P0174 and P0171 Codes?
#16
07-26-2010 | 01:38 PM
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#17
07-26-2010 | 02:21 PM
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Interesting point about secondary air injection pump. Will it sound like the PS pump?
Not yet , something NA for sure this time. Maybe a Gt3...going to take it easy for a while and then will see.
Not yet , something NA for sure this time. Maybe a Gt3...going to take it easy for a while and then will see.
#18
07-26-2010 | 02:26 PM
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Boost leak almost for sure. The computer is running out of leeway to adjust discrepancy between meassured air and what it sees as normal fuel.
had the same exact codes after I redid my IC, Turbos, Y pipe (obviously lots of places to re-check). Once it was boost tested, the codes were gone for good.
had the same exact codes after I redid my IC, Turbos, Y pipe (obviously lots of places to re-check). Once it was boost tested, the codes were gone for good.
. Good luck V - hope you find the right car for you.
#20
07-26-2010 | 02:34 PM
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Boost leak almost for sure. The computer is running out of leeway to adjust discrepancy between meassured air and what it sees as normal fuel.
had the same exact codes after I redid my IC, Turbos, Y pipe (obviously lots of places to re-check). Once it was boost tested, the codes were gone for good.
had the same exact codes after I redid my IC, Turbos, Y pipe (obviously lots of places to re-check). Once it was boost tested, the codes were gone for good.
#22
07-26-2010 | 03:39 PM
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Hey Vinod, check all your vacuum lines...pulled my hair out on this one until I boost leak tested it....doesn't take much of a leak to **** this ECU off...
https://www.6speedonline.com/forums/...en-solved.html
https://www.6speedonline.com/forums/...en-solved.html
#23
07-26-2010 | 04:57 PM
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With NA cars it is usually a vacuum/intake leak.
A
#24
07-26-2010 | 05:00 PM
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if you have a leak, what happens it that the feul calc based on the MAF and the calc based ont he O2 sensors will be off- the DME adjusts the short term fuel trim to compensate...as this continues the long term fuel trim is periodically incremented so that after a while (say 50 miles) the long term fuel trim is finally out of spec and you trip codes.
With NA cars it is usually a vacuum/intake leak.
A
With NA cars it is usually a vacuum/intake leak.
A
...and for the most part our cars are NA, until we spool'em up...
#25
07-26-2010 | 07:45 PM
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The same principle applies- air leaking OUT after the maf due to pressure will do the same thing....just a fuel trim error in the other direction
Last edited by ard; 07-26-2010 at 07:54 PM.
#26
07-26-2010 | 10:45 PM
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Hey Vinod, check all your vacuum lines...pulled my hair out on this one until I boost leak tested it....doesn't take much of a leak to **** this ECU off...
https://www.6speedonline.com/forums/...en-solved.html
https://www.6speedonline.com/forums/...en-solved.html
I guess the next step is boost leak , smoke test the car...just hoping its a hose that doesn't require engine out.
#27
07-26-2010 | 10:47 PM
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if you have a leak, what happens it that the feul calc based on the MAF and the calc based ont he O2 sensors will be off- the DME adjusts the short term fuel trim to compensate...as this continues the long term fuel trim is periodically incremented so that after a while (say 50 miles) the long term fuel trim is finally out of spec and you trip codes.
With NA cars it is usually a vacuum/intake leak.
A
With NA cars it is usually a vacuum/intake leak.
A
#28
07-27-2010 | 12:07 AM
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Yes because your wastegates are limiting your boost to 1.2! If the leak is small or on inlet side of turbos. I feel its on the maf to turbo side of things, best bet is to smoke it.........
#30
07-27-2010 | 07:34 AM
Mike. Thanks. This is the same exact code my car threw when i was idling the car today and checking things out. I cleared it and then it idled high and low again and threw a bank 1 misfire codes. Cleared that and then it went away..
I guess the next step is boost leak , smoke test the car...just hoping its a hose that doesn't require engine out.
I guess the next step is boost leak , smoke test the car...just hoping its a hose that doesn't require engine out.