not fuel cut then what is it?

[xtsiawd]

car wont let me boost over 15psi
alright its a 92 talon awd 6bolt
fmic/ fp green/ 2gmaf / safc
that car went 11.2 on pump last year at 30 psi
now the car like fuel cuts after 15 psi
i though fuels cut but idc only gets up to 30%
AND THE PULSE WIDTH NEVER GOES DOWN TO ZERO the car has no boost leaks i have gone throught all afc wire s and maf and all have no resistance
i can figure it out help



walboro 255hp .fpr 680cc pte injectors

 

[el guapo]

did you recently change plugs or widen the gap?

 

[xtsiawd]

i dont know what th gap is but i have msd dis2 box

 

[lazyazzdaddy]

just wondering what kind of waist gate you have? my friend had a similer problem and found his waist gate was f'd up sometimes would close and work properly other times would just let the boost blow thru. might not be the same problem as yours but i would start there.... then again what do i know..
Good luck

 

[xtsiawd]

i have a tial 38mm on a slowboy tube manifold
i have a stock block and head minus balence shafts

and a tiel 50mm bov

 

[lazyazzdaddy]

thats about the same set up i have. I've never had any problems with mine.. but .... who knows. I would give it check though, if thats not it im sure someone on here with more experance than me will be able to help you

 

[xtsiawd]

i have the coil packs relocated but it worked before
the night this first started happenig i was running sunco supreme race gas

 

[lazyazzdaddy]

just thought of something does your boost hold at 15?

 

[xtsiawd]

well some times it ll get up to 20 but as soon as it really gets past 15psi or around like 400 hz i think it starts to break up and literally cuts the motor

anyone seen this before??

 

[tbonitz301]

Justa thought, but you werent running race gas with your cat on were you Or is it removed

 

[xtsiawd]

cat was removed and i have a 3in turbo back

 

[tbonitz301]

Man i really am stumped. I'd try that ecu when you get a chance.