[plague]

Dealer is pressure testing the car tomorrow. After PWM install, ive had nothing but troubles hitting target boost and even building boost properly. What a bummer. Every clamp is tight as could be and fastened on the hosing fine etc. Car ran okay for one night with the stock bypass valves and i was spiking 18lb through the gears with start boost set to 75 (17.5) psi and auto tuning off, but then i couldnt spike over 15 the next day and car feels slower than before the PWM install at this point. i suppose i have a leak somewhere. Uninstalled dv's and reinstalled. double checked all connections and no issues there. Install forge DV's and it then acts even worse, boost building slow, and not hitting targets. Anyone else have these sort of problems with their forge diverter valves at any point? Im obviously having issues either way which makes me thing maybe it is not a problem with the dv's but then again, the problem is pronounced with the forge dv's in car..

[themyst]

I am guessing your wastegate solenoids are failing or your stock charge pipe is leaking at the dv connectors.

[OpenFlash]

Check the vacuum lines going to your bypass valves. I suspect one of them popped off either at the bypass valve or at one of the Ts. Without pressure on the top side of the bypass valve, they will lift under boost and create a nasty boost leak.

[plague]

Originally Posted by shiv@vishnu

Check the vacuum lines going to your bypass valves. I suspect one of them popped off either at the bypass valve or at one of the Ts. Without pressure on the top side of the bypass valve, they will lift under boost and create a nasty boost leak.

will do shiv. and myst, im using vishnu charge pipe, not the stock. and the thing fits very very snug with the upper intercooler elbow supplied and mounts into hosing that connect to throttle bottle very well. and is clamped very well. ive eliminated any leak from the elbow or chargepipe. i think its
vaccuum line or something.

[cstmx_ryder]

Did you install the forge DVs correctly? Some have installed them incorrectly.....ie. the nipples of the vacuum lines should NOT be on top, but instead, they should be facing each other....

Just a thought since you said the problem got worse after installing the forge DVs.

[KyLu II]

Originally Posted by cstmx_ryder

Did you install the forge DVs correctly? Some have installed them incorrectly.....ie. the nipples of the vacuum lines should NOT be on top, but instead, they should be facing each other....

Just a thought since you said the problem got worse after installing the forge DVs.

Different dv's models need to be installed differently...
Also as far as my understanding the dv's are operated by vacuum...

[cstmx_ryder]

He said he had Forge DVs, AFAIK, there's only one way of installing them, with an options for diff color springs and optional shims....

Originally Posted by KyLu II

Different dv's models need to be installed differently...
Also as far as my understanding the dv's are operated by vacuum...

[plague]

i was on the phone with forge confirming how the fit. and it is with the TOPS (where u read forge) facing eachother. nipples arent facing eachother. according to them at least

[KyLu II]

Originally Posted by cstmx_ryder

He said he had Forge DVs, AFAIK, there's only one way of installing them, with an options for diff color springs and optional shims....

I kno what he has...
One way to install them..(actually the nipples will interfear with dci if equipped)


And this model is self explanatory....

[themyst]

Well, vacuum lines are reasonably easy to diagnose. If you tug and it comes out, time to trim the line and ensure a tight fit.

My money's on something else though.

[plague]

those valve is that pic are NOT the ones i have ... but i suppose thats ok

[KyLu II]

Originally Posted by themyst

Well, vacuum lines are reasonably easy to diagnose. If you tug and it comes out, time to trim the line and ensure a tight fit.

My money's on something else though.

What you think it could be?

[cstmx_ryder]

IIRC, don't you have the Vishnu CP? So wouldn't the Forge DVs look like the ones in the Stett pic? Because the first pic is with the stock CP......

[cstmx_ryder]

Originally Posted by KyLu II

I kno what he has...
One way to install them..(actually the nipples will interfear with dci if equipped)


And this model is self explanatory....

^^That's not really self explanatory....The way those DVs are displayed on the Stett CP isn't the correct position.....

[plague]

Originally Posted by cstmx_ryder

IIRC, don't you have the Vishnu CP? So wouldn't the Forge DVs look like the ones in the Stett pic? Because the first pic is with the stock CP......

i have the vishnu charge pipe yes sir. and here is a direct link to my diverter valves which i purchased from ar design..


http://www.ardesign.info/store/bmw-1...4-ddv-kit.html

[cstmx_ryder]

OIC, I was under the impression that there's only two different types of DVs (as far as the look and placement of the nipple goes). One that fits on the stock CPs, and one for the after market CPs. I guess there's three types....lol. My bad!

Anyway, GL with finding the problem, keep us posted!

Originally Posted by plague

i have the vishnu charge pipe yes sir. and here is a direct link to my diverter valves which i purchased from ar design..


http://www.ardesign.info/store/bmw-1...4-ddv-kit.html

[themyst]

Originally Posted by KyLu II

What you think it could be?

See my first post in this thread. BTW it is goddamn painful running tuneless Thinking about throwing the leftover tune back in just to satiate my lack of power!

[plague]

Originally Posted by themyst

I am guessing your wastegate solenoids are failing or your stock charge pipe is leaking at the dv connectors.

no leak from charge pipe or dv connections. theyre tight and snug as hell with good fitment

[themyst]

Originally Posted by plague

no leak from charge pipe or dv connections. theyre tight and snug as hell with good fitment

I really believe it's the wastegate solenoids. A smoke test would find this pretty quickly though.

Once you eliminate that as a problem, along with the vacuum lines and any potential leaks, then I would explore the possibility of the tune being at fault.

[plague]

Originally Posted by themyst

I really believe it's the wastegate solenoids. A smoke test would find this pretty quickly though.

Once you eliminate that as a problem, along with the vacuum lines and any potential leaks, then I would explore the possibility of the tune being at fault.

explain this 'smoke test' please. you mean literally just looking for smoke out of the tailpipes? i am sure that i am not smoking at all, and plenty of people running the 7-11 maps without this issue and the firmware was installed 0-100% successfully so im banking on some sort of boost leak probably vaccuum line but i really dont know. checked vaccuum lines early, everything looked A okay. :/ hopefully the dealer wont try raping me for pressure testing the system..

[themyst]

Originally Posted by plague

explain this 'smoke test' please. you mean literally just looking for smoke out of the tailpipes? i am sure that i am not smoking at all, and plenty of people running the 7-11 maps without this issue and the firmware was installed 0-100% successfully so im banking on some sort of boost leak probably vaccuum line but i really dont know. checked vaccuum lines early, everything looked A okay. :/ hopefully the dealer wont try raping me for pressure testing the system..

LOL no, they smoke (pressure) test the whole system starting at the FMIC inlet and check for smoke at all the connecting joints. A fully leak-free system won't show any smoke.

[themyst]

the wastegate solenoids crapped out on me on my old N54, the car would build boost slowly, inconsistent response, and eventually it failed outright, which would trigger an underboost code any time I tried to go WOT. Took the dealer a week to fix it; they replaced the vacuum canisters, when that didn't work, they smoke tested it and found one of the wastegate solenoids failed. All covered under warranty.