ok i was just getting on the freeway after i wern to the hardware store and my intercooler line blew off. i pulled over and reattached it.. but now on my in dash gauge it shows 0 boost. any ideas?

 

are you getting boost when you get on the car, or is there zero boost. What im trying to ask is if it is an electrical problem or mechanical

 

ok at idle it is below -20 on the gas it only goes to 0. than stops. the only thing that changed is the intercooler line that blew off

 

hey im looking for more ideas?!?!?!? needs help badly

 

Do you feel boost? Are you sure you didnt pop off any other vac lines?

 

ive searched and do not see any vac lines off. is there any certain ones to look for that would cause this problem. the boost doesnt really feel the same either

 

How is your idle? Seems like you are leaking boost at a vac line. It may ony be during boost when the lines expand under pressure.

 

MAKE SURE to check your Boost Sensor vac line very closely. If you face the engine bay from the front on your left (Passanger side) shock tower, there is a little black sensor with an electrical connector and 1 vac line coming off of it. It will say boost/pressure sensor on the top if your label is still there.

CHECK THIS LINE!!! Its what tells the ECU you are in boost and control's the stock boost gauge. If you boost while this line is NOT hooked up you will not be getting the extra fuel you need for the boost! Which will kill your engine.

Next you should check the ECU for error codes. If you have none then it might be bad solder joints on the back of the gauge cluster.

 

ok i know the boost press sensor is hooked up... at idle it sits at like 1200 sometimes and other times at like 850. it doesnt like jump around. just sometimes it will settle at 1200 sometimes at 850

 

Well if you have an irratic idle that might be the TPS, but it could also be some vac leak on the car..

Have you taken the upper intake manafold off recently? I only ask this becuase of the amount of lines that come off, and the plennum gasket that could be ripped and causing unmetered air to flow in...

I had a problem with my idle doing similar things but it was my cruise control cable and the accelerator cable at the Throttle body was not adjusted correctly...

Have to deal with one thing at a time... how about engine codes?

 

well the check engin light is not on, so i dont know of any codes. and being as though this is my sencond day owning a turbo rx, i dont know if the plemum was taken off before me. what shoulf the sock boost gauge read on my s5?? about how far up in the notches

 

It sounds like you have some accumulated fix up work from the previous owner.

The stock dash boost gauge can be intermittent & inconsistent.
At best it is slow because of an orifice pill in the sensor line that is needed to keep boost spikes from giving fuel cuts.
Many us add a mechanical boost gauge to get accurate readings.

After fixing vac leaks, maybe clean & test the BAC.
It’s the main idle control & it could be sticking.

Then check the throttle & cruise cables for free motion & proper slack.

I have a mirror site with a copy of the factory manuals at the link in my sig below

 

hey thanks for all your help.... it was a faulty boost gauge