OWNED

Ok, the engine was finnaly put in today. Now im working on re-assembly.

Im doing emissions removal right now, I have the rotary resurections guide to emmisions removal all printed out and stuff... but some things im just unclear of.

1) On the oil cooler, does the smallest cooler line (the one attached to the front of the engine) go to the upper fitting on the oil cooler or on the bottom one?

2) When removing rats nest / vac lines... when I get to the solenoid lineup, do I just rip everything out. Or is something there needed?

EDIT: Ok none of the solenoids are needed... what about the round thing? (lol... gotta love my genius-ness)

3) On the emissions removal writeup, it says that there are two nipples on the oil filler neck... but there is only one on mine? wtf?

Here is the quote from the writeup:

"Use one of the 0" nipples to block off the unused on th oil filler neck, unless you wish to keep this connected to the charcoal canister (which you can do, via the original hose to the firewall). The upper nipple, by th fill cap, will need to be vented so that excess pressure dosn't build up in the crankcase and cause smoke. 'snip-snip'. If you leave the stock vent hose to the firewall intact at the lower nipple, you can cap off the upper nipple."

Thats about it for now.. as more questions arise if I cant search the answer or figure it out i'll post it here.

Thanks alot
Steve

Impreza2RX7

As far as the oil cooler, if its a smaller line, it may be a smaller fitting, and the lengths should be different, use common sense.

2: I dont know, but the only thing needed on Turbo cars is the Twin Scroll actuator, which you dont have if your car is an N/A so you should be able to trash it all.. you can trash it all if you have a TII if you remove the twin scroll..

3: You have one nipple because you have an N/A car.. If you have a turbo car, one of the nipples is on the block. Just vent the oil line to a catchcan..

Icemark

yes, you still need the vac solenoid for the FPR

SAiamNE

Steve dude.. Call me if you read this today...
I wanna switch exhausts with you...

243-2618..

Thanks
Chad

hondahater

iTrader: (2)

I thought all you needed was a vac sourse to the fpr??? Or is it differant on an n/a.

Icemark

The FPR is controlled by the ECU and solenoid, so no you would need it unless you are running a standalone FPR and ECU

jacobcartmill

iTrader: (6)

could you explain this mark? i have a stock ECU and no solenoid with just a vac line running to the stock FPR. how could i benefit from using the solenoid?

OWNED

I HAVE A TURBO CAR!!!!!!!!!! lol

Anyways, I got a few questions:

1) For the PCV... can I run the upper filler neck nipple to the TID pipe? And the cap off the lower nipple?

2) For the oil lines.... does the shorter line (the one comming from the front of the block) connect to the upper or side connection on the oil cooler?

3) The charcoal canister has 2 lines going to it... one going to the vac hardlines.. the other going along the firewall and down towards the fuel filter... where does this go and can I remove it?

4) The coolant line on the block that connects to the UIM by that pain in the *** 90degree hose... what is this for?

5) Im removing the Sub Zero start fluid.... I can take off the reservoir bottle, the unit on the back of the LIM by the fuel rails. What else?

EDIT: 6) Also... about the solenoid to control the FPR... which solenoid is it? What color is it?

Sorry for the questions... it seemed easy when reading the writeup.. but when you actually get it off and look at it, its not as easy as it sounds.

OWNED

Ok, I have the rats nest / hardlines removed, new fuel lines run, and blockoff plates should be here any day now. Anyways... do I need to do anything to the TB or any coolant related **** like that? Must I do the TB mod?

Someone please answer my questions, I knw they are dumb but the sooner they are answered the sooner my car will be on the road.

Thanks

jacobcartmill

iTrader: (6)

mark?

Icemark

There is most certinly a solenoid on the stock system, it is how the ECU controls fuel pressure.

It is called the Pressure Regulator Control Solenoid valve. It is the Orange solenoid, and found on all FCs regardless of Turbo or NA.

With a Vac source only, you could be dumping half your fuel back into the gas tank and stuck with just the min fuel flow at lift throttle (which will lead to major hesitations, and knocking when sudden throttle changes as found in accellerating).

patman

iTrader: (3)

fpr solenoid=orange. you dont really need it but its a good idea
pat

hondahater

iTrader: (2)

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/removing-vac-rack-345425/ check the diagram out in this thread. Here it says to just hook it up to a vac source.

