Hi, im new to this form, i just got a 1992 3000gt vr4, when i got it it was bogging when boost kicks in, found out it was because old owner was putting 87 unleaded, instead of 91, i put a octane boost in and it started to run great, but know its doing it again, when ever i punch it and boost kicks in, it starts to bog bad....any help well help

 

Make sure you are putting in premium and check your maf it might be going bad.

 

how do you know if your maf is going bad, any signs

 

It will bog down like that and turbos won't work properly mine did it after I had the turbo restrictor pulled out and it just happened to go a few days later

 

Usually vacuum leaks or spark related. Replace plugs and wires and check vac lines

 

^^^^^ This.