Car Not Boosting

[killswitch88]

im experiencing a shithouse feeling when im driving, the boost takes forever to come on and then its like its making a half assed attempt to do so because it makes nowhere near full boost. also when it gets to just before 6000rpm the car just pulls back on me and its all over. this has only started happening recently. shown in the photo below is a ding in the cooler piping that i think may be causing some of this but its been like that for quite some time so im led to believe its a deeper issue. only mods are FMIC, exhaust, microtech & boost raised to 12psi. any help would be greatly appreciated. cheers, mark

update: checked the vacuum line that runs from the microtech to the plenum and found this (3rd time i checked it i missed it both times

pic is a bit shite but u can clearly see the vacuum line is farked and from what id been told this was wat was causing the car to shit out so i changed the vacuum line over today and it is no better. absolutely everything seems to be fine im certain there has to be air leaking from somewhere. if the boost controller is leaking would i be able to hear the air coming out (it is only a cheapo BC)

oh and also i noticed this....

to me it looks like the gasket for the throttle body has escaped out the side or something, i dont really get it, if it has could this be the problem?

Edited December 3, 2007 by killswitch88

[GTR-32U]

im experiencing a shithouse feeling when im driving, the boost takes forever to come on and then its like its making a half assed attempt to do so because it makes nowhere near full boost. also when it gets to just before 6000rpm the car just pulls back on me and its all over. this has only started happening recently. shown in the photo below is a ding in the cooler piping that i think may be causing some of this but its been like that for quite some time so im led to believe its a deeper issue. only mods are FMIC, exhaust, microtech & boost raised to 12psi. any help would be greatly appreciated. cheers, mark

what caused that ding ?? is it possible that maybe the piping itself may have developed a crack thus blowing boost out to atmoshere..I would start with all the silicon hose fittings first and then look into that ding area

[killswitch88]

what caused that ding ?? is it possible that maybe the piping itself may have developed a crack thus blowing boost out to atmoshere..I would start with all the silicon hose fittings first and then look into that ding area

one of the silicon hose fittings was farked and you could hear the car shreiking from a mile away but that is replaced and now there is no noises but yes i will double check the rest of them.

[killswitch88]

all of the silicon joiners seem fine there was a vacuum leak but i fixed that but still having the same problem. the boost gauge doesnt move into the positive til about 4500rpm and only just makes it to about 3-4 before it gets to 6000rpm and f**ks out on me.......any ideas?

[dave_1]

the wastegate has a hose coming from the manifold , id check that.

if boost is 12psi, maybe your boost controller is leaking. maybe take that out and run stock boost and see if it does the same fault?

[killswitch88]

would i hear the boost controller leaking?

[r33cruiser]

check your ignition bro. make sure your intercooler hoses are all good and tight.

also does your car have a FCD?

[killswitch88]

ummm...no to the fcd, ive checked all the silicon and it seems to be intact, ive farked a silicon joint before but i could still make boost this mother f**ker will not get out of the negative range. how would u go about checking ignition?