8.5 1/8th and booost leak

[The_Jerbel]

Re: 8.5 1/8th and booost leak

alien,
You should do a couple of passes at Race City and see what times you get.

[The_Jerbel]

Re: 8.5 1/8th and booost leak

Kyle,

Did you take off the SAI pump? What did you find?

If you found no leaks there, then you can disconnect the N75 valve and blow into the line coming off of the driver's side of the N75 valve. It should be air tight. If it's not, the engine is coming out.

[aliencurv]

Re: 8.5 1/8th and booost leak

alien,
You should do a couple of passes at Race City and see what times you get.

eventually i will . it was only convenient for the kelowna track because i don't have to wait in line behind 186 civic's and skylines.

edit: what is a your average fuel adaption numbers for stage 3's? is 6% combined acceptable?

[RSS]

Re: 8.5 1/8th and booost leak

I think under 5 is acceptable but under 3 is the usual

[aliencurv]

Re: 8.5 1/8th and booost leak

so i climbed under the car and could not find a boost leak . i went through all the piping from the turbo to the TB.

i also took off the divertor valves and cleaned and lubed them.

i'll take it for a drive now cause it's oil change time anyway

[R-Audi]

Re: 8.5 1/8th and booost leak

A pressure test is the only way to find the small leaks... When are you available tonight? Lets arrange a time to do the pressure tester-cable swap...

[aliencurv]

Re: 8.5 1/8th and booost leak

hey mark, i sent u a txt .

so i took it for a drive . if it was a boost leak, then it could have been a diverter valve . but now i'm misfiring on cylinder 6 . blah! 6 has a brand new coilpack on it too . blah!

[R-Audi]

Re: 8.5 1/8th and booost leak

The only thing left that can cause missfires is the ignition amplifiers.... Not 100% sure how to tell thats what it is though.

[The_Jerbel]

Re: 8.5 1/8th and booost leak

Switch them and see if the misfire changes cylinder.

[The_Jerbel]

Re: 8.5 1/8th and booost leak

The only thing left that can cause missfires is the ignition amplifiers.... Not 100% sure how to tell thats what it is though.

Actually, a LOT of things can cause misfires. Boost leaks, AFR, timing, idle load, HG, SP's, CP's, IA's, etc. and the list goes on.

[aliencurv]

Re: 8.5 1/8th and booost leak

Actually, a LOT of things can cause misfires. Boost leaks, AFR, timing, idle load, HG, SP's, CP's, IA's, etc. and the list goes on.

i think he means that i've gone through all those .

i've..
- tested the resistance and verified the o2 sensors
- tested the iat sender
- changed almost all the CP's
- checked boost leaks
- verified all the values i can on vag-com (timing, load, o2, throttle, commanded boost, actual boost, maf, iat, etc)

to check the transistor units, i can def try swapping them and see if i experience misfires on the other bank . i've only expereinced transistors to work or not work, not partially work . so i'll be interested if that's the issue .

[The_Jerbel]

Re: 8.5 1/8th and booost leak

Have you ever disassembled these IA's and looked at them? It is certainly possible for just one cylinder to fail. I've seen it happen a few times...

[R_Ethug]

Re: 8.5 1/8th and booost leak

IA's??

[The_Jerbel]

Re: 8.5 1/8th and booost leak

Ignition amplifiers. Try to keep up with the acronyms

[aliencurv]

Re: 8.5 1/8th and booost leak

they are amplifier transistors . they take a +5 trigger from the computer and pass the +12 from the battery to the cp . transistors are similar to a relay but solid state so their reaction time is in ms and ns measurements . because i design circuits and program microcontrollers for a living, i refer to the components by their natural name