Aight I have mods in sig. I have had this running rich problem and high idle ever since my turbo install. My car starts up and idles bouncing from 2-3 grand and then when warmed up bounces from 1500-2000. The things I have already done:

Pressure test - found leaks and fixed
Checked out o2 sensor resistence and its bad still waiting on my new one to come in
Did the mode II check and the check engine light comes on and stays on
Checked maf voltage at ground is 6 mv
Checked and set timing to 15 degrees

This weekend I installed the nismo fpr along with the apexi avc-r. Before the nismo fpr I had the gtir one installed and my fp was 41-42 at idle with line on and 48 with it off. I put my stock one in and same thing. When I installed the nismo one now my fp goes no lower than 50 with the bolt out as far as will go without stalling. I do belive the o2 sensor has something to do with this but could anything else be a problem or is there anything else I need to check?

where did you cheak for the vacum leak, cause thats what it sounds like is happining here.

Everywhere, sprayed water/soap solution on all intercooler pipes I also listen very closely and can no longer hear any hissing

did you check the throttle body and intake manifold. get some brakeclean and spray it around the throttle body and intake manifold if the rpms raise then thats where your problem is.

No I havent done that technique yet, I'll have to try it this weekend. And what is up with the nismo fpr? I thought that if you turned the bolt all the way in it would lower fuel pressure and if you turn it all the way out it would increase it? *** my friend was the one adjusting it while I was in the car and the said when he started turning it in it went to 100 psi but then with it all the way out it didn't go no lower than like 50-60. Also now that I think about it when I added my turbo at the same time I added that outlaw engineering gasket and spacer kit. I wonder if that has anything to do with it?

when i was tuning my buddies grand national his fpr worked the same way, im pritty sure that the when the screw is all the way down it runs more pressure. but then again he didnt have a NISMO, obviously. call jim wolf tech they will know.
# is (619) 442-0680

Yea I called Ben up from jwt and he said that when its all the way down its more pressure, so you and I were right. He also suggested getting some starting fluid and spraying lightly in areas that may be leaking. I think that if there is any leak it could have been related to be installing that outlaw engineering gasket kit.

yea starting fluid and brake clean are baisicly the same thing, or you could use carb cleaner also. but yea spray lightly, im thinking its around the intake manifold somewhere. try it out and lmk what happens.

Aight installed boost gauge and when I first started her up was at like 18-19 inches Hg as my car was bouncing from 2-3 grand. Then shut it off and took out my nismo fpr and reinstalled my gti-r fpr and no change. Unplugged my inop o2 sensor as Ben from jwt told me I could do this to keep it out of closed loop I think. No change. I then hook everything up as normal for my vacuum lines leaving out the pressure sensor and boost solenoid for the apexi avcr. No change. I then get to thinking and unsolder the injector wire source for the apexi avcr thinking that it might being messing with the resistor blocks or something and NO CHANGE. After all the starting and shutting off the car finally warmed up and when warmed up will bounce from 1700-2300 and has 15-16 inches Hg of vacuum. Also I did spray all over the TB, Intake manifold and plenum and no change in idle. Oh yea fuel pressure is now 90 with or without the vacuum line hooked up. What do I do now I think I need to have a fellow forum member that is in my area and is turboed come out and help me. I'll pay for gas and lunch.....

Oh yea fuel pressure is now 90 with or without the vacuum line hooked up.


90?!?!??!?!??!! crap, that's almost 3 times what it should be at idle! No wonder the car doesn't want to run.

Why did you take off the Nismo FPR? It's adjustable.

There is no way you adjusted your timing correctly when you can't even get it to idle. High bouncing idle sounds like bad vac leak... just like everybody else has said. And something is seriously wrong with your fuel system.

The fuel pressure changed afer installing the apexi avc-r? With the nismo fpr the fuel pressure was at 80 before stalling, thats the lowest I could get it. So I swapped it out to see if the gti-r one changed it and it went up. But like I said it was 41-42 with gti-r fpr before install of nismo fpr and apexi avc-r. Well I set my timing to 15 degrees with timing light. I have the sears professional timing light and you can set it to either the 0 degrees or whatever degree your trying to set it at up to like 60. I set it to both and 15 and 0 and it was dead on. I forget what my car was idling at, at the time but probably at like 2000 or something. So any suggestions?????

The fuel pressure changed afer installing the apexi avc-r? With the nismo fpr the fuel pressure was at 80 before stalling, thats the lowest I could get it. So I swapped it out to see if the gti-r one changed it and it went up. But like I said it was 41-42 with gti-r fpr before install of nismo fpr and apexi avc-r. Well I set my timing to 15 degrees with timing light. I have the sears professional timing light and you can set it to either the 0 degrees or whatever degree your trying to set it at up to like 60. I set it to both and 15 and 0 and it was dead on. I forget what my car was idling at, at the time but probably at like 2000 or something. So any suggestions?????

Did you reroute any vacuum line for the avc-r... or even for the fpr? That is where I would start looking. You obviously changed something then.

And like I said... If you aren't idling at the correct RPM it doesn't matter what timing light or anything... you didn't do it right. To time the car it has to be idling correctly first... Timing gets added with rpm. So there is no way your timing should be right now if you timed it at 2000 rpm.

Oh aight I see what your saying. Yea I had to add a boost solenoid in between my wastgate and intercooler pipe, and a pressure sensor in between my fpr and tb. I rerouted those so there not in the picture and No Change. I unsoldered the wire for the injector source off my #1 Injector wire thinking that had something to do with my fp and No Change. The only other thing I can think about is my TPS. You have to solder a wire into your white wire at the ECU for the throttle source maybe that is affecting my FP? Other than that I have no clue what to do now. I'll go out today and see what my tps voltage is and then from there I'm all out of suggestions?

All of the stuff you are doing is not getting you anywhere. Your all over the place on this. First and foremost you mentioned outlaw spacers. I bet you that is the source of the leak! I honestly would check the intake manifold connections with soapy solution and check thoroughly for leaks. High bouncing idle sounds like a bad leak. Also have you checked the throttle cable? If you put the Outlaw spacer on the TB i moves the TB over and puts tension on the throttle cable.

Here's a list to trouble shoot, do it in this order.

1. Check throttle cable (remove it from the TB and let the car idle).
2. Check the IM connections thoroughly for leaks, this CANNOT be done visually.
3. If you did not THOROUGHLY clean all surfaces when you did the gasket install you need to take it apart and re-do it if you cannot solve this issue.
4. Do not mess with timing until you get the idle issue under control. Once you find the source you will have to adjust timing and idle!

Yes I have checked the throttle cable, but I will take it off again and see what happens. I'm too starting to think that those spacers are leaking somewhere. I did spray starting fluid all over and nothing. I will try water/soap solution, so I should do this while its running or do a pressure test or both? I did throughly and I mean throughly clean the intake manifold, plenum and TB when I installed them. I also checked my tps today and at idle .5 and 4.22 at WOT. So no change there. I still don't understand how I install this apexi avc-r and my fuel pressure increases 50 PSI?????

TTT^^^^

Any more suggestions?????

So you went through wes's list and didn't find anything? I find that hard to believe.

yea same here.........go threw it again