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savages4
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« Reply #30 on: June 25, 2012, 03:48:19 PM »
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I haven't pressure tested, I was going to drive up and have my mechanic do what he calls a "smoke" test. My turbos have 5,000 miles on them and have felt this way since I got them, I just never have gotten around to logging...
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s5fourdoor
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« Reply #31 on: June 25, 2012, 03:48:47 PM »
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are you on the stock injectors and airbox? if so i'd reflash the bone stock ecu and take nyet's advice. change one thing at a time.
if the car has the virgin m-box on there and you are throwing these codes, the evidence will be in your logs. we need to be scientific about diagnosing your car's issue.
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savages4
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« Reply #32 on: June 25, 2012, 03:53:35 PM »
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Read above I'm running even less aggressive now then a stock m-box and still getting deviation. I don't know how much more I can turn the ldrxn down without it being a complete dog to drive down low.
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nyet
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« Reply #33 on: June 25, 2012, 04:19:57 PM »
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To be clear: don't worry about how much of a dog your car is right now.
right now you should be diagnosing the spool issue....
putting the ecu closer to stock gets you closer to that goal.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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savages4
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« Reply #34 on: June 25, 2012, 05:06:04 PM »
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Well I have the ldrxn values 40 less then stock and im still deviating so how should I be diagnosing this better?
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savages4
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« Reply #35 on: June 25, 2012, 05:22:51 PM »
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I'm throwing a 1557 code even with these values for ldrxn: Something is seriously messed up
82.62 83.32 85.27 88.08 90.73 96.14 103.27 117.94 135.26 155.23 169.78 169.81 169.46 166.67 161.46 151.95
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nyet
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« Reply #36 on: June 25, 2012, 05:27:37 PM »
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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savages4
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« Reply #37 on: June 25, 2012, 06:14:15 PM »
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I'm getting it smoke tested tomorrow.. never ending trying to get this car to run right.
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nyet
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« Reply #38 on: June 25, 2012, 06:20:51 PM »
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shrug. all part of the game. remember though, never try to fix hardware problems in the tune. If your tune isn't working MAKE SURE the car is physically 100%; don't even bother tuning until you get those issues ironed out right.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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savages4
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« Reply #39 on: June 25, 2012, 06:32:17 PM »
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I think my car is 100% i've done alot of work in the last 6 months.. after doing some reading i'm thinking defective N75 valve, I'm finding it hard to believe my car has a boost leak.
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« Last Edit: June 26, 2012, 01:31:50 PM by savages4 »
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littco
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« Reply #40 on: June 26, 2012, 01:33:04 AM »
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Are you sure the wastegates are actually fully closed? I had something similar last year on a car, turned out the wastegate wasn't fully shut and slightly opened even when engine off as a result it never boosted properly. If I asked for 18psi it gave 14psi if I asked for 14 it gave 10 etc. even with n75 do @ 95% it never meet requested, I thought boost leak but actually the wastegate had come loose slightly causing the flap to be open. May have nothing to do with yours but worth a look.
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prj
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« Reply #41 on: June 26, 2012, 04:43:39 AM »
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I think my car is 100% either that or the $8,000 i've put into it in the last 6 months wasn't spent right... after doing some reading i'm thinking defective N75 valve, I'm finding it hard to believe my car has a boost leak.
Finding it hard to believe that you have a boost leak??? Boost leaks account for roughly 9 out of 10 problems on turbocharged cars. I boost leak test EVERY SINGLE car before I tune them, and so far only about 2 out of 50 on average have been leak free. And that's when the owners had the pressure test done themselves. If your turbos don't spool and you get P1557, then 99.9% you have a boost leak. |
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« Last Edit: June 26, 2012, 04:45:22 AM by prj »
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nyet
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« Reply #42 on: June 26, 2012, 08:42:52 AM »
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Finding it hard to believe that you have a boost leak??? Boost leaks account for roughly 9 out of 10 problems on turbocharged cars.
I boost leak test EVERY SINGLE car before I tune them, and so far only about 2 out of 50 on average have been leak free. And that's when the owners had the pressure test done themselves.
Agreed 100% The amount of money you spent has nothing to do with the odds of a boost leak. It is a reality of all FI designs. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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savages4
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« Reply #43 on: June 26, 2012, 09:10:28 AM »
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My turbos do spool, just not past 10 psi (cracking pressure). Anyways, I'm going to check over everything for boost leaks, and go from there, if I can't find them visually I'll have to go get a smoke test done.
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nyet
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« Reply #44 on: June 26, 2012, 09:17:41 AM »
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I don't know of anybody who has found a boost leak visually, except for maybe a torn throttle body boot.
PRESSURE TEST already. If you are self tuning your car, you absolutely should have the equipment and ability to do this yourself REGARDLESS.
Also, don't forget to make sure your wastegates seal up properly
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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