WAYNE88N/A

The pressure regulator control solenoid is only for the hot start assist system...When the solenoid is energized, it shuts off the vac source to the FPR, resulting in higher fuel pressures to help the hot start. I'm in Houston (hot as hell summers), and all the times I've looked at the dynamic chamber air temp sensor input to the ECU (this is the signal the ECU uses to activate the hot start assist), it's been nowhere near the voltage input required for the hot start system, in other words, driving 50 miles in 100*F weather, shutting the car down for 30 minutes to let the heat soak really kick in, and the sensor input is still not "hot" enough to kick on the hot start assist system. Which means you gotta be REALLY hot (176*F is the "kick-in point) to even activate this system. Which means you can probably live without it. It was the only solenoid I left on the car during the rebuild, though, just in case

Impreza2RX7

1) For the PCV... can I run the upper filler neck nipple to the TID pipe? And the cap off the lower nipple?

Yes



3) The charcoal canister has 2 lines going to it... one going to the vac hardlines.. the other going along the firewall and down towards the fuel filter... where does this go and can I remove it?

Yes, you can, I removed my charcoal canistor, hardline, and left the hardline on the firewall to vent

4) The coolant line on the block that connects to the UIM by that pain in the *** 90degree hose... what is this for?

the thermowax in the TB

5) Im removing the Sub Zero start fluid.... I can take off the reservoir bottle, the unit on the back of the LIM by the fuel rails. What else?

Thats all I know of, I removed the reservoir and capped off the nipples on the inside of the LIM.

jacobcartmill

iTrader: (6)

*i have a vacuum/boost source going to my stock FPR.

could this have anything to do with me running lean @10psi with a walbro fuel pump?

OWNED

Ok guys thanks,

Im going to attempt to get my car finished today. Still need the block off plate set though.

The only other problem I have run into so far is the oil cooler lines!!! I need some help with these. A friend took em off and I forget which one went to the lower fitting and the top fitting on the oil cooler.

Can someone get me a pic of how the STOCK oil cooler lines are run please!!!

Thanks
Steve

OWNED

Anyone? Also, what does the Air Supply valve Solenoid valve do???? its on the back of the UIM. It has an electrical connection and a flathead screw inside.

patman

iTrader: (3)

it opens up for the power steering and ac, idling your car up sorta like an extra BAC. you dont really need it
pat

Icemark

Yep!

WAYNE88N/A

Owned- the oil cooler line from the front of the engine (the supply from the pump) goes to the top fitting on the cooler, then the bottom line returns to the engine at the rear housing, and on to the filter pedestal...

jacobcartmill

iTrader: (6)

could you elaborate or am i just getting on your nerves..

WAYNE88N/A

I don't know how the turbos integrate the manifold pressures to the FPR, but on the NA's, the manifold vac pressures are sensed on the other side (spring side) of the diaphragm in the FPR, to compensate for the varying absolute pressures "felt" on the other side of the injectors (the squirting side). In layman's terms, you always want the same amount of fuel pressure in the rail, no matter what the manifold pressures are, and this is what the vac source is for...

For the turbos, I would assume that the positive boost pressures are also compensated for via the FPR, otherwise you could conceivably have 15 psi on the "squirt" side, and say 30 psi on the rail side, resulting in a net injector flow of only 15 psi. So the FPR has to sense the boost pressures also, to keep the rail pressures constant...

Having said that, I can't explain what Mark is talking about, lol...

OWNED

Ohh.. well I dont have AC or PS. So can I just leave this alone?or should I unplug it?

Thanks man, the long oil cooler line was a B!T*# to get in... but now its in (all funky like and distorted... but in non the less)

Ok, I think this should be the last question:

On the very top of the UIM there is a "Air Supply Solenoid valve"(or some mombo-jumbo like that) It has an electrical connection and two big vac lines comming from it (that go into the intercooler) Anyways... to be honest (just like every thing else in life) I dont really know how it works. But I assume its the solenoid for the Air Control valve? Anyways... what do I do with this??? Do I just unbolt it.. and cap the 2 nipples on the intercooler.

Thanks alot
Steve