Hey guys..

So i just installed my detroit tuned bypass valve after installing it i started the engine and it started chugging..
seemed as if the engine was about to shut off..
which i then realized that i forgot to plug the plug back into the throttle body..
stupid me..even after plugging it back in..car still chugged like crazy..
i then went to reset the ecu..which helped A LOT..almost fixing the problem.
but i dont know if it's just me or not..but after i rev..right before it goes to idle it kind of stumbles? kind of feels like it lost power for a milisecond?
(is this because of the the stiffer bypass valve? is it normal? when im crusing and i stomp the throttle and let go right after i stomp the car lurches? kinda of like when you're in low gear, higher speed? lmk about this too please )
best i can explain it..but hopefully you guys know wat i mean..
the service check light came on too..even after resetting the ecu and cycling the ignition? it didnt go away
so i then took it advanced auto parts (autozone basically) and a guy used the code reader and he said there was three codes..i honestly dont remember exactly wat he said but basically that the throttle body was higher or lower? something else electrical wise that had to do with the throttle body, and another code for the intake ( i have the ddm intake)
i asked him to make the service light go away which he did..
everything seems ok? but like i said earlier only problems are that when letting off the gas, right before it goes to idle the engine seems like it's about to stall? for a milisecond, and i THINK? when i was driving at a steady speed (highway) i lost power for a milisecond? might have been cause i went over a bump perhaps? and also, when driving highway speeds, at 3,000 rpm there's an odd high pitched whistling sound..kind of sounds like 2 metal pieces griding (very high pitched whistle)? but i think it def sounds like it comes from the intake..
i guess for the whistling sound i can remove and reattach the intake tubes and wat not..

but does anyone know if i get it tuned? if it will help with anything or if anything is infact wrong with my car at all?
or is this all just in my head?

let me know your thoughts!

thanks in advance

p.s. on a lighter note..even though my mcs is an 06, i still felt a good amount of throttle response..not day and night difference but enough to notice..at idle and when accelerating

**UPDATE**

after removing and replacing the bypass valve multiple times, checking and re-checking that everything was correct..
i ended up putting the stock bpv back on.
it's unfortunate but the whistle is definitely gone..
so you guys with the 05-06's..you might be better off keeping the stock one on..
(im gonna be selling the DTBPV so check it out )

 

Sounds like you might have a vacuum leak. Do a search on Bypass Valve. I seem to recall various people breaking the small line at the valve.

 

hmm breaking which small line? im not sure exactly went wrong or where the vacuum leak would be..

 

Why did you unplug the throttle body to change the BPV?

 

hm..i realized that after? but to move it out of the way..that's wat it said to do in the directions from DT

 

Check the tab on the intake tube to the SC

 

also it's easy to ruin the rubber o-ring between the throttle body and tube.

 

re-check all your work. Most problems like this happen right where one has worked on the car and something didn't go back together quite right.

Some find that the DT-BPV just doesn't play well with thier car. Have you talked to Chad about this? He's got tons of experience and will help you out. At least you'd know if others had the same response if it wasn't a vacuum leak. While drastic, if you stock BPV wasn't shot, put it back in and see if the car works fine again.

I wouldn't reccomend getting a tune to mask a problem that sounds like it's from something else being wrong.

Matt

 

i dont think i broke the tab on the sc intake tube..as i looked at it with a flash light..it's that tab that's held in by a bolt/screw? right?
if so..it seems intact and nothing really seems to be wrong..
i am in the middle of putting it back together after pulling everything apart again
if i still have a problem then i guess i'll go ahead and try to install the stock one back on
but so far everything does seem fine..nothing out of the ordinary..nothing seems broken and i made sure all the tubes are on all the way and nice and tight
i will update when i finish putting it back and go for a test run

(oh and thanks for all the help so far guys..much appreciated!!)

 

ok..so i put everything back together
when pushing the gas and letting go it still feels like it loses power right before it goes idle..(dunno if that's normal)
and main thing that really bothers me is when driving..i hear that odd high pitched whistle..
it only comes on at about 3,000 rpm and only can hear it when in 2nd(maybe?) to 6th gear..
do you guys think that whistle is coming from the bypass valve?
i would replace the DT one with the stock one..but im tired from just putting it back together and figured i'd get your thoughts first..
oh and the whistle only stays when i push the gas with a certain amount of pressure
so if i'm going faster or slower, there's no whistle noise..

