The reason you MUST do a "boost leak test"!! Don't pass go. Read this.
I did a boost leak test and found some leaks that I fixed. I have a forge mbc and it leaks from the vent hole at around 5psi and up. Is this normal? When I did the test I clamped off the hose to the mbc to check the system. I have the hard spring in it and its backed off all the way. It goes to 22 psi at full boost.
I did a boost leak test and found some leaks that I fixed. I have a forge mbc and it leaks from the vent hole at around 5psi and up. Is this normal? When I did the test I clamped off the hose to the mbc to check the system. I have the hard spring in it and its backed off all the way. It goes to 22 psi at full boost.
I'm going to bring this one back from the dead.
I put on a TBE, Forge MBC, Walbro fuel pump, and cone filter air intake, and somewhere in there started getting a P0171 "System too Lean - Bank 1" ECU code thrown on a regular basis. I have checked everything I could, and I am wondering if I could be getting this kind of code so constantly from a boost leak somewhere in the system?
I am going to fabricate a boost leak tester like the ones described in this thread (something like this one - http://www.vfaq.com/mods/ICtester.html ) and check it, but I am wondering if anyone else has had a System too Lean ECU code actually being thrown from a boost leak?
I put on a TBE, Forge MBC, Walbro fuel pump, and cone filter air intake, and somewhere in there started getting a P0171 "System too Lean - Bank 1" ECU code thrown on a regular basis. I have checked everything I could, and I am wondering if I could be getting this kind of code so constantly from a boost leak somewhere in the system?
I am going to fabricate a boost leak tester like the ones described in this thread (something like this one - http://www.vfaq.com/mods/ICtester.html ) and check it, but I am wondering if anyone else has had a System too Lean ECU code actually being thrown from a boost leak?
you could, problem is.... and i stress this to all of you.. but you need to boost leak test close to what you will be runing for boost. sometimes you wont find a leak if your boost gauge only shows 5psi while testing, up it to 15psi or 20psi and might find a T-bolt not tight enough, and so on... so your leak tester that you"make" must be able to take alot of air pressure without shooting off.
you could, problem is.... and i stress this to all of you.. but you need to boost leak test close to what you will be runing for boost. sometimes you wont find a leak if your boost gauge only shows 5psi while testing, up it to 15psi or 20psi and might find a T-bolt not tight enough, and so on... so your leak tester that you"make" must be able to take alot of air pressure without shooting off.
just cap off the valve cover breather and BCS if you do, otherwise you may leak boost out of one of them (and its not great to pressurize the head)
