cant boost underload, then sputters at 4500rpm

[Blaze4G63]

after about 3 months of my car sitting i pulled her out just to keep everything in working condition and my car will not hit rev limiter at 5500...also when i go to do a couple pulls my car starts spooling but as soon as i hit more then 5 psi it sputters and bucks really hard...i replaced my spark plug wires and checked my wideband and its saying 11s....i also did a boost leask test and there are no leaks... i do have a exhaust leak on my header and the head and also my tublar mani is cracked..and i think i have a lil bit of a down pipe leak but the car never did this before....so would u say its the exhaust leaks??? thanks

 

[rEclipserGST]

Wideband will read inaccurate due to your exhaust leaks. Also, you state you did a BLT... what pressure did it start to leak at? Because it will leak eventually.

 

[636chris]

check your maf , do you have a datalogger or link

 

[Blaze4G63]

it leaks a liltte bit at around 10 psi around the tb but nothing to bad and yes i do have link...i thought about the maf i use a gm 3 inch so ill check it after work THANKS GUYS i also have a log from when it was doing it if u would like to see it

 

[636chris]

yes post a log so we can take a look

 

[Blaze4G63]

im at woerk right now so i dont have the file on this computer here it is in other thread though thanks for looking it does it about 4400 rpm then i let off as u can see in the log

http://www.dsmtuners.com/forums/tuning-engine-management/420000-stallin-boost-no-boost-leaks.html

 

[Blaze4G63]

does the maf look ok ?

 

[MY1GDSM]

Cant look at your logs atm but Im still willing to help get you a tune would be willing to travel if need be sounds like you have a couple issues to take care of first but just let me know... .

 

[miguelmcv]

You need to Capture your Wide band.

It doesn't show Wide band, Capture Wide band to see how rich or lean you are running.

I know you stated that was 11, But We need to see how is doing.

Capture that and post another Log.

 

[Blaze4G63]

ok ill take a log soon so u guys can see..ive been a bit busy at work and with the inlaws with the hoilday season

 

[MY1GDSM]

Just looked at your log... .

Pulled up your Ecu Config an there's No Fuel Timing or Maf Comp Tabs ???

I'm guessing you need to Upgrade your firmware...
Make sure you upgrade to the newest laptop software first

Some More Detail on your setup would help since your profile is empty an since your missing tabs...

 

[Blaze4G63]

Just looked at your log... .

Pulled up your Ecu Config an there's No Fuel Timing or Maf Comp Tabs ???

I'm guessing you need to Upgrade your firmware...
Make sure you upgrade to the newest laptop software first

Some More Detail on your setup would help since your profile is empty an since your missing tabs...

i have v3 lite but i thought i had those tabs i guess ill have to see if theres any updates..anyways guys im waiting to address this problem till this week because my fp mani will be here mon! also i replace my gm maf and its still doing the same thing i took a video also so i will post those THANKS GUYS

im also leaning toward a stuck open wastegate? just trying to trouble shoot in my head at work

 

[Blaze4G63]

i just installed my FP manifold and i think it fixed it for the most part but it still sputters at WOT i think my injectors are dying out..i have to run a log though...log coming soon!

 

[Blaze4G63]

a massive exhaust leak was causing this to happen guys thanks anyways! my tubular header has cracked all the way around and the o2 to down pipe also had a leak and couple snapped exhaust studs ..i buttoned it up with a fp manifold/stud kit and it was smooth boostin!