Well first of all I'm running a saab setup on an 04 cav with lsj injectors and a cartech adjustable fmu. I have my boost controller on there but noticed I can't get it to go over 6/7psi. When the motor is on I can hear what sounds like a vaccum leak coming from somewere in the front area of the motor but I have gone over all my lines and have checked everything else I just seem to find were its leaking from. Any tips or anything from the guys that have had they're cars boosted for a while already?
What does your Vac pressure read at idle? Are you sure it's a vac leak and not just a boost leak, because if not that reading will tell you. It's really hard for anyone online to really figure it out for you though, because it could be anywhere but I'll list what's possible so you can go through and check it all out.
I mean, a VAC leak is not too difficult to spot, because it's going to be between somewhere on your intake manifold, or a connection to the intake manifold. Have a look at your brake booster connection, the EVAP connection, MAP sensor. The fuel pressure regulator always seems to make a whistling noise on my car - but it's not really connected to VAC, it should be t'd into your intake plumbing somewhere between the throttle plate and the turbo. Where is your boost gauge getting it's reading from?
A boost leak will be somewhere on your charge pipes. so I mean, it could be even a hole in your intercooler. Check any connections that you have, your IAT what did you do with that? Is it threaded or in a grommet, because if threaded make sure it's got some teflon tape on the threads, and if a grommet, switch to a threaded sensor. Check the wastegate signal, is it on the compressor? Again, teflon tape is your friend. Obviously, all the hose clamps should be tight on your connections. Check welds on your pipes to see if you have any little spots that are leaking air.
One of the best and easiest ways to located the leak is to get some carb cleaner and just spray spots you may think might be leaking and if your car's idle jumps around then you've hit the spot.
" To study and not think is a waste. To think and not study is dangerous. "
^ exactly took the words out of my mouth. try using a vaccum distrubition block to manage your lines and see if that helps.
Ideling vac is right in between the -10 and -11
the wastegate is running directly to a port on the compressor
All my lines are zip tied and I've checked all my sensors everything looks fine
My iat is a screw in camaro one the bung is welded into the charge pipe, I put teflon tape on the threads again just to make sure
Annd my vaccum source is off the intake manifold the small port under the throttle body I think that's were the fpr gets its signal from
When you say between -10 and -11, I am assuming you are reading that in PSI? If it's PSI then your vacuum is fine, if it's inHg units, then you have a bit of a problem. I will assume that it's PSI for the moment. In this case, you need to be looking somewhere between the compressor exit and the throttle plate. Like I said, spray some carb cleaner around the welds on your pipes, or any other places of interest. Spray around your intercooler too.
" To study and not think is a waste. To think and not study is dangerous. "
(while the car is running of course)
" To study and not think is a waste. To think and not study is dangerous. "
