Golf 4 GTI(AGU) 110kw misfire and N75 nightmare

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Jrmunger199
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Golf 4 GTI(AGU) 110kw misfire and N75 nightmare

Post by Jrmunger199 »

Hi guys, I’m having some serious problems.

I have a Golf 4 GTI 1.8T AGU(110kw)

These are the problem and the error codes I’m currently facing, the car has a major misfire, but only when the n75 valve is plugged in, when unplugged the misfire disappears but has a major lag when accelerating hard, accelerating slowly it kind of boosts but still not right.

01262 - solenoid valve for charge pressure control(N75) short circuit to ground
00528 - Altitude sensor(F96) signal too low
16486 - Mass or Volume air flow circ. low input

Could the following codes cause the above scenario?

Any help on the above will be highly appreciated
Last edited by Jrmunger199 on Fri Aug 21, 2020 5:00 pm, edited 1 time in total.
User avatar
Jrmunger199
Cadet
Posts: 62
Registered for: 4 years 3 months

Re: Golf 4 GTI(AGU) 110kw misfire and N75 nightmare

Post by Jrmunger199 »

Jrmunger199 wrote:Hi guys, I’m having some serious problems.

I have a Golf 4 GTI 1.8T AGU(110kw)

These are the problem and the error codes I’m currently facing, the car has a major misfire, but only when the n75 valve is plugged in, when unplugged the misfire disappears but has a major lag when accelerating hard, accelerating slowly it kind of boosts but still not right.

01262 - solenoid valve for charge pressure control(N75) short circuit to ground
00528 - Altitude sensor(F96) signal too low
16486 - Mass or Volume air flow circ. low input

Could the following codes cause the above scenario?

Any help on the above will be highly appreciatedImage
Updating so that anybody that possibly has the same issue can check these components.

ECU was replaced, all the faults disappeared except for MAF fault.
Replaced the MAF and the fault disappeared
Car was still jerking.
Check fuel pressure, was running stable but too low.
Replaced the fuel pressure regulator, corrected the issue slightly but still laggy almost as if turbo was pulsing coming into boost.
Replaced fuel pump and all the problems were sorted.
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