hitting boost cut at 12 psi with lex afm and 550's

[suprawalt]

this problem just started happening yesterday,idont know if its just cuz its cold now or what.it will boost then around 10 or 12 psi it will get boost cut,code 34.wats normal boost cut with the lex afm anyways?i thought it is higher than that.heres my mods:
turbonetics 60-1
lex afm
rc 550's
hallman mbc
bic ddp

btw this did not happen a few days ago.
thanks walter

[jtran8]

I don't know anything about turbo you got but with lexus afm and 550cc , fuel cut ( spark cut ) should be around 23psi on 57trim ct26 ( 420rwh) with good tune . you might have boost leak some where ; btw colder temperature should increase fuel cut , because i'll run leanner .

[jdub]

fuel cut ( spark cut ) should be around 23psi on 57trim ct26 ( 420rwh) with good tune.


Ummm...1st, it is fuel cut (not spark cut).
2nd, if you're getting 23 psi out of a Lex/550 combo, you're are running some sort of piggyback controller.

Warm weather, 16-18 psi on a stock TCCS
Cold weather, drop that to 14 psi or so.

I do agree about the boost leak ;)

[suprawalt]

so you think i should check for boost leaks?and whats the most common way to do so?

[jtran8]

check 7MPOWER.COM Raymond made 422 rwh out of 550cc/lexus afm and safcii +57trim ct26 23psi of boost ! also in cold weather air is condense and by the time it go to intake manifold it's expanded .

[Poodles]

Boost leak, but also that turbo is going to be moving more air than a CT...

[jdub]

check 7MPOWER.COM Raymond made 422 rwh out of 550cc/lexus afm and safcii +57trim ct26 23psi of boost ! also in cold weather air is condense and by the time it go to intake manifold it's expanded .

And what does that have to do with fuel cut?

This response makes no sense.

[kikdurazz]

I would suspect a boost leak, I believe there was away to check for leaks on the SOGI.com website if I recall. First off just check all your clamps are tight.

Are you running hardpipes? aftermarket intercooler? AFPR, or piggy back controller?

You may wanna Start looking at adding this stuff, cause if you don't have any leaks, your hitting fuelcut for a reason and over taxing the fuel system at one point things may go boom in the night.

[suprawalt]

I would suspect a boost leak, I believe there was away to check for leaks on the SOGI.com website if I recall. First off just check all your clamps are tight.

Are you running hardpipes? aftermarket intercooler? AFPR, or piggy back controller?

You may wanna Start looking at adding this stuff, cause if you don't have any leaks, your hitting fuelcut for a reason and over taxing the fuel system at one point things may go boom in the night.

full 2.5 inch hardpipes,afc neo,walbro 255,12x24 intercooler.i do not have a afpr tho.the afr is good it just hits boost cut as i said it didnt do this a week ago.