What's this vac line for ?

[BigRAWesty]

Ok so had a look and the PVA is not disconnected and not cable tied open... I should now do so I guess ?

So chase that line back from the valve to see if the vacuum part is still all connected.
If they've blocked the line but haven't disconnected the valve. Done a half ass job.

Good to hear about the maf though. Have you tried cleaning the maf sensor?? Might be an underling issue.

[StavTB48]

Hi Kallen,

Just had a good look and everything is connected at the valve end, vac line to the solienoid or what ever its called and then the vac line comming out with the screw in the end so I will have a look on the net for the tutorial for this mod sus it out and complete the job. There is a possibility that it was done and disconnected and a mech decided to "fix it" on the rod/valve end during its service I will have to ask him when he puts the new throttle body.

Good point on the MAF, im going to pick a can of MAF cleaner on the way home and give it ago, already read the thread on here and seems pretty strait forward.

Will let you guys know hwo i go.

[BigRAWesty]

Hi Kallen, Just had a good look and everything is connected at the valve end, vac line to the solienoid or what ever its called and then the vac line comming out with the screw in the end so I will have a look on the net for the tutorial for this mod sus it out and complete the job. There is a possibility that it was done and disconnected and a mech decided to "fix it" on the rod/valve end during its service I will have to ask him when he puts the new throttle body. Good point on the MAF, im going to pick a can of MAF cleaner on the way home and give it ago, already read the thread on here and seems pretty strait forward. Will let you guys know hwo i go.

So they started the mod but didn't finish it then. So yea up to you if you finish it or restore it back to factory. It sounds like the vac line just taps into the intake ducting but yea study the write ups.
Glad we got an out come and hopefully this will fix the petrol issue

[Bloggsy]

The mod is pretty simple, even I could do it.

1. Remove the 'E' clip and washer and slide the actuator rod off the PVA (Power Valve). Keep the 'E' Clip and washer somewhere safe in case you decide to undo the mod.
2. Disconnect the vacuum electrical connector that activates the solenoid (the one shown in your picture at the front of the solenoid). Some people blocked the vacuum line instead, like yours. I removed the connector, taped it up and cable tied it out of the way.
3. Turn the PVA clockwise to its maximum point and cable tie it in that position (as in picture).

[StavTB48]

Ok so MAF came out looking new but still gave it a clean did it over white cloth as in the thread on here and not much to be seen at all its back in so that's that, I have removed the bar from the PVA valve can cable tied it open, didn't completely fix the lagg whist cursing and roughness on the petrol but the response during take off is a lot smoother.

Didn't disconnect the battery at the time so will pop outside in a min and disconnect it for a little then a spin around the block. probably wont be able to tell much as from what i read after disconnecting the batt it can take a few k's to even everything out?

Cheers.

[BigRAWesty]

Ok so MAF came out looking new but still gave it a clean did it over white cloth as in the thread on here and not much to be seen at all its back in so that's that, I have removed the bar from the PVA valve can cable tied it open, didn't completely fix the lagg whist cursing and roughness on the petrol but the response during take off is a lot smoother. Didn't disconnect the battery at the time so will pop outside in a min and disconnect it for a little then a spin around the block. probably wont be able to tell much as from what i read after disconnecting the batt it can take a few k's to even everything out? Cheers.

So we've found the blocked vac lines purposes. Hopefully this will help with the petrol tune

[StavTB48]

Hi Gent's, OK so thanks for solving my blocked vac line issue!!

Topped it up with gas and petrol with a few spins around the block then opening it up on the freeway and the lag and rough issue with the Petrol is still there and still not 100% the way it was on the gas so thinking its down to the throttle body and a tune.

Thanks again been much help!

[BigRAWesty]

Hi Gent's, OK so thanks for solving my blocked vac line issue!! Topped it up with gas and petrol with a few spins around the block then opening it up on the freeway and the lag and rough issue with the Petrol is still there and still not 100% the way it was on the gas so thinking its down to the throttle body and a tune. Thanks again been much help!

Sweet mate. I'd start with a tune to a good mechanic. Who knows what affect the valve was playing

[mudski]

See if there's any part numbers on the solenoid. Most Nissan parts will have the OEM number on them. Google it or pm me with what you find if you like and I can find out what it is.
If it helps.

[StavTB48]

Hi gent's just thought I would mention that I have reconnected the rod at the moment as boost or power when needed for example when overtaking on the freeway was lacking or better described as a bit slow to pick up speed when already doing 90/100. Still haven't had it tuned yet as my fault code saga continues and looking like money spent on a new throttle body might have been a waste of time/money. Maybe one day if its fixed without replacing everything under the bonnet ill find out if there is any benefit having the pva mod done on my truck.

Cheers.