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I don't post too much, so, thank you for taking the time to read this and hopefully come back with a response.
First off, I have a 2012 Evo X GSR. I bought it brand new and am the only owner.
Mod list for just engine:
MAPerformance Tubular Turbo Manifold (heat wrapped)
MAPerformance 3" Downpipe with Open Dump tube
Custom 3" straight exhaust with two 4" tips
ETS Upper Intercooler Piping
ETS 4" Intercooler
ETS Intake
Synapse Blow Off Valve
Perrin Electronic Boost Controller
DeatschWerks DW65C 265lph in-tank Fuel Pump
Tuned by Kasey Harris in North Carolina on high boost the car made
375.32hp/412.58ft/lbs
For every day driving we left the tune around
364.10hp/351.54ft/lbs
Both on 93 octane with stock injectors and stock clutch
So, heres the scenario...exiting the highway about a month ago I downshift and give it some gas and the car just bogs down and starts cutting fuel. If I hit any boost or even give it 50% throttle it limps. I get back to the shop and see that my MAP turbo manifold has cracked in several places.
I take it off and get it rewelded. I was told the heat wrap is more than likely the culprit in regards to the cracking. I end up getting a heat blanket for the rewelded manifold. I reinstall everything and the car is still giving me issues.
I scan the car with the Launch CRP123 and get P0171 and P0141. I replaced my o2 sensor just for good measure and clean the MAF and MAP. Then, all of a sudden yesterday morning I find a P0219 and P0171 sitting on the scantool that wasn't there before. I check and don't see any misfiring issues or anything else that looks out of the norm. I compression tested the car and yielded results of 140/140/135/135 and a vacuum pressure test sat right around 17 in. Hg. The car is still having the same symptoms, at first start the idle is around 1200, once it warms up it drops to around 900rpms, which is normal. My vacuum gauge in the car jumps between 18-20psi at idle, like it would before the issues. If I try and drive it with about 25% throttle it seems to run fine/normal but the minute I give it about 50% throttle or hit any kind of boost, the car bogs out like it's cutting fuel. Edit - I am also now getting the infamous starter noise when I crank it up...not sure if it could be adding to the issues or not...
I guess my main thought at this point is, could we have missed a crack in the manifold? If so, could that be causing the P0171 code and for the car to be going into limp mode or cutting fuel? Could the turbo have blown? Could the crack in the manifold have caused other issues that I am overlooking?
I still have my stock manifold and an extra stock turbo. I can put either on and see if it helps but was wondering if there were any other things I should test before having to take the manifold off, yet again lol.
Any help would be greatly appreciated!!
Last edited by akaOtherWise; May 10, 2016 at 06:51 AM.
with cracks that bad theres no way your turbo is working like it should. your tune may be calling for 7psi at 2300 rpm so add X amount of fuel but the problem is your turbo is not winding up correctly thus throwing all the expected parameters off. car sees issues throws itself into limp mode. i would put the stock manifold back on ASAP to avoid other issues. all other things aside spewing white hot exhaust gases into your engine bay is bad news
The manifold has been rewelded and reinstalled...yet, it's still giving me issues. I am going to swap back to the stock one tomorrow. I am building a boost leak tester, also. I'll do both tomorrow and see what happens.
i would do the boost leak test like you mentioned. There is a SMALL chance when the crack in your manifold formed it splintered metal and a piece could have damaged your turbo. if your boost leak test does not turn anything up than the next thing would be to slap that space back on. do you have an AFR gauge?
So, I just got back from buying everything to make my own boost leak tester. So, I scanned the ecu again just for good measure before getting started and now I'm getting P0102 Mass or Volume Air Flow A Circuit Low and P0113 Intake Air Temp Sensor 1 Circuit High as permanent codes to go with the P0171 I have been getting......
P0171 is lean. More air than the MAF is reading or less fuel than what the fuel map is set for.
P0102 MAF circuit low. I am gonna go with the MAF is reading incorrectly due to inaccurate temp readings (see next code)
P0113 Intake air temp circuit high. On the manifold I think.
So, you have access to a launch scanner. pull up live data engine off cold and see if the temp readings are plausible. Look to see if ambient temp and intake/manifold temp are the same. Air temp is very important. If the air is colder than it thinks it is (refer to P0113) It will not have enough fuel for cold enrichment. 60F actual vs the 140F (or -40 depending on a short or open) air that reads when a typical thermistor fails is more than enough for fuel headaches.
If no scanner data, an ohmmeter is next. Unplug the temp sensor on the intake manifold and check resistance across the 2 pins on the sensor. a reading of 0 is bad and a reading of open/OL is bad.
