I have an evo 8... and lust hooked up aem wideband and defi boost gauge. On in idle my vacume.. is a 20.. and my air fule is 14.8 hard acceleration. My boost peaks out at 13 and my air fule goes to in the mid 10"s... nownsure what to think... all stock except injen piping. And aps bov..

 

how about put back your stock diverter valve

 

I don't have it... also the aps re circulates like the stock one..

 

Ok it sounds like something's ****ed up bad! Your running lean and your boost gauge is reading + when it should be -

Don't go into boost anymore or you risk blowing up your ****!!
Drive her slow and make a tune appointment fast!!!

 

I thought on the wideband the lower the number the richer it is.. and on the low boost. Could my oem electronic boost controller be bad?

 

Your punctuation make this confusing. -20 vac/14.6 afr @ idle and 10-11afr at wot is normal. If that's what you meant to say then everything is fine. Also yes, the lower the number on the wideband the richer (less air for a given fuel value).

 

Ok sorry yeah that's what I mean... so is my air fuel is all fine... and my vaccume is fine...is the 13psi of boost bad then.. I believe 19 is normal... and what are the odds that its just the electronic boost contorlle

 

There's no way of knowing without looking. It could be stock boost controller and the previous owner backed out the wg preload? Maybe you just have a leak somewhere? You'd have to look and see what's going on there.

 

Well it could be my lower intercooler pipe i know its bent and nit a perfect fit... and I do also have a manual boost controller that I haven't installed yet....... I just didn't think id get good vacume

 

If your licp is leaking at the jpipe, that can be a huge leak. Definitely get that checked out ASAP.

 

Did you fix the LICP yet, OP ?

 

Im watching for a nice set of pipes. for a reasonable price.... not sure what kind to get.. but I know injen don't impress me thinking maybe ets.. I just know I need to get all the connectors too... but unkeee I get a new bov... need a stock flange.... and if it still low then I will look for a decent intercooler

 

13 psi is waste gate pressure. It could be that your stock solenoid is bad or not hooked up right. If there are any Check engine lights on get it checked out and see whats up!

 

I am not so sure that I agree with the generalization that 13# is WG pressure. Sure, his WG may be adjusted to 13#. But base spring pressure on an MHI 16G VIII with a stock actuator is in the 10-12# range. If he is seeing 13-14# then it is preloaded a bit.

 

I have no check engine light on