07-10-2017, 02:08 PM | #183 | |
pessimistic skeptic
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In that case, isn't it better to use a vacuum check valve on the intake manifold exit? Don't you think there can be pressure loss at the catch can and two pieces of hose connections before the PCV valve. |
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07-10-2017, 02:12 PM | #184 | |
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I would suggest deleting the PCV valve entirely and running a barbed fitting in place. Not sure when I posted that, but I soon found out that STI valve was a piece of shit too.
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07-10-2017, 02:14 PM | #185 | |
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07-10-2017, 04:05 PM | #186 |
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I also ran a VTA catch can for years, using the top manifold PCV port (the one Kris is using for his boost gauge) as boost signal to a vacuum manifold for gauge and BOV signals. Setting up the PCV that way is OK to keep the stock PCV as it won't see boost.
Also the Fuel Pump should not be putting any different fuel pressure than stock. The FBM 485 pump kit just replaces the fuel pump, it still uses the stock fuel regulator inside the tank pump canister.
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07-10-2017, 07:01 PM | #187 |
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that will work fine since you don't have a return system. go out for a drive and watch when you are at idle and wot make sure it stays around 56 pounds
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07-11-2017, 03:20 PM | #188 |
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looking to try and borrow a new MAF sensor and see also. don't know if this would be related to my problem, but just want to scratch everything off my list of possibilities
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07-11-2017, 08:06 PM | #189 |
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So got a MAF sensor to borrow out a car belonging to a friend.
It did NOT make one difference. so I decided just for the hell of it I'll unplug the MAF sensor and see what happens, it started up perfectly and idled perfectly in the "warm up" map at around 1500rpm, and then gradually came back down to around 900-1000 With the sensor plugged In I noticed that the wide band reads around ~17.~ which I think is why it won't idle because it seems to be starving for fuel, when I unplug the MAF sensor the car fires up and idles with the wide band reading ~11.6~12.1~
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07-11-2017, 11:55 PM | #190 | |
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08-22-2017, 10:56 AM | #191 |
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Hey guys,
so little update, been out of it for a while. I sent out my GDI injectors to be cleaned and tested at South Bay Injectors, also to have the seals replaced, turned out one of my GDI injectors were "not working the way it should be". so I went ahead and bought a brand new one and installed my 3 refurbished injectors and one new injector. my vacuum is reading quite a bit better (.37-.40 bar at idle), guess the seals did need changing. BUT, I STILL HAVE THE COLD START/NOT WANTING TO IDLE WHEN IN COLD START MAP PROBLEM. it would sometimes try to idle around 500rpm and then every now and then the rpms would jump up to 1700ish rpm and then back down to 500rpms and eventually stalling. once the car comes out of the cold start map, the car would idle perfectly. starts perfectly when hot also. I also notice that while free revving, the engine has a lean spot and a misfire around 2000-2500ish rpm. really getting frustrated now, haven't been able to enjoy my car for 8 long ass months now
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08-22-2017, 11:00 AM | #192 |
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Do you get any codes? I upgraded my injectors last week and when I tried to start it, it kept stalling and when it fired up it kept revving from 500-1500 like you mentioned. It threw a code, P062D, my direct Injector ECU wasn't grounding through the factory bracket for some reason. I wired it to one of the the ground bolts next to the battery and it started fine. I would check your Direct Injector ECU as it might be the culprit. It might be grounded but some wires or plugs might be loose.
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08-22-2017, 11:25 AM | #193 | |
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NO, I do not get any codes what so ever. I've thought about the direct injector ecu also, but I've back checked and triple checked and made sure to inspect all grounding points. U think I should try running a ground wire from the ecu bracket to the battery to try for the sake of it ? Just not sure because I never got this kind of code
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08-22-2017, 11:29 AM | #194 | |
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08-22-2017, 11:47 AM | #195 | |
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so you do not have your Direct Injector Ecu mounted into the stock location anymore? or am I just seeing your picture from a weird angle? were your idle symptoms only when in the cold start map also?
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08-22-2017, 11:49 AM | #196 | |
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