bostonspgs

iTrader: (1)

i am finishing a half done removal , i.e. getting rid of wires. i think i know the answer but double checking is always safe.
im removing all wires related to emissions and ac.but i came across a point where the asv is backfed to prcv seeing how the asv isnt hooked up i figure the prcv cant work properly. but the prcv is the only thing emissions related left on the vehicle(s4.5) is it safe to femove this.btw bacv is going to get replaced as its not there

HAILERS

,EDIT......................I see what your getting at. Both solenoids get fed by a b/w wire for power and what makes them pull in is a gnd from the ECU pin 2M. What this gnd would do is pull in the ASV to add a bit more to the idle for a moment or so (same happens if the pwr steering is turned to the right or left to JUST the ASV alone at times.

IN other words...........not to worry. Remove the ASV. The pressure regulating valve will work just fine. It was never effected by the ASV anyway because of the diode you see in the diagram....if looking at the diagram.

bostonspgs

iTrader: (1)

but if no emmissions and no p/s then what is the need for the prcv, and im using the diagram aswell but i did personally see the diode aswell (before i removed it,ehemm)
hope fully this is an unneeded item as i dont have emissions tests(or vaccum lines)and soon wont even have to go for inspections(can you say straight pipe)
hope i didnt f up

bostonspgs

iTrader: (1)

so 4 hrs later and still wondering if i needed the prcv .if so need to rewire it

HAILERS

When someone pays me money to post, I'll be more prompt in answering.

The FSM describes the reason the pressure regulator control valve exists.

Normally the pressure control Regulator gets a vacuum signal off the engine while it's running to control the fuel rail pressure. But durning Starting the prvc is pulled in by a gnd signal from the ECU to cut off any vacuum from the engine which makes the regulator put out 37-39 psi to the fuel rails for the start sequence. The PRVC also comes into play at the other times described in the FSM.......fuel and emissions section.

Then again what I described might happen only during HOT starts. I think that might be so. Check the FSM's description of it. EDIT: that is indeed the fact according to the FSM.

Other people just eliminate the prvc and run a vacuum line directly from the regulator to the manifold for vacuum/boost pressure all the time.

In other words..........prvc is not emissions related.

bostonspgs

iTrader: (1)

sweet ,sorry wasnt trynin to me rude just trying to see how bad i f'd up. thanks again

bostonspgs

iTrader: (1)

so here is my new thought there arent any vaccum feeds to the solenoid valve that runs to this vac gage. i know the feed to the primary rail is still there aswell as the one that runs to the pump. but where is it feeding from whereis it getting 37-39lbs?
if i follow the vaccum line off the other side of the solenoid it goes down and ends beside the exhaust manifold .it isnt capped either

basicly the gage thats there wether its stock or not while the car was running would say 4-5 pounds.same with engine not running .it never went up or down. i know im being a little vague in the question but if it only drew in 4-5 lbs where in turn does that change to 37-39 lbs? here is a webcam pic of the gage(red) and its dead end vac(green)

bostonspgs

iTrader: (1)

sorry too much thinking isnt good i get vary random and forget my point , basicly if this wasnt operating right would it cause a lot of hotstart issues? and would it need the proper vac feed to funcition correctly?