No Start[spark or fuelpump] condition with no codes on MC-1 CGT conversion

[Ben Swann]

Thanks Eric, and all ye Q'fans,

So far I have checked the Hall Distributor is working fine and wiring to the
ECU - all work as expected.

The fuel pump is a crappy FLAPS aftermarket pump, but good enough to push
fuel through the injectors.  I have confirmed injectors spray with good
pattern.  Alhough I will be installing an OEM pump, this is not the problem.
I have confirmed pump operates fine via FP relay when jumpered/ 4 pin relay
is used.  Just the 211 relay wired per 5kt diagram is not being triggered to
operate.

The problem revolves around not getting a spark, which is why I checked the
Hall Distributor was operating.  As per. diagnostics guide(s), .01V when in
window and 4.6V when out of window, and I checked the wire to ECU/27, so the
ECU should be getting the signal.

I will swap ECU among  next checks.  I can check that I am getting 12V to
coil while cranking.  I did verify system being fed 12V during cranking as
another poster said he had experienced the Ignition swith to be flaking out
when turned to start - I will double check this again, as I did not a
actually check the switch, only that I saw power being applied to the
relayed circuit as starter was operating.  Also, the switch worked fine with
the old engine.

I can try the timing light trick too.   Yes - distributor is lined up
properly - no question.  If it were (solely) a hall out of window or
distributor misalignment problem, there would have been a code generated.

Eric, I am very familiar with your site and several others and glad to have
seen your car in person.  I checked your wiring stuff - good, but a fair
number of differences as you have the earlier engine.   But not to be cocky
as I have a problem I have not been able to isolate yet, and solicit the
collective wisdom we have here.   As well as any forgone esperience, I
appreciate links to any wiring info. that may help fill in any gaps,
although I think I have the wiring down as well as anything I've read so
far, and will post on a webpage accordingly.  This is mainly because I've
referenced the other sites (esp. very good http://4ktq.digitalnoise.org )
and cross referenced and verified the information and even found some
discrepancies.  When this swap is completed, I will be able to post the most
accurate information regarding the wiring for an MC swap.  For now here is
what I have + any news like verifying the hall circuitry - still need to
check the Darlington transistor, coil, etc.

http://ben_swann.homestead.com/MCWiring.html which I look forward to making
fairly comprehensive

and a little bit on the overall modifications the car is getting, but I
really haven't had the time to document  - this car has been well -
modified!  Suspension, brakes, exhaust, etc.
http://ben_swann.homestead.com/GTCTurbo.html

Ben
----- Original Message ----- 
From: "Eric Sanborn" <eric.ql at sofadog.net>
To: "Ben Swann" <benswann at comcast.net>
Cc: <quattro at audifans.com>
Sent: Thursday, September 30, 2004 8:13 PM
Subject: Re: No Start[spark or fuelpump] condition with no codes on MC-1 CGT
conversion


> Ben Swann wrote:
>
> >Q'phile and engine swappers,
> >
> >I did not get any feedback yet, not that many have ventured this deep,
but figured someone may have encountered similar problem - I don't know if
this is because of something wired wrong, or a faulty component.
> >
>
> What fuel pump relay are you using?  Is it a MC unit?  Have you tried
> starting it with just a headlight relay in the socket?  This would make
> the pump run when ever the key is in the on condition, but would
> temporarly remove one faulty system so you could focus on getting spark.
>
> I struggled with my swap for a while before I realized I had forgotten
> to put 12V on the coil.  I am sure you thought of that however.  Have
> you made sure you still have 12V at the coil during cranking?  Maybe you
> have the run circuit instead of the start/run circuit.  Have you tried
> putting a timing light pickup on the coil wire just to see if there is
> any spark?  Is the distributor lined up when at TDC on #1?
>
> I don't know that it will help since my swap was a KH, but who knows.
>
> http://sofadog.net/4ktq/Step3.html
>
> I'll keep thinking about it.  Let us/me know if you are successful.
>
> -- 
> Eric Sanborn
> '85 4ktq
>
> http://sofadog.net/4ktq/
>