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Author Topic: Massive timing retardations on stock 1.8T BEX.  (Read 3125 times)
razor1199
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« on: June 16, 2021, 01:00:32 PM »

Hello there,
I'm struggling with 1.8T BEX, car came to me with too low boost, I've checked everything, seemed ok, I also noticed too much timing retardations on all cylinders, we decided to remove cat, for my suprise almost nothing changed , about 50mbar gain of boost, I found that WG actuator is opening too early, I have adjust it, but adjustment range is over, I know WG actuator needs to be changed, anyway I have my boost, let's say, "back" to stock again, but there is about 10KW retardations Sad(
Spark plugs are brand new.
I have done some logs in ME7Logger, what I see there is IDC high, propably bad fuel pump? Or bad injectors? Tommorow I will do a measure of fuel pressure. Anyway retardations are high at mid range RPM, I don't exactly know what to next, excluding checking fuel pressure.

Here are 2 logs, first with MAF plugged, second with MAF unplugged. Car is totally stock, just catless.

Could you help me? Please Smiley
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BlackT
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« Reply #1 on: June 16, 2021, 01:43:28 PM »

How much octane?
When I have BEX full stock, all okay. On bad fuel in summer days I was geting 6 KR on all cil
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razor1199
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« Reply #2 on: June 16, 2021, 02:22:35 PM »

I belive it's 95 octane (EU), I could take it if it would be 6KW, but 10? I feel it on the way, It's nearly knocking. Also I'm run out of injectors without any modification. Today was also only 26C degree outside Sad
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BlackT
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« Reply #3 on: June 17, 2021, 12:11:58 AM »

You are not running out of injectors. Fuel sistem is good, You have AFR lower than 10.8

I was not able to get rid of knock before putting 100 octane + 15 etanol.  It was not caused with any mehanical problem, at least i could not find any (year after I disassembled whole engine to change rods)


http://nefariousmotorsports.com/forum/index.php?topic=16584.0
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Blazius
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« Reply #4 on: June 17, 2021, 12:53:25 AM »

Run toulene concentration.
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razor1199
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« Reply #5 on: June 17, 2021, 01:12:43 AM »

You are not running out of injectors. Fuel sistem is good, You have AFR lower than 10.8

I was not able to get rid of knock before putting 100 octane + 15 etanol.  It was not caused with any mehanical problem, at least i could not find any (year after I disassembled whole engine to change rods)


http://nefariousmotorsports.com/forum/index.php?topic=16584.0

Did the rods help?  Cheesy
I saw there is 100% IDC at end of measurements that's why I thought I'm out of injectors.

Run toulene concentration.

Do you mean I should add toulen to the tank ?
« Last Edit: June 17, 2021, 01:20:25 AM by razor1199 » Logged
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