GT40 electrical/fuel pump issue

Justin,

Justin, this is a very cool discovery. I would have never stumbled upon this as an issue. Congrats on the solution. I would be very curious to know if this was a widespread manufacturing issue with the ECU.

Yes the 300 is the newest one

Which tune is Tom doing for you,the 290 or the 300? I had him do the 290 for me since the 300 hadn't been cracked yet. Wondering if it's worth it to get the 300 also.

Just thought it might help find some ECM’s guess there is more info needed

Gary are these the ones your talking about.
http://www.rockauto.com/en/catalog/ford,1992,mustang,2.3l+l4,1134054,electrical,engine+control+module+(ecm+computer),2896


Some info on testing the ECM
http://www.rockauto.com/en/moreinfo.php?pk=25978&cc=1134054&jsn=677

Sander looks like the ECM may have seen too many heat cycles. Once it gets too warm now it becomes unstable. You can prove this by letting it cool for 30 mins or so. Lift the engine cover and wait 30 mins. Then try to restart.

After a bit more research it appears the ECM they found compatible is from a 2.3 litre 4 cyl Mustang. These ECM's used the same batch fire method for the injectors as PCM did with the GT40.

I would just like to add that the original guy who figured this out had said you could also use a Ford Mustang ECM marked D1L1 in addition to the C1A1. They seem a little easier to find although I have not heard of anyone using one.

Gary the C1A1 variant of the Ford EEC1V must use the same output pins on the 60 pin ECM connector as the PCM GT40.

There are many variants of the EEC1V even in Australia. I went to a local wrecking yard and cut the car loom plug and removed the 60 pin connector from a junk ECM to make up an extension cable to relocate the ECM in my Sport to far less "hostile" area under the dash.

Trip (Jander??) the pins are easy to replace in the connector just pry out the red insert and the pins are then released.

Ford Australia used the EEC1v computer on the 6cyl Falcon for quite a few years and these were very popular cars downunder. The pinout on this ECM was very different to the pinout on the Gt40.

I may have a play with this setup and source one of the C1A1 units from US along with the Moates chip and programmer/reader and see what is possible. Would be nice if you could then enhance the tune for other performance upgrades like my Megasquirt ECM.

Anyone coming downunder this year for a ski with room in luggage

Gary, not to go far off topic but did you notice an improvement with the new 300 Chip in your 95?
My 95 runs so good I have not even thought of an upgrade. But if yours is much better maybe I should.......

Here it is - Link to PN

You will want the 300 tune.I have had mine up and running with a C1A1 ECM and the 290 tune,300 was not ready yet when I had mine done.Mine being a 95 had used the 290 tune anyway,the 300 was a newer tune and had addressed some idle issues. I think the hardest thing will be to find a C1A1 fast. One of the PN guys burned my Moats chip,I had it shipped directly to him so that I was not paying shipping back and forth. I think it was pretty impressive for some "hobbyists" to come up with a fix that the "pro's" idea of repairing the issue was to do a complete engine change I have 50 into the ECM and 75 into the chip

Sander, do you have a battery switch? If so, remove the cover and make sure the internals are still intact, connections good.

Then, as I'm sure you have tried, look closely at that red wire, where it comes from and where it goes, look for bare wire shorting. See if there are any splices or crimp on connectors in the area. When you cleaned those contacts and it seemed to be fixed, you may have just moved something else enough to cause it to connect for a while. You wiggled the red wire, try wiggling everything in the area that might have moved with your wire cleaning to see if you can find the bad connection.

Oh my god, bummer of the century (well for me it is..) ;same problem again!

Checked/cleaned those connectors again. Spoke with my buddy who got it going last wednesday, he suspected the thick red wire right next to them had something to do with it so I cleaned and wiggled there, but nothing.
Boat problems always suck, but this intermittent stuff is the worst! Especially if someone drove 3.5 hours to go wakeboarding with me...

The culprit


So relieved it's fixed! Cleaning the contacts with contact cleaner was all that was needed it seems. Thanks for your help all. Lewy, your info in all those threads is amazing.
Hadn't had a chance to run it much yet after we got it going, but hoping to ride some sets behind it tomorrow to see how it holds up. Confident it's good now though

lewy2001 wrote: Never been to Costa Rica :)

Any $250-tickets from Aus to CR out there?!

Heading to boat tomorrow to check things from that screenshot. Well you're involved in fixing it anyway lewy2001!