TR FD question

While taking apart my FI system on the TR, I went TOO far!!!!!!!! I removed the plungers, on both units, thinking that the slotted screw holding the plunger was bottomed out. Well, it is not....it adjusts the plunger depth.

How far should the air flow sensor be pushed down, to where the back portion will start moving the plunger? I assume not much, if any.

Jeff: Can you check? Push the air flow sensor down and see if you can feel the touch of the plunger......you should be able to.

Thanks

Henry,
This spec should be in the WSM...as the sensor plate height is usually set to either the top edge, or the bottom edge of the funnel. Hopefully, Jeff can send you a photo of his to clarify my ageing thoughts.

Regards,
David

David: FYI: The resting position of the sensor plate is not set by the plunger. There must be a gap between the plunger tip, and the sensor plate lever.......this assures that the plunger will rest in it's most downward position, when the engine is off......so that no gas can "creap" into the FI manifold.

It appears that the resting position of the sensor plate is "fixed", and only adjusted downward by hitting a pin "with a hamnmer"!!!!!

Since I did not disturb this, I don't want to go that route.

If the gap is too large, then the sensor plate, and throttle, will have to open too much before contact with the plunger.

I may have to experiment.

David: FYI: The resting position of the sensor plate is not set by the plunger. There must be a gap between the plunger tip, and the sensor plate lever.......this assures that the plunger will rest in it's most downward position, when the engine is off......so that no gas can "creap" into the FI manifold.

It appears that the resting position of the sensor plate is "fixed", and only adjusted downward by hitting a pin "with a hamnmer"!!!!!

Since I did not disturb this, I don't want to go that route.

If the gap is too large, then the sensor plate, and throttle, will have to open too much before contact with the plunger.

I may have to experiment.

Oh what fun it is working on a Ferrari!!!!!!!!!!

Henryk: I posted a response to your FD question on the fchat "diesel oil" thread. The plate should be at the transitional "edge" or point where the entry portion and the concave "chamber" portion meet, just as it contacts the plunger. At least that's what it looked like using my eyeball. If this does not make sense just let me know.

Henry,
I understand the dymanics of the sensor plate height...I though the plunger was the adjustment pin you were referring to...

My mistake. Sorry for the confusion.

David

Jeff: I say that in FChat.....I did post a response. Let's continue this in this forum.....OK?

David: No problem.....I appreciate your input. It was interesting to note that the sensor plate has nothing to do with the plunger adjustment. It is the "gap" that is important.

If I learn any more, I will be able to retire in TX, and work for JRV!!!!!! HAHAHA

BTW: There is no mention of this in the WSM......probably one of those things that we are not supposed to touch!!!!!!!

Okay....does my observation make sense? Not sure how to describe the situation clearly.

Jeff: 3/16 sounds about right. After your "senses" come back (LOL), try this: Push VERY slowly downward on the sensor plate. You should be able to "feel" when it touches the plunger......again, NO reason to see this. I would like to know if it is still 3/16 inch.

Thanks.