Hpfp
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- Captain
- Posts: 2716
- Registered for: 16 years 4 months
- Car Make: Audi Quatro, polo Beast and A3
- Car Model: S3, Polo Playa,
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- Location: Klerksdorp
Hpfp
Anyone can share some idea to solve this issue.
Have problems with hpfp to deliver 130bar, highest it goes 90bar though request is 130bar, new hpfp pump, new intank fuel pump, new controler for intank fuel pump, new s4 rail relieve valve, new rail pressure transmitter
Have problems with hpfp to deliver 130bar, highest it goes 90bar though request is 130bar, new hpfp pump, new intank fuel pump, new controler for intank fuel pump, new s4 rail relieve valve, new rail pressure transmitter
- BdtDSG
- Cadet
- Posts: 63
- Registered for: 12 years 1 month
Re: Hpfp
Any wear on the intake camshaft lobe?vwpro wrote:Anyone can share some idea to solve this issue.
Have problems with hpfp to deliver 130bar, highest it goes 90bar though request is 130bar, new hpfp pump, new intank fuel pump, new controler for intank fuel pump, new s4 rail relieve valve, new rail pressure transmitter
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- BdtDSG
- Cadet
- Posts: 63
- Registered for: 12 years 1 month
Re: Hpfp
AFAIK the intake cam is replaced as a whole when the HPFP wears down the cam follower and damages the camshaft.Dale wrote:Sorry for the hijack, Are the lobes on the revised intake shafts removeable or does the complete thing need to be replaced?
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-
- Captain
- Posts: 2716
- Registered for: 16 years 4 months
- Car Make: Audi Quatro, polo Beast and A3
- Car Model: S3, Polo Playa,
- Membership No: missing
- Location: Klerksdorp
Re: Hpfp
Relaced, lift on lobes on new cam measure 5.5mmBdtDSG wrote:Any wear on the intake camshaft lobe?vwpro wrote:Anyone can share some idea to solve this issue.
Have problems with hpfp to deliver 130bar, highest it goes 90bar though request is 130bar, new hpfp pump, new intank fuel pump, new controler for intank fuel pump, new s4 rail relieve valve, new rail pressure transmitter
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- BdtDSG
- Cadet
- Posts: 63
- Registered for: 12 years 1 month
Re: Hpfp
And when HPFP was replaced, was it only internals replaced or complete new pump? Just asking since I went through some fuelling issues of my own recently...vwpro wrote:Relaced, lift on lobes on new cam measure 5.5mmBdtDSG wrote:Any wear on the intake camshaft lobe?vwpro wrote:Anyone can share some idea to solve this issue.
Have problems with hpfp to deliver 130bar, highest it goes 90bar though request is 130bar, new hpfp pump, new intank fuel pump, new controler for intank fuel pump, new s4 rail relieve valve, new rail pressure transmitter
Sent from my SM-G935F using Tapatalk
Sent from my SM-G935F using Tapatalk
-
- Captain
- Posts: 2716
- Registered for: 16 years 4 months
- Car Make: Audi Quatro, polo Beast and A3
- Car Model: S3, Polo Playa,
- Membership No: missing
- Location: Klerksdorp
Re: Hpfp
Complete new pumps, one I installed a upgrade plunger in but pressures stays on 90bar, upgrade suppose to go up to at least 145bar
- BdtDSG
- Cadet
- Posts: 63
- Registered for: 12 years 1 month
Re: Hpfp
In my case the tension on the old hpfp spring was too low. So sourced a new pump and used the spring from that along with the new autotech hpfp internals (which doesn't come with a new spring). I could compress the old pump easily with my hand compared to the a new spring. Perhaps have a local tuner monitor VCDS while you drive to try and isolate the issue... What pressure does the LPFP reach?vwpro wrote:Complete new pumps, one I installed a upgrade plunger in but pressures stays on 90bar, upgrade suppose to go up to at least 145bar
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-
- Captain
- Posts: 2716
- Registered for: 16 years 4 months
- Car Make: Audi Quatro, polo Beast and A3
- Car Model: S3, Polo Playa,
- Membership No: missing
- Location: Klerksdorp
Re: Hpfp
Did that logs with the vcds, on idle the lpfp between 2.5bar and 6bar on higher rpms. The lpfp is new and the controler.
Suspect the voltage supply to the hpfp that maybe brakes away, tester don't show such quick variation, try now for a scope to check the supply
Suspect the voltage supply to the hpfp that maybe brakes away, tester don't show such quick variation, try now for a scope to check the supply
- BdtDSG
- Cadet
- Posts: 63
- Registered for: 12 years 1 month
Re: Hpfp
Any recent changes made to the car? Fuel filter replaced?vwpro wrote:Did that logs with the vcds, on idle the lpfp between 2.5bar and 6bar on higher rpms. The lpfp is new and the controler.
Suspect the voltage supply to the hpfp that maybe brakes away, tester don't show such quick variation, try now for a scope to check the supply
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