What are people using to replace their Digiplex?

Could you post who rebuilt the WUR? Thanks.

George

 

Larry at CIS Flowtec…. Many references to Larry on this site…..

 

Thanks!

 

What exactly is European tune from a seat of the pants experience?

 

Out of curiosity, how much is "not cheap"? For those of us who are not purists, might it be worth changing over to a modern aftermarket ECU with DCI?

 

I had an 81 for a little while that had a (very primitive now) aftermarket ignition.

Pulling away from a standstill was night and day different from my bone stock QV.

 

So Forza has an electromotive replacement in the works?

Great to hear!

 

The last iteration of the Forza Electromotive system for the 308 was quite crude in comparison to any of the Digiplex or Microplex systems. The Electromotive system had just one or two adjustable points on the ignition advance curve....and no provisions for sensing engine vacuum/load. The factory boxes had the capabilities to generate up to eight different advance curves. In other words, the factory system was far more sophisticated in creating the optimal advance for the current engine rpm and load conditions.

 

But you can't change the factory boxes. They are fixed.

Unless you pull them out and ship them to Dave - which is looking like a better alternative each day now.

What I am finding out with electromotive now is no one has a clue how to deal with it. NO one around here. I have it in a Scirocco and I have found only one person here in town that can put it on a laptop and deal with it - and he was the guy that I had install it. With Electromotive NLA, I am a sunk ship with that thing once my guy is gone.

 

Hi Guys,
I just happened to come across this thread due to a 1982 US spec 308GTBI I'm dealing with. If anyone has a way for me to get in touch with David Feinberg, I'd be most appreciative. Weird issues going on with this particular beauty.

Thanks,
LG

 

Hello... I purchased new ECU's from David a few years ago ... here's the latest info I have for David from my emails communicates I had with him. Wish you luck!

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David Feinberg

Sarasota Italian Garage

24705 83rd Ave E

Myakka City, FL 34251

(603) 493-1696

www.fluentinferrari.com

 

David Feinberg sold his Sarasota Italian Garage business, but still does Digiplex/Microplex stuff. The last message I got from him about how to reach him is:

I can always be reached at 603-494-1696 or [email protected]

 

Thank you guys.

This project is a weird one. I was given a car with a box of parts and a parts catalog to put back together. Now, it isn't like I've worked on a ton of these, but i have done several that I have diagnosed (simply), disassembled, repaired and reassembled and had no problems with them. This one is a 82 US spec 308GTBi. It was disassembled 5 or 6 years ago and sat that way. I know the manifolds were sent out to be recovered. I can see there was some water infiltration into the vehicle, the metal relays have surface corrosion as well as all the fuses. The fuel was super-stagnant. System drained and filled with fresh. Fuel pump has been replaced as well as the fuel filter. Caps, rotors, wires, RED extenders replaced. Timing belts replaced and timing verified. Following the wiring diagram in the owner's manual, we found the TDC sensors and engine speed sensor installed in the wrong locations. We have 220psi compression after 8 seconds of cranking. Ignition wire order fully inspected and found to be correct (wiring diagram confirmed). Coil wiring is correct as well. All wiring traced out to digiplex units verified to match the banks they are attached to (electrically).

When we crank over the car, it spins up, then sounds like it is trying to catch. Every time this happens, the fuel pump relay is clicking on and off along with the hard cranking (when trying to catch). I've had it running, but seems like it either isn't running on all cylinders or something else is off. It will idle, one I get it started, I can bring the rpm's up but we get some misfiring (very little). then if we shut it off, it takes a long time to get it to start again.

Kind of pulling my non-existent hair out at this point. I'm not sure if it's fuel related, ignition, electrical, or a combination of all the above . I do appreciate the help I receive, this is a good group of fellows.

Regards,
LG

 

First thing that I would do here is remove the fuel pump relay and use a jumper wire to connect the female terminal 30 to the female terminal 87 in the relay socket like this:

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The fuel pump should run even with the key "off". If it does, and seems to be running well, try starting the engine (with the jumper in place) to see if you get any different behavior. There is another relay controlling the fuel pump relay, and this other relay is controlled by the safety switch on the airflow metering unit, so weirdness in this "safety switch system" can cause the fuel pump relay to shut off; whereas, with the jumper in the fuel pump relay socket, everything in the safety switch system is out of the picture.

 

I had David rebuild my QV ECUs and my car has never driven better. It is faster, more mid range torque and sounds better. It really is faster. I've driven many US and Euro 308s and my car def feels more like a Euro 308 when driving it. I absolutely LOVE it. Hats off to David, he did a great job!

 

Well, I have great news!!
Got it all sorted out. I swapped the Digiplex connectors and ignition coil high tension leads, car started like it normally should and ran great with no sputtering or popping. Didn't get to speak with David, he was on a road trip and wouldn't be able to talk till Friday. I just kept plugging at it and stepped back and said "Let me try this" and see what happens.

I SERIOUSLY DO APPRECIATE EACH AND EVERY ONE OF YOU GUYS THAT ALWAYS HELP ME!

lg

 

I wonder if this was part of the problem - perhaps the TDC sensors were actually in the right locations, even if the wiring diagram disagreed. Switching the Digiplex harnesses then got the right ignition box paired back up with the properly matching TDC sensor!

Gordon

 

I have noticed a weird issue though... After running a while, if I go to start it, she just cranks. If i press on the fuel distributor flap, I hear fuel pressure movement and then when I crank her, she starts up.

What the heck could be causing this??

 

Immediate loss of fuel pressure at warm engine shutoff can create this symptom. Have you measured the regulated supply fuel pressure after warm engine shutoff? It should remain about 3 bar for 20 minutes or so.

Also, just not being properly tweaked up can cause this issue (i.e, cold starting can be more forgiving with a squirt of fuel from the cold start injector). The Warm-Up Regulator also has to be doing the right things -- for example, during warm restarts (low vacuum), the WUR should lower the warm control pressure = adds richness to aid restarting. The WUR is the thermo-mechanical "computer" that controls your K-Jet without Lambda system -- you should verify the cold control pressure and warm control pressure (both with, and without, vacuum). Do you have a copy of the 281/83 Mondial 8/QV WSM?

 

I believe I do, but I'll check.
Where would I be testing ?