FDNewbie

iTrader: (10)

I'm pretty sure the issue is something real simple, but as it says, I'm a newbie, so bear w/ me here

Here's some background, since I think it would help if you knew what was messed w/ under the hood...

Last week, a friend (revsteve) and I went to get some hands-on experience w/ my FD

We put on a PFS SMIC, greddy elbow, and hard extension pipe (fabricated). We also put on one of the two M2 hard intake pipes to my M2 airbox, and got halfway through a y-pipe install when we realized you gotta take the airpump off to get the y-pipe out...So I said let's save that for later, cuz I might as well replace the airpump w/ greddy pulley kit, since I have freeflow exhaust.

That's pretty much all we did. When I was driving the car home, the boost gauge (autometer, old one, so prob mechanical) wasn't working.

Although I'm (temporarily) leaving the AWS hose unplugged, I don't think that has anything to do w/ my problem?? (gonna use block-off plates, get rid of AWS completely)

I'm pretty sure we reconnected everything as it was the first time around. I'm sure you're thinkin "check where the boost gauge connects." If I knew where that was, I'd do it lol. Hence, the newbie bit.

If someone can gimme some help here, that would be great.

OH...and I AM boosting. So it's not just some ghastly boost leak haha. I know it's just the gauge cuz I have a HKS BOV, and she's blowing just fine, and the car is pulling nice. I gave her WOT a couple of times, and the gauge didn't even move. It stays on 0, which def. reassures me it's not working, cuz not only does it not show boost, it won't even show vaccuum.

Thanks

Sgtblue

iTrader: (16)

Again, from another "Newb"....the tube for the boost guage typically runs to the UIM, passenger side, above where it bolts to the lower manifold (behind the air pump). Depending on how it was affixed, you could have knocked it off or broken it. Either way, it's probably not a big deal. I used a small amount of silcone adhesive caulk around mine to keep it from coming loose.


BTW, I'm pretty drunk right now, and reading about the "alpha3beta3 yadda yadda" in you sig reminded me of a Frat party I went to years ago and instantly induced bed spins.

FDNewbie

iTrader: (10)

Golden...Absolutely golden haha. My God that was simple.

Get this...I remember when we were trying to unscrew the nuts off the y-pipe... Steve's hands slipped, and something broke. Guess what it was? It was a hose lol. And yea I said it right...BROKE. That rubber hose was so hard, it broke and shattered like glass lol

Apparently, that wasn't the only hose that was broken. I couldn't even tell the input for the boost gauge was missing on the UIM cuz there was no hose there right now lol. I went and cut a small length of hose that was left over from my BOV install, put it on the UIM, ziptied that end, found the wire for the boost gauge that was clear as DAY now that I was looking for it, put it in the hose, ziptied that, started her up, and vioala. Boost gauge working! Quickest fix I've ever seen on an FD haha

Thanx Sgtblue. Madd props to ya =)

FDNewbie

iTrader: (10)

I'm bringin this back up even tho my boost gauge is working now cuz it has the background of wut i was messin w/ in my car...

I have the common PFC bouncing idle problem, and I just noticed today that when the idle was bouncing around, the boost gauge was too?? It was going from vaccuum to 0 and back...That normal? Or just me??

Anyone else have this issue? Note: my AWS hose is still vented (unplugged) at this point. Dunno if that has anything to do w/ it, although I read some ppl lost boost after 5K rpm w/ it unplugged...

FDNewbie

iTrader: (10)

???

rynberg

You need to plug the AWS hose, I'm surprised you haven't already made a big oil mess in your engine bay. Also, the hose will draw air into it so you are making a big mistake leaving it vented.

Once you've done that, I would reset the PFC and do the proper idle learning technique with it -- let it idle 10 minutes, turn on rear defrost and let it idle 10 more minutes, turn on a/c and let it idle 10 more minutes. Seems excessive but you won't have the idle bouncing problem anymore....

911GT2

The PFC idle bouncing problem is very normal, and when your idle bounces, vacuum should change too. All normal AFAIK.

rynberg

No, it is NOT normal and it should not do it. If it is doing it, then you either didn't let the PFC properly learn the idle or you have a mechanical malfunction.

911GT2

I let my PFC "learn" my car two or three times, and it never did it correctly. As soon as Kan got a hold of it the idle smoothed out to its current buttery smooth state. I'm very unconvinced of the PFC's ability to "learn" to idle properly.

And when I said it was very common, I assumed he had just installed the PFC, and in the beginning just about everyone has the idle surging.

rynberg

When I first installed the PFC, I rushed through the learning process and I had the idle bouncing crap. I reset the PFC and properly went through the learning process and it never did it again. Other people I know have experienced the same thing.

But then again, some people's A/C works 100% normal while other cars have issues. So, I'll give you the possibility that for certain cars, the damn PFC is going to bounce your idle....

FDNewbie

iTrader: (10)

Rynberg, I know I should plug the hose, but I didn't realize I would need to when I first put on the greddy elbow

Then, believe it or not, I spent almost a WEEK searching for those rubber hose plugs everyone was talking about. The local car shops have the HELP! products line, but def. no hose plugs. Looked all over. So I finally went to Home Depot yesterday, and got this plastic plug that's made to plug piping lol. It's 3/4", so it'll fit, and I'mma just put a hose clamp on it. That should hold at least until I get a chance to put on some block off plates and eliminate the AWS and airpump in a week or two.

911GT2, I've actually had my PFC for a while...and I had it "self-learn." Didn't do much. I get this searching mode even when the car's real warm and I've been runnin hard for quite a while. And the car even just stalls out on me every now and then for no reason. Stupid PFC lol

I read a bunch of the posts about the PFC and idle issues, and I wanna reset it, give it a shot at relearning the idle, and play w/ the idle screws if need be. Only prob is I'm kinda retarded when it comes to actually using the PFC (ie putting in maps), so resetting the PFC would leave me helpless w/ only base maps

911GT2

So whats the actual question here again? Were you asking if it's normal for vacuum to bounce with idle surging? Or looking for info on how to correct the PFC idle surging issue? I got lost somewhere amidst the two.

FDNewbie

iTrader: (10)

My bad if I didnt clarify it. My main focus was if it's normal for the vaccuum to bounce while the idle bounces.

The rest was just me bitching about how I've read great ways to help fix the idle issue, but I need to find someone willing to remap my PFC for me.

Oh and 911GT2, I PMed ya about a diff issue we had talked about before.

911GT2

Well then, yes. It's normal.