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Old 04-06-19, 06:06 PM   #1
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Default Peugeot planet live parameters

Hi,

Just working my way round PP. And seeing readings for the same thing: actual, reference and repeat. Or words to those effect.

What do these mean please?

Thanks

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Old 04-06-19, 06:19 PM   #2
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Reference is what the ECU wants the value to be and actual is what it actually is.
E.g., the ECU thinks that a certain volume of air should be coming in through the MAF and it compares this to the actual value and then decides if it wants to do something such as move the air doser or recycle more or less exhaust.

Repeat applies to actuators that move. For example the ECU requests the EGR value to open and the EGR reports it's actual position back to the ECU and if they're different then the ECU might decide to sent Aunty Pollution to visit you.
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Old 04-06-19, 06:22 PM   #3
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Originally Posted by rwb View Post
Reference is what the ECU wants the value to be and actual is what it actually is.

E.g., the ECU thinks that a certain volume of air should be coming in through the MAF and it compares this to the actual value and then decides if it wants to do something such as move the air doser or recycle more or less exhaust.



Repeat applies to actuators that move. For example the ECU requests the EGR value to open and the EGR reports it's actual position back to the ECU and if they're different then the ECU might decide to sent Aunty Pollution to visit you.
Thanks for that. Makes sense.

Got a permanent MAF low pressure felt and an intermittent low pressure turbo fault so looking at values to see what's up...

Cheers

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Old 04-06-19, 09:55 PM   #4
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My money's on the MAF being the cause, which sometimes throws up boost faults. Clear the faults, unplug the MAF and go for a drive. It should drive a bit better.
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Old 04-06-19, 09:57 PM   #5
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My money's on the MAF being the cause, which sometimes throws up boost faults. Clear the faults, unplug the MAF and go for a drive. It should drive a bit better.
I'll do that in the morning.

Not sure if a result of the MAF being faulty or not but the turbo is playing up. Late to boost and the boost seems to come in and out when it's on the boost. Strange! I'm guessing more issues than one

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Old 05-06-19, 09:04 AM   #6
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Disconnected MAF sensor and drove home from work like that. All symptoms gone. No layers boost. No hesitancy whilst on the boost! So it's the MAF that's a goner

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Old 05-06-19, 09:33 AM   #7
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Good to hear. Don't be tempted to get a cheap replacement MAF, they often don't last long. I got mine from eurocarcare.net for about £60. Had exactly the same symptoms as you. Put the new one on and it like a new car! Increase in fuel economy of about 10MPG too.
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Old 05-06-19, 09:57 AM   #8
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Looking forward to getting them 10mpgs back! Cherrs!

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