So ladies and gents , give it wot and it boosts as it should , back off the throttle and wot again and no boost .
Swtich off and start again and its fine again until i let off the throttle and go to wot and no boost ?
I have scanned the car today and no errors are present , any ideas thanks .
No boost .
Re: No boost .
If there are no codes then it sounds like a dumb component getting stuck / failing. I'd probably start by changing the N75 and DVs. Good preventive maintenance that anyway.
/actually I'd start by logging the boost values when the problem occurs.
/actually I'd start by logging the boost values when the problem occurs.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: No boost .
Thanks for the quick reply , i have changed the DVs and its the same , i have a spare n75 so i will try that next cheers .
Re: No boost .
If that doesn't work then you need to see whether the ECU is requesting boost or not.
Check the condition of your vac hoses while you're in there.
Check the condition of your vac hoses while you're in there.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: No boost .
Cheers yes i will check vac lines although the ones i can see have been replaced with quality silicone hoses .
I will start again tomorrow fingers crossed .
I will start again tomorrow fingers crossed .
Re: No boost .
Waste gate or similar stuck open? I'd hope that would raise a code though.
Re: No boost .
Sounds like the ECU is putting the car into soft limp due to an overboost condition.
Has it been mapped?
Has it been mapped?
Recycling dinosaurs for fun
Re: No boost .
^^That's what I thought initially, but there should be a DTC if that's the case.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: No boost .
True, unless it's been mapped by some bampot who's fudged more than they should!
Recycling dinosaurs for fun
Re: No boost .
We'll probably never know...
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: No boost .
Okay so i didnt get round to looking last weekend due to work and <beep> weather .
I have no history regarding a map , so am still going to go the n75 route next and see what happens .
Cheers .
I have no history regarding a map , so am still going to go the n75 route next and see what happens .
Cheers .
Re: No boost .
Right i finally got a bit of time to get the airbox mafs off and noticed the short vac line to the fuel press reg was split in two .
So i replaced this but also noted another line sort of inbetween the dv,s and then it disapears down by the right hand headlight ? This line is spurred off a larger diameter hose under the right dv , i cant seem to find where it goes .
Thanks for the help so far .
So i replaced this but also noted another line sort of inbetween the dv,s and then it disapears down by the right hand headlight ? This line is spurred off a larger diameter hose under the right dv , i cant seem to find where it goes .
Thanks for the help so far .
Re: No boost .
Sounds like it's going to the N80 Evap valve.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: No boost .
Could this also be part of the problem ? What does the N80 valve do .
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