Boost Leak Around Throttle Position Sensor Help

[Selleck 34GTT]

hey guys had a bit of a search but couldn't find my answer.

ive installed a plazmaman throttle body and plenum

I hooked a compressor up to my intake to pressure test the system whilst doing so found that it was leaking around my tps.

I removed it and sure enough there was a fair amount of air coming out from the end of the throttle shaft seal. it starts to leak at about 14psi and gets worse up to 22psi where I stopped as that's around where itll be getting tuned at.

just want to check if this is normal.

I called plazmaman and they told me that its completely normal and it wont be noticed also that I shouldn't have been doing this as its a static pressure 20psi and so on.

any input from experience would be much appreciated

[GTSBoy]

It shouldn't do that. I can accept that no seal is perfect and that there might be a small leak, but if it is a lot of air, then that it wrong. Having said that, what you think is a lot of air and what I think is a lot of air are likely to be quite different.

In addition, kick the Plazmaman phone person in the snatch for being stupid. There is no difference between being put under 20psi internal pressure on a purely static basis and having the air flow past. Knobheads!

[Selleck 34GTT]

lol well it does seem like quite a bit of air to me but who knows, I guess when it goes in for a tune up ill see what unigroup think.. I didn't think there should be a difference with the static vs dynamic thing but didn't want to seem like a knob head arguing the point if I was wrong

[GeeTR]

The amount leaking is probably insignificant when compared to the amount being ingested by a 2.5L motor under 22psi.

Can you guess the amount leaking? / wrap a balloon over it and measure the fill rate

[Selleck 34GTT]

haha I gave the fitting I used to hook up the compressor back to its owner.. on my hand it felt like the amount you would expect to come out of a 1 or 2mm id hose at that pressure.. not the most accurate guess but a worrying amount to me, even with the tps on you can feel it blowing out on your hands.. my hands are all that sensitive either, no cheek up against it needed

[wolverine]

It's gonna be expensive taking your car to Unigroup and asking Yavus to tune the car with an issue.

[Selleck 34GTT]

As I've already experienced last week, I'm ironing out the issues but I just dont know if this is one of them, might give them a call first

[wolverine]

I would make sure there are zero leaks before taking it to them. In fact you want zero mechanical issues when you arrive there so they can smoke it and get on with tuning unhindered.

Time is money and it only ends up frustrating for both them and you.

[Dose Pipe Sutututu]

Are you speaking to Henry or Alex or Oley (I think I've got the wrong spelling)

[Selleck 34GTT]

I realize this wolverine but how am I to determine if this is an issue when the manufacturer is saying its normal and not to be worried about.. without getting a second opinion from someone who knows what there talking about such as yavus or mark at unigroup

it was alex I spoke to, he was quite helpful through the original purchase stages.

[wolverine]

With all due respect to Alex and Oyay (who have been nothing but helpful to me in the past), if you are paying the bill at Unigroup I would want to give them a sealed intake.

[Selleck 34GTT]

So are you implying that this tb is probably not a healthy one

[Selleck 34GTT]

How would I have it proven to leak for them when they dissaprove of a static pressure test.. btw just to check before this goes further, the regulator on the compressor was showing quite a higher pressure but my assumption is that it was leaking out the valves as both my boost gauges in the car where what I took the readings off..

[Dose Pipe Sutututu]

maybe just come in store and speak to Alex or Henry or Oyay face to face, might make it easier?

tbh, it shouldn't leak at all.

[Selleck 34GTT]

Yeah might do, I would prefer to have a definite that it's an issue first before complaining getting a new one and finding its the same.. i I called yavus he said it is normal and more common in aftermarket tb's as long as it's not excessive.. I have a feeling this may be excessive though

[wolverine]

Yavus is going to tune so if he is happy with it then you should be sweet.

I have had cars back and forth from tuners over the years due to minor niggling issues and I was always lumped with the bill so I am a big fan of taking a week or so extra to get the car 100% mechanically right before tuning.

[Selleck 34GTT]

Yeah I would definitely like to have it 100% but I don't have any other way of having it tested, unless you have suggestions..

The car was being tuned and with a couple of other small faults, he said there was a loud hiss with high boost so I'm trying to find it, it was originally thought to bbe around the intake runners but with the compressor and some soapy water I think I've eliminated that, I found that I accidentally put the check valve in the wrong way for my carbon canister solenoid so I fixed that which was making noise with a bit of pressure from the compressor. I'm hoping that was it if not it must be this tb. I don't think I have another option other than back to the tuner

[wolverine]

Can you take get it Unigroup and ask them to smoke test it before tuning day? That should locate any issues that need attention. Apart from the drive there it shouldn't take very long.

[Selleck 34GTT]

They already did smoke test it, couldn't find it as the smoke test only goes to 5psi and it doesn't pop it's head until beyond that, not sure if me testing it cold allowed it to not show itself I figured cold would be better as nothing would have expanded..