maf or some thing else

[talontsi4g63t]

hows it going dsmrs i have a pretty big problem wit my 90 tsi awd i bought the car not running and and figured out y it wasnt running the cam sensor had two stripped wires took of one from my other talon and installed it and the car fired up after a few tries but the problem is that i cant get it to stay running i have to play the throttle to get it to even rev up to 2k and wen i let go of the throttle the boost drops down to -7 vacuum i checked for boost leaks check out good so does all the vacuum lines not vacuuum leak wats so ever and i thing it might be a maf because i created the same probem on my 2g wen i unplugged the maf and it woulnt rev past 2k so i figured thats ### might be the problem i just really need some that can verify that maf might be the problem

thanx in advance

 

[97gstnick]

hows it going dsmrs i have a pretty big problem wit my 90 tsi awd i bought the car not running and and figured out y it wasnt running the cam sensor had two stripped wires took of one from my other talon and installed it and the car fired up after a few tries but the problem is that i cant get it to stay running i have to play the throttle to get it to even rev up to 2k and wen i let go of the throttle the boost drops down to -7 vacuum i checked for boost leaks check out good so does all the vacuum lines not vacuuum leak wats so ever and i thing it might be a maf because i created the same probem on my 2g wen i unplugged the maf and it woulnt rev past 2k so i figured thats ### might be the problem i just really need some that can verify that maf might be the problem

thanx in advance

What exactly did you do by "checked for boost leaks"?

 

[RayBan GST]

unplug your maf and check what happens? unplug also your TPS and tell us what happens



again how did you check for boost leaks? your vaccum should read 18-20 at idle and not 7


do a proper boost leak and check all your vaccum lines , hoses etc

good luck

 

[DSM_PWR]

When you replaced the CAS, did you make sure to sync it with a timing light??

If you don't have a timing light... (temporarily)
Loosen the bolts and play with the CAS till the idle seem's right...

 

[talontsi4g63t]

well i unhook one end of the ic piping pluged it up with a rubber plug and and did the same thing to the other side but on this one i installed a little one way valve and metered 15 psi no leak i didnt have a timing light but i did listen for different sounds its spot on and i also swaped my tp sensor from my other talon no difference wats so ever so im not sure wats going on

i tried the unplug the maf befroe i started the car and it woulnt start pluged it back in and still the same prob not want to stay running also when i floor the pedal the rpms go up to 2k and bog out and die does it sounds like some thing u heard of before

i appreciate any input and thanx for every thing so far

 

[97gstnick]

well i unhook one end of the ic piping pluged it up with a rubber plug and and did the same thing to the other side but on this one i installed a little one way valve and metered 15 psi no leak i didnt have a timing light but i did listen for different sounds its spot on and i also swaped my tp sensor from my other talon no difference wats so ever so im not sure wats going on

i tried the unplug the maf befroe i started the car and it woulnt start pluged it back in and still the same prob not want to stay running also when i floor the pedal the rpms go up to 2k and bog out and die does it sounds like some thing u heard of before

i appreciate any input and thanx for every thing so far

You should really have put your pressure cap on the inlet of the turbo or one of the pipes right after the turbo so you can pressurize the intake manifold. The intake manifold is more susceptible for having many leaks all over the place.

 

[talontsi4g63t]

i will try to do that boost leak test before i do any thing else and thanx for the advice is it possible for a dsm to turn on after the maf has been unpluged or doe is have to be pluged in i tried to start my talon with the maf of and it just cranks

 

[talontsi4g63t]

i just finished the manifold boost leak test and there wasnt any leaks this time i aded about 20psi and still held it pretty well

i also double checked that all my vacuum lines were hooked up to the correct place using vacuum diagrams and every thing was in its right place

 

[talontsi4g63t]

anuy suggestions for a exhaust system that i should use since im plning on full turbo to tip 3" exhaust