[NJGreenBudd]

Can it view live data like MAF sensor readings? You might be able to just flip through the sensors and make sure they are all giving reasonable readings. Make sure to do iton a hot day or after driving for a while, try to replicate the conditions of when the problem occurs.

 

[ninjatanzen]

It can read live data like that, yep. What should I be looking for under that? I didn't have any boost issues today, but under WOT my MAF read 192. Cruising was between 15-30.

 

[volvos60t5x]

you need to check the Kg/h at idle, thats the reading you need to check not at wot. It should be around 12-20 kg/h

 

[ninjatanzen]

It reads in g/s, so I'm guessing that is different? It sits at 3.5 at idle. I had no boost again and it read 50 g/s max during that point.

EDIT: Found an online converter. It's at 12.6 kg/h at idle, 180 kg/h when it won't hit boost.

 

[ninjatanzen]

I also have my new ignition coils in and am going to put my new wastegate in. I know you guys said it either works or doesn't, but I'm no longer hitting 14 lbs boost in 3rd gear (only 9). Plus I wanted the adjustment tool from ARD so I just bought the wastegate while I was at it. It should open at 4 psi for where I am at, right?

 

[NJGreenBudd]

Coils can do some funky stuff when they are failing, I had some OEM with 100,000 miles on them and it would boost to 10psi or so but didn't like to go WOT, it would spike to like 16psi and then drop back down and sputter, felt absolutely terrible. A new set of IPD HD coils had the car boosting to 16-17psi and holding it perfectly solid again.

Let us know if they make a difference for you.

WGA should start to crack around 2.5-3.0 psi and be open by 4.0psi for a setup like yours.

 

[ninjatanzen]

The ignition coils didn't solve the problem unfortunately. I pulled out my old wastegate and what do you know, the one Lucky sent me is the wrong one. So I'll have to wait on that one.

 

[ninjatanzen]

Just checked and my turbo says 14T, does this mean I have a 2.4 engine? It does have 2.4 stamped on the top of the engine block. I swore I had the 13T 2.5.

 

[NJGreenBudd]

2005 14t 2.5l

 

[ninjatanzen]

No way! Well that's good to know. I'm sure Don from Elevate knew this, but just in case I might send him an email to make sure the tune was for a 14T. I'm trying to eliminate all possibilities of this boost issue. My MAF looks fine and clean too, along with reading the proper kg/h at idle.

 

[NJGreenBudd]

I'm sure he knew, and even if he didn't it wouldn't result in your symptoms. Keep in mind there are a bunch of us running 16T turbos on tunes created for the 13T/14T, has nothing to do with intermittent boost. I knew how frustrating this is for you and I hope you get it resolved, just approach it logically, start with the basics of fuel, air and spark, think about what is affected by temperature if that's what causes your problem.

 

[URO_S6O]

What's the odds that your boost gauge is faulty? Do you feel / hear the turbo kicking in at all? You've gone through the TCV/coils/cbv, vacuum lines...plugs, ecu software, maf... you've hit every major component that controls or deals with the turbo and its effects (pressure or in your case lack thereof). Even if the exhaust housing had a slight crack or any piping from cold side to TB had a small crack you'd still get some boost, not 0 psi. Could it be that your turbo is completely shot and not working? Either something is seriously and terribly wrong with your engine/turbo or we all are completely failing to pick up something small that we over looked.

I'm at a lack of words to help you but I wanted to recap what has been thought of and looked at or replaced to get us back to diagnosing what's wrong. Maybe it's time to bring it to Volvo dealership and see if a tech can hunt it down. Then once you know the problem you can fix it on your own to save on the crazy labor fees.

 

[ninjatanzen]

The CBV is actually not replaced at this point, couldn't get it off (couldn't get at it). The boost gauge is fine, I can physically feel when it sticks at 0 lbs as well. It normally boosts to 14 psi (not in 1st-3rd though), so the turbo still works. I didn't feel any shaft play on it either. I also redid my intake piping everywhere to double check for cracks in any hoses, and then to re-install and make sure there were no leaks.

I might go in to a Volvo dealership, though I had the concern of my exhaust. With no cat on it (in Michigan, no emissions testing) will I get into trouble?

 

[URO_S6O]

I don't foresee you getting scolded for not having a cat. if it isn't required by state law.

 

[URO_S6O]

Also if the CBV was broken and open all the time you'd still build boost, once you hit the max rating on the spring/piston it opens to let excess air out to prevent the turbo from continuing to build higher than calibrated boost (from what I'm tracking, maybe using different wording) so at the max rating it opens but you'd maintain to build X pounds of boost what you'd see in 4th gear seeing you actually get boost there. So I honestly do not think it's the CBV at all seeing you do see boost in gears greater than 3.

