running lean and rough idle low vac??? HELP !!!

[boost69]

hey guys im having some trouble with my car,i have a 16g with supporting mods. its running very lean at idle high 18, and low 19's on the wideband,and it runs very rough at idle, and wants to die, the vac is reads 15 at idle, and the blow off blows off weird, i checked the plugs and they are deff running lean, the plugs are gapped correctly and i just put new wires on and still lean,

PLEASE HELP!!!

 

[gofer]

You definitely have a vacuum/boost leak, did the car just start doing it or did you do something to it and when you put everything back together this is a result?

 

[iron bird]

Boost Leak Test

 

[boost69]

it was running weird for a while and the weird blow off, but after i replaced the manifold gasket, it started the lean and the rough idle

 

[gofer]

it was running weird for a while and the weird blow off, but after i replaced the manifold gasket, it started the lean and the rough idle

If you replaced your intake manifold gasket before it was idling lean and had low vacuum then yes, its most definitely a vacuum/boost leak.

 

[boost69]

i replaced the exhaust manifold gasket sry for the mix up, any help would be great thanx

as well as the fuel pump doesnt turn on when the key is turned on but when it starts up FP reads about 41psi, so im completely stumped

 

[Gs Dewd]

Check for vacum leaks with carb cleaner(2+2). You have a leak somewhere and the lean problem can cause some very bad for you issues if not solved.

 

[boost69]

yea im not driving it , it has a cel but its cause of my wideband, it has to be a vac leak, can any one give me vacuum diagram on a 95 gst?

 

[dyetrying91]

yea im not driving it , it has a cel but its cause of my wideband, it has to be a vac leak, can any one give me vacuum diagram on a 95 gst?

Just run a boost leak test and you'll hear where the leaks are.

 

[boost69]

i think it might be my injector seals??? any input on that?