[saab_family]

i have a huge boost leak somewhere!!! i was running about 17lbs (no ecu but thats what my gage is telling me). then it droped down to 10 and now its down to 5lbs. i have checked all the connections and replaced some vac lines but still cant figure it out. im gong to put the smoke michine on it tommorw and see if i can find it. its running SOOO slow!!!

 

[stevehayes01]

Can you give some more input on what your car is and the current setup on it?

My guess is that you are in LHM (Limp Home Mode) and you will need to pull the battery cable and reset the ECU. How are you getting to 17PSI? MBC or what? Also check your Boost Pressure Control Valve (unplug the electrical plug to it) to see if on base boost you are getting 5.5PSI with no computer control.

But for sure we need more info on your car and setup.

 

[saab_family]

its a t-5 9-3 with 3inch down pipe, saab sport, 3 inch intake, and MP's mbc+a, dont t-7's only have limp home mode?? i know fule cut is suppost to be at 15.5 but im at 5280feet and i have herd that sometimes at high altitude the fule cut is higher.

 

[Tweek's Turbos]

Did the clip fall off your wastegate?

 

[stevehayes01]

Sounds an aweful lot like you split a hose somewhere. Do you hear any noise like hissing or wooshing that is out of the ordinary? Or possibly like tweek said maybe you lost the wastegate clip or your wastegate is sticking. Could also be that your stock Bosch recirc valve is starting to take a dump on you and will need to be replaced.

 

[saab_family]

there diffently is a very very loud hissing noise thats not usually there. i though about the bosch valve too and tested a new one (my dad owns a saab shop) and thats not the broblem.

 

[stromer]

A bad bpv would make the distinct honking noise anyways. That is usually pretty easily identifyable.

 

[BLÜE 9-3se]

Check for a split in your intercooler hoses. The bends can get weak over time and give way to strong boost.

 

[saab_family]

we can't figure out whats wrong! we put a brand new dump vlave one it, nothing. put the smoke machine on it, no leaks found. checked the intercooler hoses, nothing. spring is still on the waste gate. the problem happened when i started to blow my dump valve off. it happaned a few times, when i hit full boost the dump falve just poped off. when i put it back on it was back to normal. then last time it happaned, when i put it back on, it didnt go back to normal. could the proplem be in my mbc+a???? it was working perfect up till then though. could the problem be in the dump valve?? the brand new one made no difference, should i get a real BOV and see it that makes a difference??

 

[stevehayes01]

take the mbc out of the picture and leave your dump valve in place and see if the issues still persist. I would be willing to be it is related to the mbc. If your BOV popped off then you had too much pressure in th eline and were overboosting.