 

[Dreamsk281]

The CBV is actually not replaced at this point, couldn't get it off (couldn't get at it). The boost gauge is fine, I can physically feel when it sticks at 0 lbs as well. It normally boosts to 14 psi (not in 1st-3rd though), so the turbo still works. I didn't feel any shaft play on it either. I also redid my intake piping everywhere to double check for cracks in any hoses, and then to re-install and make sure there were no leaks.

I might go in to a Volvo dealership, though I had the concern of my exhaust. With no cat on it (in Michigan, no emissions testing) will I get into trouble?

If the right cop figures out u dont I've seen them give ticket, but very rare shut off the car when pulled over and they have no idea btw where at in Michigan are you

 

[NJGreenBudd]

The CBV is actually not replaced at this point, couldn't get it off (couldn't get at it). The boost gauge is fine, I can physically feel when it sticks at 0 lbs as well. It normally boosts to 14 psi (not in 1st-3rd though), so the turbo still works. I didn't feel any shaft play on it either. I also redid my intake piping everywhere to double check for cracks in any hoses, and then to re-install and make sure there were no leaks.

I might go in to a Volvo dealership, though I had the concern of my exhaust. With no cat on it (in Michigan, no emissions testing) will I get into trouble?

Dealership might mention it but they aren't going to be able to do anything about it, they aren't the enforcers of the law. In NJ I run catless and the dealerships have never mentione dit other than to point out it's a benefit to them as far as no concern for clogged cats.

Also if the CBV was broken and open all the time you'd still build boost, once you hit the max rating on the spring/piston it opens to let excess air out to prevent the turbo from continuing to build higher than calibrated boost (from what I'm tracking, maybe using different wording) so at the max rating it opens but you'd maintain to build X pounds of boost what you'd see in 4th gear seeing you actually get boost there. So I honestly do not think it's the CBV at all seeing you do see boost in gears greater than 3.

That's not how the CBV works at all. It doesn't regulate boost pressure. Keep in mind the CBV is exposed to boost pressure on both sides of the diaphragm under acceleration so it's pinned in place from the pressure generated by the compressor and manifold pressure. It only acts when the pressure from the compressor is grater than the manifold - ie throttle lift. It's only job is to prevent damage to the turbocharger from compressor surge.

Torn CBV just makes a flutter under throttle lift.

 

[ninjatanzen]

If the right cop figures out u dont I've seen them give ticket, but very rare shut off the car when pulled over and they have no idea btw where at in Michigan are you

Luckily I haven't been pulled over in this car yet, but I always turn off my car and set my keys on the dash when I'm pulled over Also I'm in the Macomb area.

Dealership might mention it but they aren't going to be able to do anything about it, they aren't the enforcers of the law. In NJ I run catless and the dealerships have never mentione dit other than to point out it's a benefit to them as far as no concern for clogged cats.

That's not how the CBV works at all. It doesn't regulate boost pressure. Keep in mind the CBV is exposed to boost pressure on both sides of the diaphragm under acceleration so it's pinned in place from the pressure generated by the compressor and manifold pressure. It only acts when the pressure from the compressor is grater than the manifold - ie throttle lift. It's only job is to prevent damage to the turbocharger from compressor surge.

Torn CBV just makes a flutter under throttle lift.

Alright, maybe this coming week I'll head over to my Volvo dealership. It's about 45 minutes away so it's not too bad. I'll have them try and figure out the boost issue as well as my rubbing/wobble or whatever from my front right axle.

I haven't heard flutter when I let off, just a solid 'psssh' of air rushing back into the intake.

Also I'll be sending out my ARD wastegate for one that fits the 14T on Monday. Lucky is nice enough to swap them out for me, I just have to pay return shipping (understandable).

 

[URO_S6O]

That's not how the CBV works at all. It doesn't regulate boost pressure. Keep in mind the CBV is exposed to boost pressure on both sides of the diaphragm under acceleration so it's pinned in place from the pressure generated by the compressor and manifold pressure. It only acts when the pressure from the compressor is grater than the manifold - ie throttle lift. It's only job is to prevent damage to the turbocharger from compressor surge.

Torn CBV just makes a flutter under throttle lift.

You are correct, I wrote that after a long, very long 32 hour shift without sleep. At that point even I can only laugh at what I wrote earlier in the complete and utter failure of the proper description of the CBV and what it does. Basically all I can say is at the time I suppose I was trying to say I doubt the CBV is preventing him from building boost what so ever. OP sorry for the confusion and lack of insight.

 

[ninjatanzen]

No worries, I came out with more knowledge than I did walking into it Plus I wouldn't hold anything against someone after a 32 hour shift! That is crazy.