness swap in-situ on the car in 8 hours, so
$6k for the job is total BS.  A good trouble-shooter should be able to ID the problem in
a few hours.  There is a methodology and one should be armed with the wiring diagram and
service tech manuals for the car.  I may have some digitized and they are on the web
somewhere if you don’t have copies.

Ben

  _____  

From: Stephen Redford [mailto:shr42 at msn.com] 
Sent: Tuesday, October 30, 2007 7:46 AM
To: Ben Swann
Cc: URQ
Subject: Re: [urq] Resolved! EFI + MAC-14 maxing ataround 5k RPM

--------------  Congrats  on solving the problem s !!!   It must feel good to get over
that hurdle,,   I now have to go to a third shop to try to get my megasquirt to work.
The second shop  can't get the coil to fire - they say no signal from the ecu...which is
brand new the latest circuit board, etc.  They want to charge me $6K just to "rewire the
engine" harness etc. which the first shop made a mess of (wires everywhere and lots of
crimps instead of solder, etc.)... All that rewiring and they want to sell me another
brand of ECU also.   The second shop had good intensions but just doesn't get it with
megasquirt I guess...  I am happpy for you and  wish you more progress.   I am taking
bets now , as to how much longer it will take to get my car running...  Except for a
month or so, it has been in someones shop for about a yr. and a half.    Take care,
...Stephen '85Urq mx with mc-1 head (but not installed with the "fix" which it was
supposed to have been, and a not working megasquirt installation...

----- Original Message ----- 

From: Ben Swann <mailto:benswann at verizon.net>  

To: a.sigal at bluewin.ch 

Cc: urq at audifans.com ; quattro at audifans.com 

Sent: Sunday, October 28, 2007 2:45 PM

Subject: Re: [urq] Resolved! EFI + MAC-14 maxing ataround 5k RPM

I don't know what to say about the plug and compression test - I knew I had some rich
spots and under normal driving however the carbon would burn off as things are lean on
cruise.  I did have some obvious things to address and some things I thought were off,
leading a bit astray on diagnosis.  Also, it takes awhile to do certain things - it took
me about a week to get the fuel pump issue straight and one does not always work on the
same problem at a straight shot, in fact I was sidetracked for a few weeks while dealing
with the car from Canada.  So yes, I probably should have checked them earlier, but it
is always things are somewhat obvious after the fact.

The engine still needs tuning, but I'm very pleased right now at how it is operating - a
little surging on cruise=too lean and probably still too rich under high load and RPM.
These I'll work out.

Megasquirt has a lot of parameters to deal with, and right now even with being set for
the wrong injector, other factors compensate making it run right.  I just need to get
over the learning curve on it.

Ben

-----Original Message-----
From: Ado Sigal [mailto:a.sigal at bluewin.ch] 
Sent: Sunday, October 28, 2007 3:54 PM
To: Ben Swann
Cc: quattro at audifans.com
Subject: Re: Resolved! EFI + MAC-14 maxing ataround 5k RPM

Great you sussed it, and now you have well deserved rocket ship that you 
wanted. In the end it was very simple, but wouldn't an early check of 
plugs lead you to same conclusion?
Q: Could the injector timing be altered om MS, or just the amount?

Ben Swann wrote:

>Thanks for all the feedback and suggestions - even when I check things that aren't
>related to the problem, I end up making them better in the process.
>
>Ben

_______________________________________________
Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifanscom/mailman/listinfo/urq
<http://www.audifans.com/mailman/listinfo/urq> 
Have an urq question?  Check the Audifans Knowledgebase!
http://wwwaudifans.com/twiki/bin/view/Audi/UrQuattro
<http://www.audifans.com/twiki/bin/view/Audi/UrQuattro> 
Have an urq answer? ... Please help others by adding to the KB ... all contributions
welcome!

You can help keep the audifans site running by shopping at http://audifans.com/shop/