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Wed Aug 27, 2008 8:51 am

Does anyone have any info on:
Will a wiring harness boxed for 70-71 FI work on 1969?
As i understand there were no major changes until 1972- ECU, throttle valve switches,Pressure sensor,etc
I guess the plug from the harness to the ECU should all be the same?

Wed Aug 27, 2008 9:08 am

There was a significant change between the '68/'69 generation of D-jet and the '70/'71 version. The pressure switch was eliminated, and the MPS was changed to include that function. Also, the throttle valve switch changed. Some pin assignments changed at the ECU to reflect these changes.

If you study the two wiring diagrams you might be able to figure out how to alter it to work. You might have to remove pins from connectors and solder/crimp them. Lots of work,but if your old one is fried or missing, you may have to bite this bullet.

There were posts about someone who repops them but they are something like $3-400.

Wed Aug 27, 2008 9:54 am

Thanks KTPhil,
I have a 69' with what I am told is a 70 engine- I have it running.
I believe all the FI parts are 69- but the car has a auto- trans and things like the aux air reg are from a standard model and - well it appears that some of these parts are getting hard to come by and the wiring harness is looking a little worn and I saw a add for a new one in the box labeled 70-71
Thanks again for your info and advice I will trace the connectors and see what I have.

Wed Aug 27, 2008 11:03 am

If you can read part numbers on the MPS and TVS, or post photos we can confirm the vintage of the parts.

The '70/'71 harness would have too many wires to the MPS and no wire for your '68/'69 pressure switch. So you'd have to rewire the connector (reusing your old one if you've got it) and run extra wires to the PS.
Depending on how handy you are with tweezers and a soldering iron, this could be straightforward or a nightmare.

The connector is the same at the ECU, but some pins are wired differently.

I never really understood the need for the electric AAR on automatics. I speculate that the automatics needed a better rpm boost on a warm (neither cold nor hot) restart, and the electric would do that. So you might be near stalling for a minute or two on a warm restart with your mechanical AAR, but there is no harm done.

Wed Aug 27, 2008 3:49 pm

Ya KTPhil,
I'm having trouble knowing if it even works - it appears to be one out of a standard- trans model.

I need to determine if the pressure switch is working as the previous owner modified the pressure sensor by knocking out the plug and inserting a screw
-for smog no doubt - as the rest of the car seems pretty stock.
The temp switch-external -cold start -he questioned as he explained to me what it might need,

Thanks for the additional info!