Widband tells me bad things :(

[sviellvoicae]

Ever since i got my car i have had issues with it running right. well everyone says you need a wideband to find out exactly what is going on. well i got one and its not fun

anyways i have a walbro 255 pump and from what i am told 550 cc injectors the guy that told me this also sold me the car and i have had nothing but issues with it. anyways it says my a/f is in the 9's under boost and i also dont have any throttle response. any ideas what can cause such a low a/f? at cruise its 13-14 if that helps

o i have a 91 240sx with a redtop sr20det t25 front mount and exhaust not much but im sure this helps

[modulation]

If you don't have a boost leak then wWhat type of engine management does it have?It seems it doesn' t have the right K injector constant for your injectors and that is why you are running rich always.

You could either fix that in engine management or if you have no idea how to do that then you'd have to take it and have it done by a professional or if you are too poor to do that then run some sort of hacked maf which lets a little bit more air in (like a tiny bit maybe 10% increase or something I'd ahve to do the math.)

Its not your o2 sensor cause it happens under WOT which is open loop as well as running rich when you car should be in closed loop (but it can only correct so much.)

[sviellvoicae]

ok im not too good at this and the shop i go to always helps me out but it seems like some times when it comes to my car they are scratching their heads. i have a z32 maf and am planning to do an enthalpy tune but dont want to have the same issue if its something else causing it. is there any way to find out injector size?