ok I just installed a turbo kit on my buddies 96 prelude its obd2. it has a t3-t04e tial wastegate, bla bla,

ok for fuel manegement, it is using an inline fuel pump, a 12:1 paxton fmu, and a vafc, the prelude comes with 345cc injectors(I think) I set the vafc at 35% across the board.

I know for a fact the missing link is not working because it throws code 3 which is too much input on map sensor, I am going to go pick up some check valves right now at the fish store when it opens.

my question is shoudn't the thing go into boost at all when I give it gas, it seems like it should spool by 6 grand. woud the check valve cause it not to boost? I saw one pound last night but not any more.

thanks for all the help!

 

if you set the vafc 35% plus across the board then that's the reason your throwing a code....If the missing link is new there's no reason why it shouldn't be doing it's job...It works a lot better than check valves.Try setting the Vafc at zero and see how the car drives..

 

ok I think I am getting it, becausae thefmu already makes the afr 12:1 right, so setting the afc to 35% would be like making it like 20:1?

 

changing the settings that much messes with how much voltage the map sensor reads..well, at least that's what i think...either way, it throws a map code and the car won't boost right.

 

yeah i would even try puttin it into the neg range...... espically with a fmu..... i had that setup on my car until recently and i was in the neg on the afc

 

Yeah FMU's run super rich. If you hit the dyno, you will end up leaning your top end out. A LOT.

 

ok so we got everything hooked up somewhat right, but it bogs when it goes into boost, and it bogs when it goes into vtec. also it is getting like 6 lbs of boost, but it is gutless as my girlfriends geo prizm. Its using a missing link fror an obd1 car and its a 96 obd2 prelude. could that be why?

 

bump

 

can someone help please??

 

The vafc should be in the negative range. easiest solution is to buy some larger (450-550cc) injectors and ditch the fmu. Otherwise, get it on a wideband a go from there.

 

or keep the fmu w/ the big injectors and run obscene amounts of boost on a stock motor........ keep leaning the car out until it stops bogging down.......should solve the problems