neoanderson

Breaking a couple of nipples and finding out that these dang things are 100-250 dollars can make you go hmmmm.

The ones broken are the PRESSURE REGULATOR SOLENOID VALVE and the EGR SOLENOID VALVE. Do you really need them.

If they are bypassed what do you do with the disconnecting hoses.

http://www.scuderiaciriani.com/rx7/v...se_diagram.jpg


Neo

spooledUP7

Well, you seem to have broken the only donors that I could think of. I used both those solenoids to swap with two other broken nipples. They have the vents on them and I simply removed the vents.

You will need the Fuel Pressure regulator Solenoid (A), but you don't need the EGR (Unless you have a Cali model). You could do without the Double Throttle Valve solenoid (G), but you will need to disable the double throttle as well.


I found a diagram on the web where someone reduced the amount of solenoids in the loop, but I can't remember where it was. I also had some issues with it as well, and I haven't accepted it as the "Correct" interpretation yet. Maybe someone can point you to it.

luneytune

I broke off a turbo control nipple and fixed it by.

1. Get about 4" of 1/8th pressure tubing, boost gauge tubing.
2. Cut a piece that goes the length of the nipple and into the solinoid body.
3. Slip the nipple over and into its old home position.
4. Use 5 minte epoxy all around the break and bock to the main body of the solinoid and as far up to the end. Make sure the areas are clean first.

Works great and a lot less than Mazda wants.

efiniracing

I tried asking this same question several times but could'nt get any real answers. I broke my solioid for the double throttle, so I just removed my butterflies. Now I'm not sure what to do w/ all the hoses that are left over. Where do I plug it up?

spyfish007

Don't drive without the pressure regulator!! You could take this opportunity to upgrade it to a SX or HKS fuel pressure regulator and be done with the solenoid. This mod is usually done by single turbo guys so if you are headed that route then there you go. You can elimate the EGR all together. You could get a block off plate . . . . . LOL.

93BlackFD

i bought the block off plate set from rx7store, can i block off the ACV and other things on the stock ECU?

just put resistors back? it seems to have some sensors in the ACV, what do i do with those?

Mikey

like everybody else says...keep the FPR solinoid. that is the only one i have under my manifold. what it does is bleed off extra vacuum to increase your fuel pressure to your injectors. but also...if my mind serves me right, the solinoids are interchangeable with other gen rx-7s. so go find some at a junkyard if you really want them. (but don't take my word on it)

Shinobi-X

Great thread. I was thinking about fixing my broken solenoids too...until I go non. seq. and get a new ECU.

flunkysama

iTrader: (4)

If I remeber from reading the manual, the FPR solenoid only comes into play during starting on an already warm engine. Normally the FPR sees manifold vacuum/pressure. This means fuel pressure at the injectors will go up and down with the manifold vacuum/pressure. The FPR solenoid can let the FPR see atmosphere rather than manifold. This will cause higher fuel pressure (unless you are pulling boost).

Why do they do this?..
to prevent vapor lock when restarting a hot engine.

IMHO, you can probably drop the FPR if you bypass it rather than venting it to atmosphere.

DamonB

Yep, yep and yep again. If you want to bypass the FPR solenoid, just connect the FPR directly to the manifold but have the understanding that hot start idle quality will be reduced.

Dudemaaanownsanrx7

iTrader: (23)

i agree with luneytune epoxy works great on alot of things. they have some pretty awesome stuff on the market, somthing called c7 and c11. sets up like a rock, i have repaired radiators, broken nitrous nozzles, even the passengerside door handle i fixed with a solid epoxy. be sure u get somthing good tho, som of it sets up kinda rubbery and doesnt hold very strong.

Domestic513

I have a question. I have stock ECU and was told by someone to take out every solenoid including the FPR one. Well I did, and now I can't boost or get and fuel pressure past idle. I know its cause I dont have the fuel pressure solenoid, but what do I do now? How can I get my car running again?

JONSKI

neoanderson,
Get yourself the "good" vacuum hose diagram. I have it hosted here: [right click] -> [Save As...]
http://www.rpi.edu/~skrzyj/rx7/93vachosescolor.jpg



efiniracing
"I tried asking this same question several times but could'nt get any real answers."

When was this? I'm usually on top of the solenoid/ hose job questions.



spooledUP7,
The only other solenoid that can replace the FPR solenoid (A) is the ACV Switching solenoid (C). The solenoids need to be the same type to be interchangable.



Be careful with the epoxy. A solenoid has a moving piston inside and if it gets stuck then the solenoid is junk.

JONSKI

EVERY solenoid? Is this is a joke?

rynberg

No ****. Domestic513, if you are serious, you need a good bitch-slapping....

Haggard

Go non sequential then you dont need any of that crap.
If you need any solinoids let me know. I have a box full of solinoids.
-Dave

dubulup

I'm going to say most of the solenoids are interchangable..."All 8 solenoids are exactly the same. The only difference is where the filter is on the one end and the color of the dot on top of the solenoid. They all measure exactly the same and work exactly the same.

They are all hitachi AESA127 solenoid valves. They are all the same part number from Hitachi."

quote from Timothy McCreary

I'd post a pic of all 7 (that a '95 has), but I can't for some reason.

Domestic513

If getting a Power FC. Will that by-pass the use of stock solenoids?