MFI linkage/pivot point

[tobluforu]

72 MFI. There is a long rod that attaches to a pivot point on the tranny. This rod goes through the firewall and attaches to another pivot point on the back, left hand side of the stack. It looks as if this pivot point is mounted to the left side stack, but it's hard to tell without taking the stack off. On my car this pivot point is loose because it looks like it missing a bushing? Does anyone know what I'm talking about? I'm trying to figure out how to fix this and if indeed the bushing has fallen out? The car's throttle linkage still works, but this point is wobbling like hell.
Thanks

[Peterfrans]

the left stack indeed has a pivot with two plastic bearings in them. These tend to become brittle with age. I had mine replaced with bronze

[Peterfrans]

with pic

[tobluforu]

Do you know where to get these as the bushing is gone and I have no where to start or even what it looked like? Also, how does one remove that pivot point assembly without removing the stack?
Just saw the great pic and it's the piece in lower right hand side of the stack.
Thanks

[Peterfrans]

I believe these might fit: http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=901-423-253-00-M260&catalog_description=Accelerator%20Lever%20Bushing% 2C%20(2%20required%2C%20sold%20per%20each)%2C%2091 1%20(1965-89)

I think the only way of replacing these without removing the stack is by removing the engine. They are really sandwiched in between the stack, the fuellines and the mfi pump

[tobluforu]

Just did a massive search, found a great post from a few years back with a pic of the same part that someone was also trying to find/buy. Peterfrans-thanks so much as that is the part number, and it looks like it's kept on by a C clip, but not sure. Can anyone confirm this?
Thanks

[356RS]

Yes the C-clip holds it on. Give Matt Blast a call. He runs "Eurometrix" and rebuilds the MFI throttle bodies. He has the parts you need. Phone # (978) 448-2557

[FenderBender]

I just installed my new one's from our host. I went with the bronze ones 901.423.253.00. They work great.

I had my stacks off for cleaning. It will be a PIA with them on the car but it might be possible.

OOP's I did not read the link posted above. On the bottom left of the above link click on Canyon that is the bronze one's.

[boba]

tobluforu,

The length of the rod from the bell crank, the one you are talking about, is critical to the proper set up of your MFI linkage. Do a search for CMA and follow it after you replace the plastic bushing.

With that bushing broken or missing your MFI will just not be right. After you get it set up properly you will not even recognize your car.

[Zeke]

Originally Posted by boba

tobluforu,

The length of the rod from the bell crank, the one you are talking about, is critical to the proper set up of your MFI linkage. Do a search for CMA and follow it after you replace the plastic bushing.

With that bushing broken or missing your MFI will just not be right. After you get it set up properly you will not even recognize your car.

As long as the correlation between the pump rod, the push rods and the butterfly rods are in proper adjustment, the length of the rod to the bell crank is only a function of the pedal travel. Sure, it needs to be right, but it's not all that critical as long as the pedal travel is set up to bottom out when the butterflies are wide open. There is more than one way to achieve this.

[tobluforu]

Looks like it's possible to install these bushings with pump on. The trick, I guess, is to cut the inner bushing in half and slide them in. Once you remove the C clip there is no way to remove the pivot arm completely as it hits the pump?? Just going by what I have read. I know splitting the bushing is not the greatest thing in the world to do, but anything has got to be better than not having one in there at all.

[tobluforu]

I was able to install the bushings with pump on and it took about an hour. I bought the vinyl ones and instead of cutting one in half, I used a razor blade and cut one side. I was able to push it on the shaft using a very long pair of needle nose (these are key). I got lucky and the C clip went on the first time after I spread it just a tad. I guess I have been running without these for years now and I can't believe the difference.

[FenderBender]

Good to hear it worked out. I would suggest checking to make sure your rods return all the way down. I say that because someone adjusted my rod with the bushings gone and with new bushings my pump rod was not closing and running rich.

[tobluforu]

Originally Posted by FenderBender

Good to hear it worked out. I would suggest checking to make sure your rods return all the way down. I say that because someone adjusted my rod with the bushings gone and with new bushings my pump rod was not closing and running rich.

Yep, did that after and the long rod from that pivot point to the rack was too long. All the others were still spot on.