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Author Topic: vw AWP 1.8t ko4xl power cut issue  (Read 28015 times)
nubcake
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« Reply #45 on: July 24, 2016, 03:11:26 PM »

Also, one of the reasons your engine didn't blow up yet - this underscaled MAF actually makes your AFRs somewhat decent. If you fix the MAF without fixing the overboost first - you run a risk of leaning it out and melting or breaking something.
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vwmaniac
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« Reply #46 on: July 24, 2016, 03:13:36 PM »

so the stock 1.8t maf on a ko4 will not max out?
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nyet
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« Reply #47 on: July 24, 2016, 03:16:20 PM »

so the stock 1.8t maf on a ko4 will not max out?

Maybe, but that isn't the problem. You don't seem to understand what we're saying Sad
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vwmaniac
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« Reply #48 on: July 24, 2016, 03:16:47 PM »

Also, one of the reasons your engine didn't blow up yet - this underscaled MAF actually makes your AFRs somewhat decent. If you fix the MAF without fixing the overboost first - you run a risk of leaning it out and melting or breaking something.
so the 52lb ev14 injectors have nothing to do with my fueling being good?
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nyet
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« Reply #49 on: July 24, 2016, 03:17:31 PM »

so the 52lb ev14 injectors have nothing to do with my fueling being good?

If your fueling is right (apparently by blind luck, it wasn't thanks to anything you did right), but MAF is underscaled, likely you have a leak of some kind or your krkte is wrong. You're damned lucky you have a WB car.
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vwmaniac
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« Reply #50 on: July 24, 2016, 03:19:25 PM »

Maybe, but that isn't the problem. You don't seem to understand what we're saying Sad

so i need to use spread sheet program to scale it to match the file itself and that will bring my requested boost closer to actual?
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nyet
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« Reply #51 on: July 24, 2016, 03:21:11 PM »


so i need to use spread sheet program to scale it to match the file itself and that will bring my requested boost closer to actual?

Not even close. It is entirely unrelated to your boost issues. That is a completely separate problem.

At this point you really need to step back from what you are doing and try to understand how the ECU works Sad

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nubcake
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« Reply #52 on: July 24, 2016, 03:22:39 PM »

Firstly, get the boost under control. And keep watching AFRs while at it.
When you manage to achieve that - you can proceed to other issues at hand.

Cut the bunch out of KFLDIMX at 3500+ RPM, this should help lower it somewhat.
Review the wiki.
« Last Edit: July 24, 2016, 03:24:21 PM by nubcake » Logged
nyet
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« Reply #53 on: July 24, 2016, 03:25:57 PM »

Firstly, get the boost under control. And keep watching AFRs while at it.
When you manage to achieve that - you can proceed to other issues at hand.

Agreed. Boost first (get it sane - get it consistently below ps_w max), then fix MAF/fueling issues, then revisit boost, then revisit fuel, then timing.
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vwmaniac
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« Reply #54 on: July 24, 2016, 04:52:38 PM »

Agreed. Boost first (get it sane - get it consistently below ps_w max), then fix MAF/fueling issues, then revisit boost, then revisit fuel, then timing.
Would it be better to start with a 225 file and matching maf?
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nyet
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« Reply #55 on: July 24, 2016, 05:03:00 PM »

Does your KRKTE match theoretical?
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vwmaniac
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« Reply #56 on: July 24, 2016, 05:09:10 PM »

Does your KRKTE match theoretical?
I don't believe it does its very slightly lower than stock I adjusted latency and checked fuel trim and idle was within 5% and part throttle was less than 1% so more than likely krkte off I'm away from my computer right now but I'll get the exact number and factor I used
« Last Edit: July 24, 2016, 05:12:06 PM by vwmaniac » Logged
nyet
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« Reply #57 on: July 24, 2016, 05:45:46 PM »

Why would you use stock KRKTE if you aren't using stock injectors?
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vwmaniac
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« Reply #58 on: July 24, 2016, 07:06:24 PM »

Why would you use stock KRKTE if you aren't using stock injectors?
ok so im abandoning the 06a906032dl file and using the tt file 8no906018bb
im gonna calibrate the injectors till fuel trims are good. i have a question, if i wanted to use the newer style vr6 sensor will i swap the maps over for that or is it not possible with out scaling (maf housings are the same size iirc)? reason i ask is that im not sure i have a good old style sensor
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nyet
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« Reply #59 on: July 24, 2016, 08:29:56 PM »

ok so im abandoning the 06a906032dl file and using the tt file 8no906018bb

Why would that fix KRKTE if you set it wrong for your injectors?

Quote
im gonna calibrate the injectors till fuel trims are good.

This can't be done w/o getting your MAF scaling right as well. In general, you start with KRKTE at theoretical, TVUB from injector specs, and scale the MAF until your trims are right (assuming you have no idea what your MAF curve is.)

If you do know what the MAF scaling is, and you leave it at theoretical, and your trims are WRONG there is something wrong with your assumptions.

Quote
i have a question, if i wanted to use the newer style vr6 sensor will i swap the maps over for that or is it not possible with out scaling (maf housings are the same size iirc)? reason i ask is that im not sure i have a good old style sensor

Find out FOR SURE what your MAF diameter is compared to the file you intend to use. Don't guess.

Same with the MAF sensor.

I'm really puzzled as to your approach here. None of what you posted really makes any sense to me.
« Last Edit: July 24, 2016, 08:31:59 PM by nyet » Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please 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 experience.
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