 

if it aint broke dont fix it.

sorry dude dont have any ideas what it may be.

 

Gee, that's a helpful comment...NOT.

Call Chad at DT. 586.792.MINI


Jim

 

The sound is the air going past the throttle plate at part throttle. It is usually more noticeable with a free flowing air filter or more air passing by. Possibly the bypass valve is closing much sooner than the stock one causing/creating positive pressure at the throttle plate during part throttle.

 

no worries but thanks for that tip Jim!
But I actually already called him after I forgot to plug in the throttle body..:(
I tried calling him today but he wasn't answering so I left a message..hopefully he gets back to me
I am taking my car to the dealer to get some engine noise fixed/looked at
so I guess I'll just tell them about the weird whistle noise..
Hopefully they don't blame it on anything and will be able to fix it

 

so basically it's cause of the new bypass valve? Is it better to just put the stock one back on?
Or is there any way to get rid of the whistle?
It kinda sounds like a tv turning on..

 

pull tb and check o-ring . it's way easy to ruin and from outside you cant tell but it'll leak bigtime
my 2 cents . p.s. it happpened to me .

 

Hmm..wat were your symptoms of having the o-ring messed up?
And sorry..must have overlooked your first post..

 

Just noticed your's is an 06 - I would STRONGLY recomend you switch back to the stock BV. The DTBV was designed for earlier models that had an issue with the stock unit - I am betting your problems are stemming from trying to fix something that was not broke to begin with.

There are quite a few that have had issues after switching to the DT BV when not needed. I switched to the DTBV and have some minor issues and have toyed with the idea of going back to the stock one.

 

i was thinking of switching back to the stock one..hmm..
i really dont want to tho..as i definitely do feel a bit of a difference in throttle..
i guess if i have time tomorrow i'll try to replace it back to the stock bpv
(i am getting faster and faster at it though.. )

 

just do a cam, injectors, and tune - you will not notice the BV

and yes the BV sucks to switch - it is just a pain in the a$$

 

i wish..im always short on money and i try not to spend too much on my car..
but i guess ill just go ahead and try switching back to stock and see how it goes..if it's the same..ill just put the DT back on..:GRIN:
might as well right?
it only takes me about an hour to take out everything and put it back in..(dunno if that's slow or fast..)

 

OK guys!!
so i just finished reinstalling the stock BPV..and walla!!
whistling is GONE...
it's still there at higher rpm's but it's VERY faint..you really have to try putting a certain amount of throttle to get it just right..
but it was probably like that before? i guess the DTBPV made it more noticeable?
perhaps..
anyways i wont be reinstalling the DTBPV..i wish more people with 05 or 06 installed the DTBPV..
maybe i wouldnt have wasted my time installing it..
oh well!! it was definitely an experience and now it's a piece of cake to do..

only thing else is..when revving at a low rpm and letting go..it seems like the engine loses power right before going to idle?
is that normal or am i just being paranoid?
(let me know about that guys..if your mini does that or if that's not normal)

but as always thanks for all the help!!

and in conclusion..if you have an 05 or 06, you might be better off keeping the stock one on there..so proceed at your own risk!

 

and oh..i'll be putting the Detroit Tuned bypass valve up for sale..so if ya want it check out the ad!

 

in a land far far away (sorry, couldn't help myself), the DT BPV was called the Ryephix II. It was an stiffer, shorter spring installed in the existing valve diaphram. I didn't like how it worked in my car, so I took it back out, sold it and before putting my valve back in, I stretched the spring about 3/8" to increase the force required to operate the valve, but not go as extreme as the spring in the now DT unit.

Anyway, there are lots of options there if you want to keep messing with this area of the car.

And the DT BPVs sell fast at good $, so you won't have lost much money, just time on this effort. And you learned more about working on your car!

Matt

 

but i'd rather have someone else mess with it for me cause i have a tendency of messing things up

otherwise i sure did learn even more about my car