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

[Buchholz, Steven]

... I have not researched this myself, but it is my understanding that
on the MAC-11 the ECU does not activate the fuel pump relay until it
gets satisfactorily timed flywheel (and perhaps distributor) signals.
If I were in this situation I would put my focus on this angle ... are
you sure the distributor timing is correct?  Do you have the reference
pin in the flywheel?  Is it in the correct position for the MC?  Given
that this is a transplant, one other thing I would want to verify is
that there isn't some sort of a grounding situation which is causing
excessive noise on the signals.  Have you taken an oscilloscope and
verified that the engine reference, engine speed and Hall sender signals
look good at the ECU connector while the engine is being cranked?  

As to the engine codes ... are you sure the feedback mechanism is
working at all?  Have you tried forcing a failure and seeing whether or
not the associated code is getting generated?

Good luck!
Steve B
San Jose, CA (USA)
> 
> 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. 
> 
> I have provided details regarding the wiring on the newly 
> installed 5kt engine into '83 CGT in a webpage.  If anyone 
> has a good idea what to try next, I'd appreciate it.  I'm at 
> a dead-end right now - short of testing some suspect 
> components, but everything keeps checking out OK.
> 
> Here are the details and this information should be useful to 
> anyone doing an MC or similar conversion.    I wish I'd had 
> this info. available in concise fashion when I started.
> 
> http://ben_swann.homestead.com/MCWiring.html
> 
> TIA
> 
> Ben
>   ----- Original Message ----- 
> 
>   I'm troubleshooting an MC-1 with MAC-11 ECU, wiring harness 
> and sensors that is being installed into an '83 GT Coupe.  
> 
>   <snip - details captured in webpage> 
> 
>   With key on I have power to the coil 15, and so far all 
> checks indicate things are as they should be.  Yet when the 
> starter is engaged, I get no spark - using a grounded plug on 
> #1 wire to test and the fuel pump does not turn on.  What is 
> the trigger for the pump?   
> 
>   <snip>
> 
>   So what would cause a no spark/no fuel pump on cranking, 
> yet have no codes generated?
> 
>   TIA for help from those willing to follow through what I've 
> done so far.  I plan to put up a page on the wiring 
> integration once complete.
> 
>   Ben