Mk5 gti stalls out at high speed

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Calvinmk5gti
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Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi guys,been having issues with my second hand mk5 gti,for some reason the car will stall out at high revs,car is stock.However it dont happen all the time,not sure if fuel cuts etc....recently did the cam follower,which was damaged,did the fuel filter aswel,which of i remeber was a 6.4bar.Please help guys,Any one around Durban can do a scan on vag for me please
shamalm
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Re: Mk5 gti stalls out at high speed

Post by shamalm »

Check the intake cam lobe that runs the hpf
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Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Going to take out the cam chain cover to check the lobe will post pictures to get the best feedback

Thanks
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Ageless_ZA
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Re: Mk5 gti stalls out at high speed

Post by Ageless_ZA »

You can check the lobe by removing the HPFP.

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Farhad1
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Re: Mk5 gti stalls out at high speed

Post by Farhad1 »

It's HPFP sensor, its probbaly cracked and this happens when it hot.

replace HPFP and the problem will be gone
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Re: Mk5 gti stalls out at high speed

Post by Camo »

Farhad1 wrote: Wed Jun 12, 2019 10:54 am It's HPFP sensor, its probbaly cracked and this happens when it hot.

replace HPFP and the problem will be gone
yip,..was gonna say the same
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shamalm
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Re: Mk5 gti stalls out at high speed

Post by shamalm »

i have hpfp if you want.

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'06 MK5 Gti - viezu sw and viper dp
'87 Jetta cli 16v exec
'08 polo 1.6 comfortline
'03 mk4 gti - revo sw and fastcar exhaust
'85 mk2 gti 1.8 8v
Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi guys,managed to open the cam chain cover to view the lobe,it has some wear on it,any ideas were i can get a second opinion on it in Durban,if the lobe is fine then showly i will need a new pump
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Re: Mk5 gti stalls out at high speed

Post by Camo »

why do you need a new pump?
Did you check the sensor on the pump for cracks?
Lastly unplug MAP Sensor and see if the problem persist...could be that too
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Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

The pump has some wear on it,has i have cam follower damage.However the sensors on the pump dont seem to have any cracks,theres 2 sensors 1 on the top and 1 on the left.The car as been running maf less
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Re: Mk5 gti stalls out at high speed

Post by Camo »

did the pumps go through the Cam Follower?
Maybe the Mafless tune is your problem!...anyway as said check the MAP Sensor on the throttle pipe
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi guys,Been really busy,so i finally got around to change the Pcv and Plugs,However no fix to the problem.At high speed the engine stalls not sure what else to do,can any 1 recommend a good mechanic in Durban to assist me
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Re: Mk5 gti stalls out at high speed

Post by Trishen94 »

Do u have acces to vcds ? If not get urself 1 then log the car and see whats the problem. im also 100% sure that if u check fault codes it would have definitely threw an error dont waste money buying pumps ,coils and plugs when it might be something on the opposite end of the world thats broken ...and if i may ask y do a mafless tune on a mk5 gti with ko3 turbo ? Or are u running big turbo setup
Log:
Engine speed
rail pressure actual and specified
Fuel pump pressure actual and specified (intank pump)
Cylinder misfire 1,2,3,4
Timming retardation cylinders 1,2,3,4
Boost pressure actual and specified
And ur lamda ...post the logs and some1 will assist

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Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi Guys,Strange thing today so i took the car for a drive and removed the Maf sensor and the car was driving like a beast,however i still had a idle hunt.....no im confused.
Trishen94
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Re: Mk5 gti stalls out at high speed

Post by Trishen94 »

R u running a cold air intake?
I think ur car DOES NOT have a mafless file coz if it was a mafless tune then whether its plugged in or not should not make a difference coz the maf DOES NOT work on a mafless tune
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Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi was running the car wothout the maf,now that i put the maf back it works well, but then i dont get full throttle.Once removed then o get full response but huntting idle
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Re: Mk5 gti stalls out at high speed

Post by Riyaadhsaley »

Those mafs are finnicky things. Any oil residue or debris build up and your readings go haywire. Get some electronic switch cleaner and clean that maf sensor properly. Don't be stingy with it. Make sure though that you don't use q20 or any other liquid. The switch cleaner is mostly alcohol and evaporates immediately, resulting in no remaining residue.
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Calvinmk5gti
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Re: Mk5 gti stalls out at high speed

Post by Calvinmk5gti »

Hi Guys,finally got around to getting the car Diagnosed.Came up with errors intake manifold flap stuck,and missfire in cylinder 1.So any has a manifold to sell to me

Thanks
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