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Discussion Starter · #1 ·
Hi guys i picked up an a4 there yesterday for really cheep but the turbo is cutting out at 3.5rpm in 5th u can really feel the loosing of the turbo almost just a stal in the engine.

any ideas,? could this be just a boost leak?
 

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Are you isolating the problem to fifth gear? Does it not behave the same in each gear at the same revs? Would seem odd to only happen in fifth.although...you are doing bout 100mph at that point, a strange speed limiter?
Does not sound like a boost leak as you would hear and feel in in all gears.
Scan for faults.
 

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Robbie
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I beg to differ lads, u would not hear a boost unless it was severe, the reason the OP might only notice this in higher gears is because there is hIgher load and slower spool so problems are noticed more. It could be a few things, boost leak, faulty actuator, N75 etc..
Start by getting it scanned
 

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Discussion Starter · #7 ·
it could just be in my mind. the last car i had was a 190bhp diesel bmw. witch was boosting at 1.45 bar so it pulled right threw till 5. i have to realize it is only a 90brake. but shurly they do better than that??
 

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Discussion Starter · #8 ·
ok still having trouble.

i replaced every lil pressur pipe and intercooler pipe. i even cleaned the intercooler and egr valve.

but still ehrn under acceleration the turbo cuts out, now at 60.

why is this?
 

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I can never understand this kind of thing. You have spent hours taking shots in the dark by cleaning pipes and intercoolers and EGR valves and replacing vac lines. You obviously don't have the proper equipment to test and diagnose the problem (eg VCDS)

Would you not have been better off paying someone whose job it is to have the equipment and knowledge to diagnose these faults to spend a couple of hours on it?

Or at least make some effort to take the advice given to you by four members in this thread alone and get it scanned for codes.
 

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00575 - Intake Manifold Pressure


00575 - Intake Manifold Pressure: Control Limit Not Reached
Possible Symptoms
Sudden complete loss of Power
Reduced Power
Possible Causes
Hoses incorrect connected, disconnected, blocked or leaking
Pressure Unit for Turbo Charger defective
Solenoid Valve for Boost Pressure Control (N75) defective
Possible Solutions
Check Hoses
Check Pressure Unit for Turbo Charger
Check Solenoid Valve for Boost Pressure Control (N75)
Check Basic Setting > MVB 011

00575 - Intake Manifold Pressure: Control Limit Exceeded
Possible Symptoms
Sudden complete loss of Power
Reduced Power
Charge Pressure too High
Possible Causes
Solenoid Valve for Boost Pressure Control (N75) defective
Turbo Charger defective
Possible Solutions
Check Solenoid Valve for Boost Pressure Control (N75)
Check Basic Setting > MVB 011

00575 - Intake Manifold Pressure: Control Difference
Possible Symptoms
Reduced Power
Possible Causes
Solenoid Valve for Boost Pressure Control (N75) defective
Hoses incorrect connected, disconnected, blocked or leaking
Possible Solutions
Check Solenoid Valve for Boost Pressure Control (N75)
Check Hoses
 
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