Just installed HPFP... Low boost and rough idle

[Hayden]

Hey guys

Just bought a used upgraded HPFP for going stage 2 and took it for a drive, the boost maxed at 12.. Where as before it peaked at 18 held at 16 with unitronic stage 1. Took everything apart and put it back together and still low boost and drives rough. I'll eventually put the stock one back in and test it... But does anybody have any ideas?

Guy claims it worked totally fine when he pulled it off his car.

Thanks.

 

[GIACUser]

Hey guys

Just bought a used upgraded HPFP for going stage 2 and took it for a drive, the boost maxed at 12.. Where as before it peaked at 18 held at 16 with unitronic stage 1. Took everything apart and put it back together and still low boost and drives rough. I'll eventually put the stock one back in and test it... But does anybody have any ideas?

Guy claims it worked totally fine when he pulled it off his car.

Thanks.

Best way to see if it is operating properly is to log 230-1 fuel specified and 230-2 and see if the pump is delivering as requested. Need tool to diagnose.

 

[Hayden]

Just put the stock pump back on and same problems
Rough when shifting rough idle and low boost
What's going on?

 

[Dumbhorsepoweradiction]

You forget to plug a vaccum or something

 

[Hayden]

You forget to plug a vaccum or something

That's what I was thinking but I've triple checked everything

 

[mfractal]

Any codes?

Sent from my SM-N9005 using Tapatalk

 

[Mikkel]

Did you put the cam follower in correctly?

 

[GTI4John74]

did you get the HPFP tune at least to go stage 2+??