Question about 87 t2 fuel pressure regualator
 

well i took off that little cap that covers the end of the regualtor and i found that the screw was just about ready to fall out.

ok i have heard people say that after teh fire they have found that screw in what was left of the little plastic cap. Was i very near to disaster here??

i turned the screw back down tight,,is that the way it is supposed to be or is the screw supposed to be loose a little,,i wouldn't imagine it should be loose at all but i don't know for sure so that is why i am asking

should i put some thread lok on it so this doesn't happen again or is the regualtor now ruined and i should just get a 89+ one?

TTT

If it has a little plastic cap(sort of white)and a screw in the end,it is the pulsation damper.See the posts up top.

yeah that is the pulsation damper... replace it with a S5 one, directions are in posts above...

Justin

Hullo, LLADNAR. I'm going to post about five jpgs of a PD that is at first whole and then broken apart. But first, on the screw. I noticed it has nine threads, so I suggest turning the screw nine turns in. At that point you should feel some slight resistance. You might turn it another turn, but I think no more. Just enought to feel the resistance. Turn anymore and you are putting stress on the rubber diaphram and pulling it towards the head of the screw. Use LOCKTITE by all means. This PD has been in a fire that resulted in the car being totaled by Allstate, passing thru an incompetents hands, then to my butcher's hands. Cost for me was 650 and a migrane with the title being changed. So, this fire was a positive thing in the scheme of things. Now, the JPG:

And number two: EDIT; I just noticed someone told you, you could not put the screw back in. Bull droppings. If you pressure the fuel system, and there is no leaks from the PD (screws out), then that indicates the rubber diaphram is intact, and as far as I'm concerned you can put the screw back in. Just do not keep screwing the thing until you can screw no more. If you do that, you are pulling the rubber diaphram agains the force of that large spring, and that spring pressure will be there all day long, day after day. You don't want that. As someone explained several months ago, and I think him right, that screw moves with each pulsation. I think they could have done without that screw. The designers brother designed the logicon and wiper switch, so you see, its a genetic thing.

How about a third:

And, four:

And before we do five, I forgot to mention that the screw goes into the diaphram, and if you screw beyond the seven turns of the screw, you are then pulling the rubber diaphram against the large spring. So you see if you go hog wild with tightening the screw, you are putting 24 hour a day pressure against the rubber diaphram because of the spring pressure. The spring I reckon was meant to dampen the pulses of the injectors. You can see those pulses if you put a fuel gauge in line with the fuel rail. The needle will twitch back and forth during the pulses. At least thats the way I see things. Soooo, here's Johnny!.........