Re: boost controller not working. wastegate is opening at 5 psi.
 

lol...I like the sound of that...but yeah, it'll climb until you let off the throttle or the engine pops, whichever comes first...

Re: boost controller not working. wastegate is opening at 5 psi.
 

∞-(∞+(5^2))

Re: boost controller not working. wastegate is opening at 5 psi.
 

ok so he called finally and said he bought a new mbc and it's still not boosting past 5psi.
i told him to unhook the wastegate. i don't think he understood me when i told him to watch the amount of boost. that it will keep rising till something stops it.
he said " so if it goes past 5psi where will it stop, so i know?" i said if it goes past 5 it's gonna keep going till a rod comes out the block..

Re: still need some ideas, read last post please.
 

ok he unhooked the wastegate and it opened around 5psi
i told him there is a leak somewhere and to also check the spring and diaphram in the wastegate. he said they are both fine.
now he wants to buy a different wastegate....

he says all the couplers are good and tight.
is there anything i should check? i'm probably going to his place today to take a look at it before he buys more stuff.
i'm going to retest everything listed so far, but what else should i look at?

Re: still need some ideas, read last post please.
 

does it idle funny if it does you might have a cavuum leak somewear like a throttle body gasket or something

Re: still need some ideas, read last post please.
 

no man it idles and runs great.
i thought it was just a broken mbc.
isn't it strange that a boost leak would be at the same psi everytime?

Re: still need some ideas, read last post please.
 

Not really, if you think about it. The charge pipes and couplers would hold to 5 psi, but any more pressure and there was a leak allowing air to escape. Makes sense...to me. :-\

Re: still need some ideas, read last post please.
 

Plugged catalytic converter is a possibility. Or perhaps a damaged turbine.

Re: still need some ideas, read last post please.
 

what kind of shape is the turbo in? If its a old haggerd one, I could see it not boosting past 5 psi. Im just thinking outloud. So im sot saying the turbo is bad, Im just saying it could be. Just like it could have a boost leak.

Re: still need some ideas, read last post please.
 

what is a catalytic convert :l
ok so i got it figured out. there was a boost leak, fixed that and it wouldn't go past 5 psi.
so i unhooked the wg and it went over 5 psi.
next i looked at the boost controller. he had some cdm one on there that he just bought so i'm pretty sure it's not broke.
i turned the adjustment knob the way the + arrow was pointing and it was still 5 psi. my wife said "maybe the ching chongs got the directions wrong" "turn the boost down all the way".
i did that and it went a little past 15psi. so i turned it back a few clicks and it was at 8psi. so it turned it back 1 click and it was at 10 psi. he wanted 12 psi so i went 1 more click.

sorry if that was confusing, it lost me when i was typing it.

so why the hell do i have the boost down almost all the way and it's at 12 psi. but if i turn the boost up it goes down.
do we have the hoses swapped.


right now we have them like this
Attachment 13518
the little "T" in the corner, where does that go?